CN105143116B - The chemical conditioner of lime mud and use its dewatering of lime mud - Google Patents
The chemical conditioner of lime mud and use its dewatering of lime mud Download PDFInfo
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- CN105143116B CN105143116B CN201480023030.2A CN201480023030A CN105143116B CN 105143116 B CN105143116 B CN 105143116B CN 201480023030 A CN201480023030 A CN 201480023030A CN 105143116 B CN105143116 B CN 105143116B
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- Prior art keywords
- lime mud
- represent
- integer
- chemical conditioner
- mud
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
Abstract
The present invention provides the chemical conditioner of the lime mud can being dehydrated bag purees efficiency calciferous well, and it is for comprising the chemical conditioner of the lime mud of the polyoxyethylene polyoxypropylene alkyl ether represented by following formula (1).R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH ... (the 1) (R in formula1Representing straight chain and/or the branched alkyl of carbon number 10～18, m represents the integer of 1～10, and n represents the integer of 1～10).
Description
Technical field
The present invention relates to the chemical conditioner of lime mud and use this chemical conditioner to wrapping mud calciferous
The method that shape thing (lime mud) efficiency carries out being dehydrated well.
Background technology
All the time, the causticization operation during paper and/or pulp manufacture, particularly kraft pulp manufacture is as follows:
By the black liquor boiler combustion reclaimed by steaming and decocting of wooden sheet, the melting thing obtained is dissolved, making
For the green liquor of its supernatant puts into quick lime, the sodium carbonate in green liquor is converted to sodium hydroxide, removes
The calcium carbonate generated, thus modulation is as the white liquor of the cooking liquor of wooden sheet.Green liquor usually with sodium carbonate,
Sodium sulfide is as the strong alkaline aqueous solution of main component；If putting into quick lime, then calculogenesis in this green liquor
Ash reacts with water and generates calcium hydroxide, with the sodium carbonate generation exchange reaction in green liquor and to generate water insoluble
The calcium carbonate of property.As a result, green liquor comprises containing water miscible sodium hydroxide, sodium sulfide and water-insoluble
The purees of calcium carbonate (below, is also denoted as " lime mud " sometimes.).
Aforementioned lime mud is by filter solid-liquid separation, and filtrate is to comprise the shape of the white liquor of sodium hydroxide, sodium sulfide
Formula is transported to pulp cooking operation, and the dewatered cake separated at filter surface is stripped, and carries out with kiln
Fire and be regenerated as quick lime, again use in causticization operation.The filter that solid-liquid separation is used is Austria
Profit not filter, Young filter (Young Filter) or precoat filter (precoat filter) etc., separated
The moisture content of dewatered cake be usually 30 mass %～40 mass %.But, if the hole of filter is gradually
Blocking, then the moisture content of dewatered cake rises, and processed is not only brought obstacle, and carries out with kiln
The fuel needed during roasting becomes many.Then, the operating of arresting stop and carry out the washing of filter cloth surface, washing
Obstacle operationally can be brought when frequency is many.
In order to improve the dehydration property of lime mud, it is proposed that use various dehydration accelerator.Such as, patent literary composition
Offer and in 1, disclose the method using cation property copolymer；Patent Document 2 discloses carbon number
The oxirane 3 of the straight chain alcohol of 10～14～4 moles of addition products are as the technology of dehydration accelerator.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Laid-Open Patent Publication 57-48340 publication
Patent documentation 2: Japanese Unexamined Patent Publication 2000-344518 publication
Summary of the invention
The problem that invention is to be solved
But, there are the following problems for the technology of aforementioned patent literature 1: lime mud is assembled but dehydrating effect does not has
There is change big, in aggregation, encase water on the contrary and cause dehydration rate to reduce.It addition, aforementioned patent literature 2
Technology in there are the following problems: lime mud is mixed into more bubble and hinders dehydration, thus be dehydrated filter
The moisture content of cake does not reduce, and can not get the effect that dehydration accelerator adds；And then, by causticization operation
Change, add above-mentioned dehydration accelerator can not realize the situation of stable dehydration even if there is also
Deng.
The present invention makes in this case, it is therefore intended that providing can be to wrapping mud calciferous
Shape thing efficiency carries out the chemical conditioner of lime mud that is dehydrated well and uses this chemical conditioner to causticization
The method that mud efficiency carries out being dehydrated well.
For solving the scheme of problem
The present inventor etc., the result furtherd investigate to realize object defined above to carry out obtains following opinion.
By comprising as the lime mud mud of main body adds to the calcium carbonate generated in causticization operation
There is the lime mud chemical conditioner of the polyoxyethylene polyoxypropylene alkyl ether of ad hoc structure (composition), by
The surface of this this lime mud is hydrophobic, can make the major part of the absorption water can not removed in attraction dehydration
Being removed, when carrying out vacuum attraction dehydration with sludge filtration device, dehydration property is promoted such that it is able to
Reduce the moisture content in dewatered cake.And then find, by using this chemical conditioner to make its structure change,
Can as low temperature dewatering with or high temperature dehydration with and use respectively, and lime mud becomes be difficult to be mixed into
Bubble, the moisture content of lime mud reduces fully.
The present invention is to make according to above-mentioned opinion.
That is, the present invention provides following (1)～(10).
(1) chemical conditioner of a kind of lime mud, it comprises the polyoxyethylene represented by following formula (1) and gathers
Oxygen propylidene alkyl ether:
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)
(the R in formula1Represent the straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～10 whole
Number, n represents the integer of 1～10.).
(2) according to the chemical conditioner of the lime mud described in above-mentioned (1), wherein, in formula (1), R1Former for carbon
The straight chain of subnumber 12～16 and/or branched alkyl, m is the integer of 7～9, and n is the integer of 1～4.
(3) according to the chemical conditioner of the lime mud described in above-mentioned (1), wherein, in formula (1), R1Former for carbon
The straight chain of subnumber 10～18 and/or branched alkyl, m is the integer of 1～3, and n is the integer of 1～9.
(4) dewatering of a kind of lime mud, comprising: severe by described in any one of above-mentioned (1)～(3)
The chemical conditioner changing mud adds the operation to lime mud.
(5) dewatering of a kind of lime mud, comprising: the causticization operation in paper and/or pulp manufacture
Middle generation, more than 20 DEG C and less than 60 DEG C lime mud adds the dehydration of lime mud described in above-mentioned (2)
The operation of auxiliary agent.
(6) dewatering of a kind of lime mud, comprising: the causticization operation in paper and/or pulp manufacture
Middle generation, more than 50 DEG C and less than 85 DEG C lime mud adds the dehydration of lime mud described in above-mentioned (3)
The operation of auxiliary agent.
(7) dewatering of a kind of lime mud, comprising:
Temperature measuring operation: the temperature to the lime mud generated in the causticization operation in paper and/or pulp manufacture
It is measured；
The selection operation of chemical conditioner: the temperature at aforementioned lime mud is 20 DEG C and selects less than when 50 DEG C
Select the chemical conditioner described in above-mentioned (2), select when the temperature at aforementioned lime mud is more than 50 DEG C and less than 60 DEG C
Select at least one of the chemical conditioner described in above-mentioned (2) and the chemical conditioner described in above-mentioned (3), aforementioned severe
The chemical conditioner described in above-mentioned (3) is selected when the temperature of change mud is more than 60 DEG C and less than 85 DEG C；
Add the operation of chemical conditioner: in aforementioned lime mud, add the operation of selected chemical conditioner；
With
Dehydration procedure: the lime mud that with the addition of aforementioned chemical conditioner is dehydrated and obtains dewatered cake.
(8) according to the dewatering of the lime mud described in any one of above-mentioned (4)～(7), its be to paper and/or
The lime mud generated in causticization operation in pulp manufacture carries out the method being dehydrated, comprising: by above-mentioned
(1) chemical conditioner of the lime mud～described in any one of (3) adds to sludge filtration device conveying pipe arrangement
Operation in the inlet portion of pump or the shower water of sludge filtration device.
(9) according to the dewatering of the lime mud described in any one of above-mentioned (4)～(7), its be to paper and/or
The lime mud generated in causticization operation in pulp manufacture carries out the method being dehydrated, comprising: by above-mentioned
(1) chemical conditioner of the lime mud～described in any one of (3) adds to the shower water of sludge filtration device
Operation.
(10) according to the dewatering of the lime mud described in any one of above-mentioned (4)～(9), wherein, paper and/or
Causticization operation in pulp manufacture is the causticization operation during kraft pulp manufactures.
The effect of invention
Pass through the present invention, it is provided that bag purees calciferous (lime mud) efficiency can be carried out well
The chemical conditioner of lime mud of dehydration and use this chemical conditioner that lime mud efficiency is taken off well
The method of water.
Detailed description of the invention
Chemical conditioner firstly, for the present invention illustrates, then, for employing the severe of dehydrant
The dewatering changing mud illustrates.
[chemical conditioner]
The chemical conditioner of the present invention is characterised by, it comprises the polyoxyethylene represented by following formula (1)
Polyoxypropylene alkyl ether:
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)
(the R in formula1Represent the straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～10 whole
Number, n represents the integer of 1～10.)
The dewatering efficiency of the chemical conditioner of this structure is excellent.
Herein, R1Carbon number, the above-mentioned numerical value of m and n be meansigma methods, it practice, can also contain
The composition bigger than this numerical range and/or the composition less than this numerical range.Wherein, preferably R1Carbon atom
Number, m and n within the above range, do not comprise R1Carbon number, m and n be at the material of above-mentioned scope.
Herein, chemical conditioner can be to meet above-mentioned formula (1), R1, the multiple types of condition of m and n
The mixture of polyoxyethylene polyoxypropylene alkyl ether, it is also possible to the polyoxyethylene for single kind is gathered
Oxygen propylidene alkyl ether.
It should be noted that in this specification, " straight chain of carbon number 10～18 and/or branched alkyl "
Refer to " straight chained alkyl of carbon number 10～18 and at least the one of the branched alkyl of carbon number 10～18
Kind ".That is, the R during the chemical conditioner of the present invention can comprise formula (1)1Straight for carbon number 10～18
R in the composition of alkyl group and formula (1)1Composition arbitrary for the branched alkyl of carbon number 10～18
Person, it is also possible to comprise both.
The chemical conditioner of the present invention is not damaging the scope of the purpose of the present invention, it is also possible to contain as required
Other composition.As other composition, can be containing the most existing known flocculant, other table
Face activating agent etc..Such as, in the case of foaming fierceness, polyoxypropylene alkyl ether can be added.
Wherein, from the viewpoint of dewatering efficiency improves, the polyoxy represented by formula (1) in chemical conditioner
The content of ethylidene polyoxypropylene alkyl ether is preferably more than 90 mass %, more preferably 95 mass % with
On, and then more than preferably 99 mass %, more preferably 100 mass %.
Manufacture method ＞ of ＜ chemical conditioner
Polyoxyethylene polyoxypropylene alkyl ether represented by formula (1) can be by making higher alcohol and ring
Ethylene Oxide, ethyleneoxide addition manufacture.
The addition of the addition of higher alcohol and oxirane and higher alcohol and expoxy propane can be randomly or
Block, furthermore it is possible to first addition of ethylene oxide or first addition expoxy propane.It is preferably first addition epoxy third
The block addition product of alkane, then addition of ethylene oxide.
For higher alcohol addition expoxy propane, the method for oxirane, there is no particular limitation, Ke Yitong
Cross usual way to manufacture.As one example, first, higher alcohol is added to pressure vessel, as
Catalyst adds the alkali metal hydroxide of ormal weight, is preferably sodium hydroxide and dissolves.Then,
At temperature 150～160 DEG C, pressure 2～4kg/cm2Left and right is stirred while be blown into the epoxy third of ormal weight
Alkane, is allowed to react ormal weight.Then, it is blown into oxirane to be allowed to react.Afterwards, cool down and with inorganic
After acid, preferably sulphuric acid neutralization, filter.In such manner, it is possible to obtain the polyoxy represented by formula (1)
Ethylidene polyoxypropylene alkyl ether.
As higher alcohol, can list: decanol, tip-nip, isodecanol, lauryl alcohol (dodecanol),
Tridecyl alcohol, different tridecyl alcohol, myristyl alcohol, pentadecanol, spermol, different spermol and oleyl alcohol
One or more.
The chemical conditioner ＞ of ＜ the 1st mode
The chemical conditioner of the 1st mode is the polyoxyethylene polyoxypropylene alkyl represented by aforementioned formula (1)
The R of ether1It is 1～4 for integer, n that the straight chain of carbon number 12～16 and/or branched alkyl, m are 7～9
The polyoxyethylene polyoxypropylene alkyl ether of integer.
This chemical conditioner more than preferably 20 DEG C and less than 60 DEG C, more preferably 20 DEG C less than
The dewatering efficiency of the lime mud in a low temperature of 55 DEG C is excellent.
From the viewpoint of the dewatering efficiency of the lime mud improved above-mentioned low temperature, the chemical conditioner of which
Preferably m is the integer of 7～9 and integer that n is 2～4.From the viewpoint of identical, the total (m of m and n
+ n) it is preferably 9～13.It addition, from the viewpoint of identical, the ratio (m/m+ of the summation of m with m and n
N) preferably 0.55～0.95, more preferably 0.60～0.90, and then preferably 0.60～0.85, more excellent
Elect 0.65～0.80 as.From the viewpoint of identical, R1It is preferably the branched alkyl of carbon number 12～16.
The chemical conditioner ＞ of ＜ the 2nd mode
The chemical conditioner of the 2nd mode is the polyoxyethylene polyoxypropylene alkyl represented by aforementioned formula (1)
The R of ether1It is 6～9 for integer, n that the straight chain of carbon number 10～18 and/or branched alkyl, m are 1～3
The polyoxyethylene polyoxypropylene alkyl ether of integer.
This chemical conditioner more than preferably 50 DEG C and less than 85 DEG C, more preferably more than 55 DEG C and 85 DEG C with
The dewatering efficiency of the lime mud under the high temperature of lower left and right is excellent.
From the viewpoint of the dewatering efficiency of the lime mud improved above-mentioned high temperature, the chemical conditioner of which
Preferably m is the integer of 1～2 and integer that n is 7～8.From the viewpoint of identical, the total (m of m and n
+ n) it is preferably 8～11, more preferably 9～11.It addition, from the viewpoint of identical, m's Yu m and n
The ratio (m/m+n) of summation be preferably 0.05～0.40, more preferably 0.08～0.35, so preferably 0.10～
0.30, more preferably 0.11～0.23.
[dewatering of lime mud]
Then, for employing the dewatering of the lime mud of aforementioned chemical conditioner, illustrate.
The dewatering of the lime mud of the present invention includes: the dehydration adding aforementioned lime mud in lime mud helps
The operation of agent.
Hereinafter, the preferred mode of dewatering for the lime mud of the present invention illustrates.
Interpolation operation ＞ of ＜ chemical conditioner
The dewatering of this lime mud includes: generate in the causticization operation in paper and/or pulp manufacture is severe
Change the operation of the chemical conditioner adding aforementioned lime mud in mud.
Causticization operation in this paper and/or pulp manufacture is preferably the causticization operation during kraft pulp manufactures.
As the interpolation position of chemical conditioner, at following 1 or at 2 more than: will green liquor put into
The lime mud slurry transportation of quick lime carries in pipe arrangement to the sludge filtration device of sludge filtration device
The inlet portion of pump, pump export；Being used for set by the midway of sludge filtration device conveying pipe arrangement preserves lime mud
The lime mud tank of mud, the mud acceptance pool of sludge filtration device；The shower water of sludge filtration device.More preferably
The inlet portion of the pump added to sludge filtration device conveying pipe arrangement and the one of the shower water of sludge filtration device
Person or both, more preferably add the inlet portion of pump to sludge filtration device conveying pipe arrangement or sludge filtration device
Shower water in.It addition, from the viewpoint of being more effectively carried out dehydration, more preferably by chemical conditioner extremely
Add to the shower water of sludge filtration device less, for example, it is preferable to the total amount of chemical conditioner is added to sludge
In the shower water of filter.
It should be noted that in this specification, " paper and/or pulp manufacture " refers to " paper manufacture and paper pulp
Any one or both manufactured ".
The addition of chemical conditioner is not affected by solid component concentration, the particle diameter of lime mud, relative to severe
Change mud mud, preferably 10～1000mg/L, more preferably 50～500mg/L, and then preferably 50～
300mg/L, and then more preferably 50～200mg/L.
It addition, the addition of chemical conditioner is relative to the solid constituent of lime mud mud, preferably 30～
10000mg/kg, more preferably 30～6000mg/kg, and then preferably 30～2800mg/kg.
Chemical conditioner can carry out stock solution interpolation, as desired alternatively, it is also possible to add with solvent dilution
Add.In the case of adding with solvent dilution, solvent is preferably water.It addition, by chemical conditioner solvent
The content of the chemical conditioner in the diluent of dilution is preferably 1000～50000mg/L, more preferably
3000～20000mg/L, and then preferably 5000～10000mg/L.
It should be noted that the solid component concentration of lime mud generated in causticization operation be usually 250～
About 450g/L, it addition, mean diameter is in terms of number is distributed, usually about 1～5 μm.
(kind of dehydrant)
That generate in causticization operation in paper and/or pulp manufacture, more than 20 DEG C and the causticization of less than 60 DEG C
Mud preferably adds the chemical conditioner of the lime mud of aforesaid 1st mode.Thus, such low temperature is severe
The dewatering efficiency changing mud improves.
It addition, causticization operation in paper and/or pulp manufacture generates, more than 50 DEG C and less than 85 DEG C
Lime mud in preferably add the chemical conditioner of lime mud of aforesaid 2nd mode.Thus, such high temperature
Lime mud dewatering efficiency improve.
So, by optimal chemical conditioner is selected at each scene that temperature conditions is different respectively, it is possible to
Reduce the moisture content of dewatered cake well.
＜ dehydration procedure ＞
In this dehydration procedure, the lime mud mud that with the addition of chemical conditioner in aforementioned interpolation operation is carried out
It is dehydrated and obtains dewatered cake.
The moisture content of the dewatered cake so obtained is low.Therefore, in order to this dewatered cake is made for over dry
Heat required for state reduces, thus compared with the conventional method, it is possible to the heavy oil cutting down limekiln uses
Amount.It addition, by reducing by the moisture that carries of dewatered cake, the temperature in limekiln rises, therefore, it is possible to
Improve lime-roasting degree.Further, make the minimizing of carrying of alkali by carrying the minimizing of moisture, therefore can
Enough alleviate the back-up ring (dam ring) of kiln.It addition, because decrease the moisture of dewatered cake, so alleviating
The risk that equipment blocks, the number of times of cleaning decreases.
One mode ＞ of the dewatering of ＜ lime mud
One mode of the dewatering of lime mud includes: temperature measuring operation: to paper and/or pulp manufacture
In causticization operation in the temperature of lime mud that generates be measured；The selection operation of chemical conditioner: front
State the temperature of lime mud be 20 DEG C less than 50 DEG C time select the chemical conditioner of aforesaid 1st mode,
Temperature at aforementioned lime mud is to select the dehydration of aforesaid 1st mode to help when more than 50 DEG C and less than 60 DEG C
At least one of the chemical conditioner of agent and aforesaid 2nd mode, the temperature at aforementioned lime mud exceedes
The chemical conditioner of aforementioned 2nd mode is selected when 60 DEG C and less than 85 DEG C；Add the operation of chemical conditioner: to
Aforementioned lime mud adds the operation of selected chemical conditioner；And dehydration procedure: aforementioned de-to the addition of
The lime mud of water auxiliary agent carries out being dehydrated and obtaining dewatered cake.
So, by optimal chemical conditioner is selected at each scene that temperature conditions is different respectively, it is possible to
Reduce the moisture content of dewatered cake well.
Embodiment
Then, by embodiment, the present invention is illustrated in further detail, but the present invention is not by these
The restriction of example.
[chemical conditioner]
As chemical conditioner, use the 1st table, the 2nd table and the chemical conditioner of the composition shown in the 3rd table.That is,
As chemical conditioner, using R1, m and n in aforementioned formula (1) is shown in the 1st table, the 2nd table and the 3rd table
The chemical conditioner of composition.
[table 1]
1st table
[table 2]
2nd table
[table 3]
3rd table
[lime mud mud]
As lime mud mud, use is not added reagent by the causticization operation collection at certain paper workshop processed
Lime mud mud.Use pure water, solid component concentration is adjusted to flow into the acceptance of real machine lime mud filter
The concentration in pond, i.e. 36g/L.
[embodiment 1-1]
Lime mud mud polyethylene bottle is gathered 50mL, till being heated to set point of temperature (30 DEG C).Xiang Qi
The chemical conditioner of middle interpolation ormal weight (200mg/L), and be sufficiently mixed and make it become uniform.For mixing
Mud total amount nutsch filter (maximum suction pressure :-0.095MPa) sucking filtration 60 seconds.
Take out the dewatered cake total amount after filtering, dissolve to become uniform in the bag with fixture.From it
Middle collection about 5g, and measure weight in wet base (Ww)。
Afterwards, it is dried more than 12 hours in the exsiccator of 105 DEG C, after cooling, measures dry weight (Wd).Logical
Cross the moisture content that following formula is obtained in dewatered cake.
Moisture content (quality %)=[(W in dewatered cakew-Wd)/Ww]×100
Moisture content in dewatered cake is shown in the 4th table.
[embodiment 1-2～1-4]
In embodiment 1-2,1-3 and 1-4, the lime mud mud gathered in polyethylene bottle is separately heated to
Till 50 DEG C (embodiment 1-2), 60 DEG C (embodiments 1-3) and 80 DEG C (embodiment 1-4), in addition, carry out
Operation as embodiment 1-1.Moisture content in dewatered cake is shown in the 4th table.
[embodiment 2-1～14-4]
In embodiment 2-1～14-4, kind and the heating-up temperature of dehydrant are arranged as shown in the 4th table,
In addition, the operation as embodiment 1-1 is carried out.Moisture content in dewatered cake is shown in the 4th table.
[comparative example 1-1～1-4]
Comparative example 1-1～1-4 do not use dehydrant, in addition, carry out respectively with embodiment 1-1～
The operation that 1-4 is same.Moisture content in dewatered cake is shown in the 4th table.
[table 4]
4th table
The heating-up temperature of (* 1) causticization mud.
From embodiment 1-1～14-4 and the comparison of comparative example 1-1～1-4, by adding dehydrant
No.1～14, shows suitable dehydrating effect.
Dehydrant No.1～3 shows dehydrating effect preferably, and dehydrant at low-temperature region
No.4～7 shows suitable dehydrating effect at high-temperature area.
[embodiment 15,16 and comparative example 2]
Then, in order to the difference being added the dehydrating effect that position difference causes by dehydrant is commented
Valency, has carried out following test.As dehydrant by the dehydrant NO.3 of table 1 with 100mg/L-mud weight
Amount adds inlet portion (embodiment 15) or the spray of sludge filtration device of the pump to sludge filtration device conveying pipe arrangement
In trickle (embodiment 16).As comparative example 2, during for not adding dehydrant, enter similarly
Row test.Show the result in the 5th table.
[table 5]
5th table
As shown in the 5th table, it is known that the dehydrant of the present invention adds the pump to sludge filtration device conveying pipe arrangement
Inlet portion (embodiment 15) and sludge filtration device shower water (embodiment 16) any one in all given play to
Excellent dehydrating effect.It addition, understand compared to being added directly in mud, dehydrant will be with the addition of
Shower water adds to mud, it is possible to given play to more excellent dehydrating effect.
Industrial applicability
The chemical conditioner of the present invention and use its lime mud dewatering can efficiency the most right
Lime mud is dehydrated, therefore, it is possible to the dehydration in the causticization operation being suitable as in paper and/or pulp manufacture
Auxiliary agent and use.
Claims (8)
1. a chemical conditioner for lime mud, it comprises the polyoxyethylene represented by following formula (1) and gathers
Oxygen propylidene alkyl ether:
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)
R in formula (1)1Represent the straight chain of carbon number 12～16 and/or branched alkyl, m represent 7～9 whole
Number, n represents the integer of 1～4.
2. a dewatering for lime mud, comprising: the causticization operation in paper and/or pulp manufacture
Middle generation, more than 20 DEG C and less than 60 DEG C lime mud adds lime mud described in claim 1
The operation of chemical conditioner.
3. a dewatering for lime mud, comprising:
Temperature measuring operation: the temperature to the lime mud generated in the causticization operation in paper and/or pulp manufacture
It is measured；
The selection operation of chemical conditioner: the temperature at described lime mud is 20 DEG C and selects less than when 50 DEG C
Select and comprise R in following formula (1)1Represent that the straight chain of carbon number 12～16 and/or branched alkyl, m represent
The integer of 7～9, n represent the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of the integer of 1～4
Chemical conditioner,
Select when the temperature of described lime mud is more than 50 DEG C and less than 60 DEG C to comprise R in formula (1)1Table
Show the straight chain of carbon number 12～16 and/or branched alkyl, m represent 7～9 integer, n represent 1～4
The chemical conditioner of the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of integer and comprising in formula (1)
R1Represent the straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～3 integer, n represent 6～
At least one of the chemical conditioner of the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of the integer of 9,
Select when the temperature of described lime mud is more than 60 DEG C and less than 85 DEG C to comprise R in formula (1)1Represent
The straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～3 integer, n represent 6～9 whole
The chemical conditioner of the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of number,
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)；
Add the operation of chemical conditioner: in described lime mud, add the operation of selected chemical conditioner；
With
Dehydration procedure: the lime mud that with the addition of described chemical conditioner is dehydrated and obtains dewatered cake.
4., according to the dewatering of the lime mud described in Claims 2 or 3, it is to paper and/or paper pulp system
The lime mud generated in the causticization operation made carries out the method being dehydrated, comprising: by following arbitrary causticization
The chemical conditioner of mud adds the operation of the inlet portion of the pump to sludge filtration device conveying pipe arrangement,
Comprise R in following formula (1)1Represent that the straight chain of carbon number 10～18 and/or branched alkyl, m represent
The integer of 1～10, n represent the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of the integer of 1～10
Chemical conditioner；
Comprise R in formula (1)1Represent that the straight chain of carbon number 12～16 and/or branched alkyl, m represent 7～9
Integer, n represent 1～4 the dehydration of lime mud of polyoxyethylene polyoxypropylene alkyl ether of integer
Auxiliary agent；And
Comprise R in formula (1)1Represent that the straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～3
Integer, n represent 6～9 the dehydration of lime mud of polyoxyethylene polyoxypropylene alkyl ether of integer
Auxiliary agent,
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)。
5., according to the dewatering of the lime mud described in Claims 2 or 3, it is to paper and/or paper pulp system
The lime mud generated in the causticization operation made carries out the method being dehydrated, comprising: by following arbitrary causticization
The chemical conditioner of mud adds the operation to the shower water of sludge filtration device,
Comprise R in following formula (1)1Represent that the straight chain of carbon number 10～18 and/or branched alkyl, m represent
The integer of 1～10, n represent the lime mud of the polyoxyethylene polyoxypropylene alkyl ether of the integer of 1～10
Chemical conditioner；
Comprise R in formula (1)1Represent that the straight chain of carbon number 12～16 and/or branched alkyl, m represent 7～9
Integer, n represent 1～4 the dehydration of lime mud of polyoxyethylene polyoxypropylene alkyl ether of integer
Auxiliary agent；And
Comprise R in formula (1)1Represent that the straight chain of carbon number 10～18 and/or branched alkyl, m represent 1～3
Integer, n represent 6～9 the dehydration of lime mud of polyoxyethylene polyoxypropylene alkyl ether of integer
Auxiliary agent,
R1O〔CH2CH(CH3)O〕m〔CH2CH2O〕nH…(1)。
6. according to the dewatering of the lime mud described in Claims 2 or 3, wherein, paper and/or paper pulp system
The causticization operation made is the causticization operation during kraft pulp manufactures.
The dewatering of lime mud the most according to claim 4, wherein, in paper and/or pulp manufacture
Causticization operation be kraft pulp manufacture in causticization operation.
The dewatering of lime mud the most according to claim 5, wherein, in paper and/or pulp manufacture
Causticization operation be kraft pulp manufacture in causticization operation.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013092777 | 2013-04-25 | ||
| JP2013-092777 | 2013-04-25 | ||
| JP2014-044751 | 2014-03-07 | ||
| JP2014044751A JP5846234B2 (en) | 2013-04-25 | 2014-03-07 | Lime mud dewatering aid and lime mud dewatering method using the same |
| PCT/JP2014/059850 WO2014175035A1 (en) | 2013-04-25 | 2014-04-03 | Aid for dewatering lime mud and method for dewatering lime mud using said aid |
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| CN105143116A CN105143116A (en) | 2015-12-09 |
| CN105143116B true CN105143116B (en) | 2016-08-31 |
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| CN201480023030.2A Active CN105143116B (en) | 2013-04-25 | 2014-04-03 | The chemical conditioner of lime mud and use its dewatering of lime mud |
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| Country | Link |
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| JP (1) | JP5846234B2 (en) |
| CN (1) | CN105143116B (en) |
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| CN112939418B (en) * | 2021-01-27 | 2022-11-01 | 重庆四季金标科技有限公司 | Sludge dewatering additive and using method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037319A (en) * | 1988-05-07 | 1989-11-22 | 山西省师范大学 | The method of comprehensive utilization of urao |
| CN1063664A (en) * | 1991-04-11 | 1992-08-19 | 青岛碱厂 | A kind of method of washing heavy sodium hydrate filter cake |
| CN102112208A (en) * | 2008-06-20 | 2011-06-29 | 碳工程合伙有限公司 | Carbon dioxide capture |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4562159B2 (en) * | 2001-03-08 | 2010-10-13 | 伯東株式会社 | How to dehydrate lime mud |
| JP2003340500A (en) * | 2002-05-29 | 2003-12-02 | Katayama Chem Works Co Ltd | Dehydration accelerator for calcium carbonate slurry |
| JP4168156B2 (en) * | 2003-01-08 | 2008-10-22 | 株式会社片山化学工業研究所 | Accelerating dehydration of calcium carbonate slurry |
| JP4998982B2 (en) * | 2006-08-07 | 2012-08-15 | 株式会社タイホーコーザイ | Lime mud dehydration accelerator |
| JP2010058072A (en) * | 2008-09-05 | 2010-03-18 | Hakuto Co Ltd | Dehydration accelerator of lime sludge and dehydration acceleration method of lime sludge using the same |
| JP2012091072A (en) * | 2010-10-22 | 2012-05-17 | Hakuto Co Ltd | Dehydration accelerator of lime sludge |
-
2014
- 2014-03-07 JP JP2014044751A patent/JP5846234B2/en active Active
- 2014-04-03 CN CN201480023030.2A patent/CN105143116B/en active Active
- 2014-04-03 WO PCT/JP2014/059850 patent/WO2014175035A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1037319A (en) * | 1988-05-07 | 1989-11-22 | 山西省师范大学 | The method of comprehensive utilization of urao |
| CN1063664A (en) * | 1991-04-11 | 1992-08-19 | 青岛碱厂 | A kind of method of washing heavy sodium hydrate filter cake |
| CN102112208A (en) * | 2008-06-20 | 2011-06-29 | 碳工程合伙有限公司 | Carbon dioxide capture |
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| Publication number | Publication date |
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| JP5846234B2 (en) | 2016-01-20 |
| JP2014224029A (en) | 2014-12-04 |
| CN105143116A (en) | 2015-12-09 |
| WO2014175035A1 (en) | 2014-10-30 |
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