CN104404804A - Chemical pulp or dissolving pulp preparation method and experimental displacement steaming and cooking device thereof - Google Patents
Chemical pulp or dissolving pulp preparation method and experimental displacement steaming and cooking device thereof Download PDFInfo
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- CN104404804A CN104404804A CN201410564058.9A CN201410564058A CN104404804A CN 104404804 A CN104404804 A CN 104404804A CN 201410564058 A CN201410564058 A CN 201410564058A CN 104404804 A CN104404804 A CN 104404804A
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- 238000010411 cooking Methods 0.000 title claims abstract description 66
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 66
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229920000875 Dissolving pulp Polymers 0.000 title claims abstract description 12
- 229920001131 Pulp (paper) Polymers 0.000 title claims abstract description 8
- 238000010025 steaming Methods 0.000 title abstract description 9
- 239000007788 liquid Substances 0.000 claims abstract description 208
- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 238000005406 washing Methods 0.000 claims abstract description 47
- 239000002994 raw material Substances 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 238000009835 boiling Methods 0.000 claims description 131
- 238000010792 warming Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 229910001220 stainless steel Inorganic materials 0.000 claims description 9
- 239000010935 stainless steel Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 7
- 239000007921 spray Substances 0.000 claims description 7
- 102100030386 Granzyme A Human genes 0.000 claims description 6
- 101001009599 Homo sapiens Granzyme A Proteins 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000010802 sludge Substances 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 4
- 238000006386 neutralization reaction Methods 0.000 claims description 3
- 230000007306 turnover Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004537 pulping Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 3
- 239000003814 drug Substances 0.000 abstract 3
- 229940079593 drug Drugs 0.000 abstract 3
- 230000008569 process Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000002474 experimental method Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 238000013022 venting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 108010068370 Glutens Proteins 0.000 description 1
- 241000192783 Hakea sericea Species 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 235000021312 gluten Nutrition 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005649 metathesis reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
-
- 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
- D21C7/00—Digesters
-
- 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
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
-
- 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
- D21C7/00—Digesters
- D21C7/12—Devices for regulating or controlling
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- Paper (AREA)
Abstract
The invention discloses a chemical pulp or dissolving pulp preparation method and an experimental displacement steaming and cooking device thereof; the experimental displacement steaming and cooking device comprises a steaming and cooking unit, a hot white liquid tank, a hot black liquid tank, a warm black liquid tank, a washing liquid tank, a circulating pump, a drug liquid pump, a heating rod, a steam generator, a flow meter, and a DCS operating system. The hot white liquid tank, the hot black liquid tank, the warm black liquid tank and the washing liquid tank are connected in parallel to the steaming and cooking unit and the steam generator and adopt a liquid pumping pipeline, a liquid inlet pipeline and a steam pipeline in common; the heating rod is mounted on a drug liquid circulation pipeline of the steaming and cooking unit; the flow meter is mounted on a main pipeline for going into and out of the steaming and cooking unit; the DCS operating system can real-timely display liquid levels, temperatures and pressures of the tanks and can control opening and closing of the drug liquid pump, the circulating pump and the heating rod. The device has the advantages of reasonable structure, convenient use, simple preparation process, and high degree of automation, and can perform displacement steaming and cooking simulation on any pulping raw material.
Description
Technical field
The present invention relates to papermaking and experimental provision thereof, particularly relate to a kind of chemical pulp or dissolving pulp preparation method and test-type displacement cooking device thereof.
Background technology
Along with the continuous expansion of scope of the enterprise from now on and the continuous extension of industrial chain, energy resource consumption and gross contamination emission will increase to some extent, traditional enterprises in pulp and paper industry lacks key technology and the core competitiveness of energy-saving and emission-reduction, propulsion energy-saving reduces discharging the restriction that more and more will be subject to technical bottleneck from now on, want to occupy a tiny space in strict environmental regulation and fierce market competition, pulp and paper technology just must complete the target of the energy-saving and emission-reduction of country.Current China paper industry has entered the fast traffic lane of low consumption, low stain, low emission, but really realizes the target of low consumption, low stain, low emission, also needs to promote a large amount of advanced technology and equipment.The displacement cooking technology released in recent years, obtains the extensive accreditation in market.
Displacement cooking technology is a kind of energy-conservation vertical pot batch cooking pulping process, it has lot of advantages, wherein by the metathesis of digestion process herb liquid, and the heat energy of pot and chemicals in reuse, steam saving is the great advantage of displacement cooking, and energy consumption is about 1/3 of conventional boil mode.In addition, displacement cooking more easily increases production capacity, the project of production capacity below 200,000 tons, adopts the investment of displacement cooking low, increases production capacity further easier; The production capacity of displacement cooking is relatively stable, adopts the production line of digester composition arranged side by side, when there being a pot to go wrong, and an influential system part production capacity; Displacement cooking dress pot is simple, only can complete the operation of dress pot with belt dress pot and stuff level switch, not need the wood chip metering system that supporting accuracy is high; There is not the obstructing problem of sieve plate in displacement cooking, after displacement cooking completes the operation in each stage, capital starts circulating pump, change the fluid passage of displacement cooking on the one hand, the temperature of each point in even digester, sieve plate is reclaimed in recoil on the other hand, and reverse cleaning is blocked in " faller gill " that reclaim in sieve plate; Displacement cooking is the boiling mode of environmental protection close friend, and the sulphidity of displacement cooking is low, little to equipment corrosion, and foul smell amount is few, and the sulphidity of continuously cooking is 25-30%, and the sulphidity of displacement cooking is 18%; Displacement cooking running and comparing is flexible, and displacement cooking can feed change and slurry kind, displacement cooking can in turn with simultaneously with different digester boiling needlebushs, leaf wood and bamboo, each pot has independently formula table, not by the impact of other pots; Displacement cooking is to the strong adaptability of chip quality, especially domestic material quality is adapted to poor, fluctuation is frequent, the situation that qualification rate is low, adopt raw material classification boiling, different types of raw material is placed in different digesters, uses different digesting technoloy to carry out boiling simultaneously, play the advantage of various raw material, therefore displacement cooking more can adapt to domestic Raw Materials Situation; Displacement cooking system can also be changed the line of production dissolving pulp easily.
Patent CN203307658 discloses a kind of electric heating displacement cooking pot, this equipment arranges the entrance of a connection liquid circulating pump at bottom of pot body, gradation can be realized in theory and add cooking liquor, improve the efficiency of heating surface, extension device service life, improve cooking effect, but need quantitatively to add in displacement cooking process quantitatively to extract liquid out, and need to keep full fluid level condition in pot, said apparatus is difficult to realize, and does not introduce exchange system.
Patent CN202482686 discloses a kind of pulping and digesting equipment with inner-outer circulation function; this equipment is mainly steaming plant; exchange system is not introduced; during employing plunger displacement pump Inner eycle, liquid is sent into by extraction bottom, top; easy appearance local cutout dry tap phenomenon; the measure of heater unprotect, when there is local cutout in pipeline, easy dry combustion method damages.
The technique of displacement cooking is the key factor realizing through engineering approaches, the complete equipment for displacement cooking experiment is not had due to domestic, cannot further investigate chemical reaction Changing Pattern in displacement cooking and technical process code by experiment, displacement cooking systematic research is mainly based on technology introduction and summary.Existing experimental provision is difficult to simulation cooking liquor replacement process, be difficult to the demand meeting displacement cooking experiment, and the cost price using displacement cooking device to carry out testing in factory is too high, be difficult to realize, therefore, need to develop a kind of use for laboratory displacement cooking device, to meet the demand of carrying out replacing and digesting technoloy experiment.
Summary of the invention
The object of the invention is to the shortcoming and defect overcoming above-mentioned prior art, a kind of chemical pulp or dissolving pulp preparation method and test-type displacement cooking device thereof are provided.Solve in prior art the demand being difficult to meet displacement cooking experiment, and the cost price using displacement cooking device to carry out testing in factory is too high, is difficult to the technical problem realized.
The present invention is achieved through the following technical solutions:
A kind of test-type displacement cooking device, comprises boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5, steam generator 10, DCS operating system 11, it is characterized in that:
The top liquid mouth of boiling vessel 1 is communicated with by main steam range with between steam generator 10; The interface end of main steam range and boiling vessel 1 top liquid mouth is provided with valve A, and the interface end of main steam range and steam generator 10 is provided with valve D;
The respective inlet of the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 has two interfaces, and one of them interface is communicated with feed liquor house steward by liquid feed valve 16, and another interface is communicated with main steam range by steam valve 18; Feed liquor house steward is communicated with the top liquid mouth of boiling vessel 1 by valve B;
The respective liquid outlet of white liquid bath 2, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 is all communicated with drawing liquid house steward by liquid valve 19, and total interface of drawing liquid house steward is communicated with the bottom liquid mouth of boiling vessel 1 successively by sludge filter device 21, spray pump 7, flowmeter 9;
The top liquid mouth of boiling vessel 1 and the pipeline of bottom liquid mouth are provided with valve C, heating rod 8, circulating pump 6 successively;
The inner bottom part of boiling vessel 1 is equipped with liquid distribution plate 102, and liquid distributing umbrella 103 is equipped with at top;
Dismountable seam type sieve plate 104 is equipped with at bottom the Inner bucket 101 of boiling vessel 1 and top.
Described DCS operating system 11 shows the liquid level of boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5 in real time, and temperature, pressure also controls spray pump 7, the switch of circulating pump 6 and heating rod 8.
The top of the white liquid bath of described heat 2, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 is all provided with pressure sensor 15, safety valve 14, exhaust-valve 17.
The side of the white liquid bath 2 of described boiling vessel 1, heat, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5 is provided with liquid level sensor 12, temperature sensor 13.
Blowoff valve 20 is installed in the bottom of the white liquid bath of described heat 2, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5.
Described liquid level sensor 12 is magnetic turnover plate type liquid level sensor; Described temperature sensor 13 is RTD stainless steel temperature sensor.
The white liquid bath 2 of described boiling vessel 1, heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 material are two phase stainless steel.
Described boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 outer wall is all surrounded by heat-insulation layer.
Described circulating pump 6 is two phase stainless steel magnetic drive pump.
Described flowmeter 9 is ultrasonic flowmeter; Described steam generator 10 is electrical heating type steam generator; Described heating rod 8 is with anti-dry protection system.
The method of above-mentioned test-type displacement cooking device preparative chemistry slurry or dissolving pulp is as follows:
The preparation of chemical pulp
(1) preparatory stage: start steam generator 10, produce steam, then the white liquid bath 2 of heat is opened, hot black liquor groove 3, warm black liquor slot 4, the steam valve 18 on washing liquid bath 5 top, pass into steam, the liquid in white for heat liquid bath 2 is warming up to 160 DEG C, the liquid of hot black liquor groove 3 is warming up to 160 DEG C, the liquid of temperature black liquor slot 4 is warming up to 120 DEG C, and the liquid of washing liquid bath 5 is warming up to 70 DEG C;
(2) pot is filled: taken out by the Inner bucket 101 of boiling vessel 1, according to the corresponding sieve plate 104 of the feature selecting of raw material, add about 600g over dry raw material and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel 1, and install liquid distributing umbrella 103, then pot cover 105 is installed;
(3) presteaming: the steam valve opening boiling vessel 1 top, passes into steam, is heated to about 100 DEG C, the air in removing raw material;
(4) temperature is filled: pump into about 4L temperature black liquor and boiling vessel 1 is full of by the white liquid of 2L heat, then in boiling vessel 1, steam is passed into, be heated to 120 DEG C, ON cycle pump 6 and heating rod 8, be set to Automatic-heating state, when the temperature in boiling vessel 1 is lower than preset value, heating rod 8 meeting Automatic-heating, makes boiling vessel 1 be incubated 30min;
(5) heat is filled: pump into about 4L hot black liquor and the white liquid of 2L heat to boiling vessel 1, black liquor original in boiling vessel 1 is gone out to send into warm black liquor slot 4 from boiling vessel 1 upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward digester 1 and be warming up to 160 DEG C, insulation 60min, or determine reaction terminating according to the H factor that DCS operating system 11 calculates, ON cycle pump 6 and heating rod 8 simultaneously, be set to Automatic-heating state, when the temperature in digester 1 is lower than preset value, heating rod meeting automatic operation;
(7) displacement washing: after boiling stops, pump into the cleaning solution of a certain amount of about 6L to boiling vessel 1, the black liquor of the temperature cemented out higher (120-160 DEG C) first enters hot black liquor groove 3, and the black liquor of temperature lower (<120 DEG C) enters warm black liquor slot 4;
(8) discharging: remaining gas in boiling vessel 1 is discharged, until when pressure reduces to 0Pa, the pot cover 105 unloading boiling vessel 1 takes out the mixture in boiling vessel 1;
The preparation process of dissolving pulp is as follows:
(1) preparatory stage: start steam generator 10, produce steam, then the white liquid bath 2 of heat is opened, hot black liquor groove 3, warm black liquor slot 4, the steam valve 18 on washing liquid bath 5 top, pass into steam, the liquid in white liquid bath 2 is warming up to 160 DEG C, and the liquid in hot black liquor groove 3 is warming up to 160 DEG C, liquid in temperature black liquor slot 4 is warming up to 120 DEG C, and the liquid in washing liquid bath 5 is warming up to 70 DEG C;
(2) pot is filled: taken out by the Inner bucket 101 of boiling vessel 1 inside, according to the corresponding sieve plate 104 of the feature selecting of raw material, add 600g over dry raw material and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel 1, and install liquid distributing umbrella 103, then pot cover 105 is installed;
(3) presteaming: the steam valve 18 opening boiling vessel 1 top, passes into steam, is heated to about 160 DEG C, insulation 1h, or determines reaction terminating according to the P factor that DCS operating system 11 calculates;
(4) neutralization reaction: pump into about 2L hot black liquor and the white liquid of 2L heat to boiling vessel 1, ON cycle pump 6 circulates 10min;
(5) heat is filled: pump into about 4L hot black liquor and the white liquid of 2L heat to boiling vessel 1, black liquor original in boiling vessel 1 is gone out to send into warm black liquor slot 4 from boiling vessel 1 upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward digester 1 and be warming up to 160 DEG C, be incubated about 60min, or determine reaction terminating according to the H factor that DCS operating system 11 calculates, ON cycle pump 6 and heating rod 8 simultaneously, be set to Automatic-heating state, when the temperature in pot is lower than preset value, heating rod automatic operation;
(7) displacement washing: after boiling stops, pump into the cleaning solution of a certain amount of (about 6L) to boiling vessel 1, the black liquor of the temperature cemented out higher (120-160 DEG C) first enters hot black liquor groove 3, and the black liquor of temperature lower (<120 DEG C) enters warm black liquor slot 4;
(8) discharging: discharged by remaining gas in boiling vessel 1, until when pressure reduces to 0Pa, unloads pot cover 105 and takes out mixture in boiling vessel 1.
The present invention, relative to prior art, has following advantage and effect:
Test-type displacement cooking device of the present invention, form according to displacement cooking principle design, by four displacement tank (the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5), realize the displacement of different temperatures black liquor, each displacement tank all can pass into steam and heat liquid, and ultrasonic flow takes into account magnetic turning plate type flowmeters can accurate response flow and liquid level at high temperature under high pressure.
Technical measure is simple and easy to do, and it is rational in infrastructure, easy to use, employs liquid distributor and sieve plate, is conducive to being uniformly distributed of liquid, can carry out displacement cooking simulation to any raw material.In addition, can also be used as Conventional upright circulation digester and use, also can carry out presteaming, prehydrolysis is tested.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is boiling vessel structural representation.
Fig. 3 is liquid distribution plate structural representation.
Fig. 4 is A-A cross-sectional view in Fig. 3.
Fig. 5 is liquid distributing umbrella structural representation.
Fig. 6 is another view structure schematic diagram of liquid distributing umbrella.
Fig. 7 is sieve-plate structure schematic diagram.
In figure, the corresponding name of each numbering is called: 1-boiling vessel; The white liquid bath of 2-heat; 3-temperature black liquor slot; 4-hot black liquor groove; 5-washs liquid bath; 6-circulating pump; 7-spray pump; 8-heating rod; 9-flowmeter; 10-steam generator; 11-DCS operating system; 12-liquid level sensor; 13-temperature sensor; 14-pressure sensor; 15-safety valve; 16-liquid feed valve; 17-exhaust-valve; 18-steam valve; 19-liquid valve; 20-blowoff valve; 21-sludge filter device; 101-Inner bucket; 102-liquid distribution plate; 1021-liquid distribution plate hole; 103-liquid distributing umbrella; 1031-liquid distributing umbrella hole; 1032-screw thread; 104-sieve plate; 1041-sieves seam; 105 pot covers.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is more specifically described in detail.
Embodiment
As shown in Fig. 1-6.A kind of test-type displacement cooking of the present invention device, comprises boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5, steam generator 10, DCS operating system 11;
The top liquid mouth of boiling vessel 1 is communicated with by main steam range with between steam generator 10; The interface end of main steam range and boiling vessel 1 top liquid mouth is provided with valve A, and the interface end of main steam range and steam generator 10 is provided with valve D;
The respective inlet of the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 has two interfaces, and one of them interface is communicated with feed liquor house steward by liquid feed valve 16, and another interface is communicated with main steam range by steam valve 18; Feed liquor house steward is communicated with the top liquid mouth of boiling vessel 1 by valve B;
The respective liquid outlet of white liquid bath 2, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 is all communicated with drawing liquid house steward by liquid valve 19, and total interface of drawing liquid house steward is communicated with the bottom liquid mouth of boiling vessel 1 successively by sludge filter device 21, spray pump 7, flowmeter 9;
The top liquid mouth of boiling vessel 1 and the pipeline of bottom liquid mouth are provided with valve C, heating rod 8, circulating pump 6 successively;
The inner bottom part of boiling vessel 1 is equipped with liquid distribution plate 102, and liquid distributing umbrella 103 is equipped with at top;
Dismountable seam type sieve plate 104 is equipped with at bottom the Inner bucket 101 of boiling vessel 1 and top.
Described DCS operating system 11 shows the liquid level of boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5 in real time, and temperature, pressure also controls spray pump 7, the switch of circulating pump 6 and heating rod 8.
The top of the white liquid bath of described heat 2, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 is all provided with pressure sensor 15, safety valve 14, exhaust-valve 17.
The side of the white liquid bath 2 of described boiling vessel 1, heat, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5 is provided with liquid level sensor 12, temperature sensor 13.
Blowoff valve 20 is installed in the bottom of the white liquid bath of described heat 2, hot black liquor groove 3, warm black liquor slot 4 and washing liquid bath 5.
Described liquid level sensor 12 is magnetic turnover plate type liquid level sensor; Described temperature sensor 13 is RTD stainless steel temperature sensor.
The white liquid bath 2 of described boiling vessel 1, heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 material are two phase stainless steel.
Described boiling vessel 1, the white liquid bath 2 of heat, hot black liquor groove 3, warm black liquor slot 4, washing liquid bath 5 outer wall is all surrounded by heat-insulation layer.
Described circulating pump 6 is two phase stainless steel magnetic drive pump.
Described flowmeter 9 is ultrasonic flowmeter; Described steam generator 10 is electrical heating type steam generator; Described heating rod 8 is with anti-dry protection system.
The method of above-mentioned test-type displacement cooking device preparative chemistry slurry or dissolving pulp is adopted to realize by following steps:
Preparation (the conventional displacement cooking preparation) step of chemical pulp is as follows:
(1) preparatory stage: start steam generator 10, produce steam, then the white liquid bath 2 of heat is opened, hot black liquor groove 3, warm black liquor slot 4, the steam valve 18 on washing liquid bath 5 top, pass into steam, the liquid in white for heat liquid bath 2 is warming up to 160 DEG C, the liquid of hot black liquor groove 3 is warming up to 160 DEG C, the liquid of temperature black liquor slot 4 is warming up to 120 DEG C, and the liquid of washing liquid bath 5 is warming up to 70 DEG C;
(2) pot is filled: taken out by the Inner bucket 101 of boiling vessel 1, according to the corresponding sieve plate 104 of the feature selecting of raw material, add about 600g over dry raw material (different depending on raw material different quality) and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel 1, and install liquid distributing umbrella 103, then pot cover 105 is installed;
(3) presteaming: the steam valve opening boiling vessel 1 top, passes into steam, is heated to about 100 DEG C, the air in removing raw material;
(4) temperature is filled: pump into about 4L temperature black liquor and boiling vessel 1 is full of by the white liquid of 2L heat, then in boiling vessel 1, steam is passed into, be heated to 120 DEG C, ON cycle pump 6 and heating rod 8, be set to Automatic-heating state, when the temperature in boiling vessel 1 is lower than preset value, heating rod 8 meeting Automatic-heating, makes boiling vessel 1 be incubated 30min;
(5) heat is filled: pump into about 4L hot black liquor and the white liquid of 2L heat to boiling vessel 1, black liquor original in boiling vessel 1 is gone out to send into warm black liquor slot 4 from boiling vessel 1 upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward digester 1 and be warming up to 160 DEG C, be incubated about 60min, or determine reaction terminating according to the H factor that DCS operating system 11 calculates, ON cycle pump 6 and heating rod 8 simultaneously, be set to Automatic-heating state, when the temperature in digester 1 is lower than preset value, heating rod meeting automatic operation; The little venting of the exhaust-valve about 10min on boiling vessel 1 pot cover can be opened in digestion process.
(7) displacement washing: after boiling stops, pump into the cleaning solution of a certain amount of (about 6L) to boiling vessel 1, the black liquor of the temperature cemented out higher (120-160 DEG C) first enters hot black liquor groove 3, and the black liquor of temperature lower (<120 DEG C) enters warm black liquor slot 4;
(8) discharging: remaining gas in boiling vessel 1 is discharged, until when pressure reduces to 0Pa, the pot cover 105 unloading boiling vessel 1 takes out the mixture in boiling vessel 1;
Preparation (prehydrolysis displacement cooking) step of dissolving pulp is as follows:
(1) preparatory stage: start steam generator 10, produce steam, then the white liquid bath 2 of heat is opened, hot black liquor groove 3, warm black liquor slot 4, the steam valve 18 on washing liquid bath 5 top, pass into steam, the liquid in white liquid bath 2 is warming up to 160 DEG C, and the liquid in hot black liquor groove 3 is warming up to 160 DEG C, liquid in temperature black liquor slot 4 is warming up to 120 DEG C, and the liquid in washing liquid bath 5 is warming up to 70 DEG C;
(2) pot is filled: taken out by the Inner bucket 101 of boiling vessel 1 inside, according to the corresponding sieve plate 104 of the feature selecting of raw material, add about 600g over dry raw material (different depending on raw material different quality) and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel 1, and install liquid distributing umbrella 103, then pot cover 105 is installed;
(3) presteaming: the steam valve 18 opening boiling vessel 1 top, passes into steam, is heated to about 160 DEG C, insulation 1h; Or determine reaction terminating according to the P factor that DCS operating system 11 calculates;
(4) neutralization reaction: pump into about 2L hot black liquor and the white liquid of 2L heat to boiling vessel 1, ON cycle pump 6 circulates 10min;
(5) heat is filled: pump into about 4L hot black liquor and the white liquid of 2L heat to boiling vessel 1, black liquor original in boiling vessel 1 is gone out to send into warm black liquor slot 4 from boiling vessel 1 upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward digester 1 and be warming up to 160 DEG C, be incubated about 60min, or determine reaction terminating according to the H factor that DCS operating system 11 calculates, ON cycle pump 6 and heating rod 8 simultaneously, be set to Automatic-heating state, when the temperature in pot is lower than preset value, heating rod automatic operation; The little venting of the exhaust-valve about 10min on boiling vessel 1 pot cover can be opened in digestion process.
(7) displacement washing: after boiling stops, pump into the cleaning solution of a certain amount of (about 6L) to boiling vessel 1, the black liquor of the temperature cemented out higher (120-160 DEG C) first enters hot black liquor groove 3, and the black liquor of temperature lower (<120 DEG C) enters warm black liquor slot 4;
(8) discharging: discharged by remaining gas in boiling vessel 1, until when pressure reduces to 0Pa, unloads pot cover 105 and takes out mixture in boiling vessel 1.
Conventional gluten substitute:
(1) pot is filled: taken out by the Inner bucket 101 of boiling vessel 1 inside, according to the corresponding sieve plate 104 of the feature selecting of raw material, add about 600g over dry raw material (different depending on raw material different quality) and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel 1, and install liquid distributing umbrella 103, then pot cover 105 is installed.Add required cooking liquor by process requirements simultaneously.
(2) boiling: ON cycle pump 6 and heating rod 8, DCS operating system 11 arranges the heating-up time, little deflation time, temperature retention time, as taken Eucalyptus as raw material, heat up 160 DEG C of 1h, little venting 10min, 160 DEG C of insulation 1.5h.
(3) discharging: after boiling terminates, discharges the gas in boiling vessel 1, until when pressure reduces to 0Pa, unloads pot cover 105 and takes out mixture in boiling vessel 1.
As mentioned above, just the present invention can be realized preferably.
Embodiments of the present invention are not restricted to the described embodiments; other are any do not deviate from Spirit Essence of the present invention and principle under do change, modification, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a test-type displacement cooking device, comprise boiling vessel (1), the white liquid bath (2) of heat, hot black liquor groove (3), warm black liquor slot (4), washing liquid bath (5), steam generator (10), DCS operating system (11), it is characterized in that:
The top liquid mouth of boiling vessel (1) is communicated with by main steam range with between steam generator (10); The interface end of main steam range and boiling vessel (1) top liquid mouth is provided with valve A, and the interface end of main steam range and steam generator (10) is provided with valve D;
The respective inlet of the white liquid bath (2) of heat, hot black liquor groove (3), warm black liquor slot (4), washing liquid bath (5) has two interfaces, one of them interface is communicated with feed liquor house steward by liquid feed valve (16), and another interface is communicated with main steam range by steam valve (18); Feed liquor house steward is communicated with the top liquid mouth of boiling vessel (1) by valve B;
The respective liquid outlet of hot white liquid bath 2, hot black liquor groove (3), warm black liquor slot (4), washing liquid bath (5) is all communicated with drawing liquid house steward by liquid valve (19), and total interface of drawing liquid house steward is successively by the bottom liquid mouth of sludge filter device (21), spray pump (7), flowmeter (9) connection boiling vessel (1);
The top liquid mouth of boiling vessel (1) and the pipeline of bottom liquid mouth are provided with valve C, heating rod (8), circulating pump (6) successively;
The inner bottom part of boiling vessel (1) is equipped with liquid distribution plate (102), and liquid distributing umbrella (103) is equipped with at top;
Dismountable seam type sieve plate (104) is equipped with at Inner bucket (101) bottom of boiling vessel (1) and top.
Described DCS operating system (11) shows boiling vessel (1), the white liquid bath (2) of heat, hot black liquor groove (3), warm black liquor slot (4) in real time and washs the liquid level of liquid bath (5), temperature, pressure also controls spray pump (7), the switch of circulating pump (6) and heating rod (8).
2. test-type displacement cooking device according to claim 1, is characterized in that: the top of the white liquid bath of described heat (2), hot black liquor groove (3), warm black liquor slot (4), washing liquid bath (5) is all provided with pressure sensor (15), safety valve (14), exhaust-valve (17).
3. test-type displacement cooking device according to claim 1, is characterized in that: the white liquid bath (2) of described boiling vessel (1), heat, hot black liquor groove (3), warm black liquor slot (4) and the side washing liquid bath (5) are provided with liquid level sensor (12), temperature sensor (13).
4. test-type displacement cooking device according to any one of claims 1 to 3, is characterized in that: the white liquid bath of described heat (2), hot black liquor groove (3), warm black liquor slot (4) and washing liquid bath (5) bottom install blowoff valve (20).
5. test-type displacement cooking device according to claim 3, is characterized in that: described liquid level sensor (12) is magnetic turnover plate type liquid level sensor; Described temperature sensor (13) is RTD stainless steel temperature sensor.
6. test-type displacement cooking device according to claim 4, is characterized in that: the white liquid bath (2) of described boiling vessel (1), heat, hot black liquor groove (3), warm black liquor slot (4), washing liquid bath (5) material are two phase stainless steel.
7. test-type displacement cooking device according to claim 4, it is characterized in that: described boiling vessel (1), the white liquid bath (2) of heat, hot black liquor groove (3), temperature black liquor slot (4), washing liquid bath (5) outer wall is all surrounded by heat-insulation layer.
8. test-type displacement cooking device according to claim 4, is characterized in that: described circulating pump (6) is two phase stainless steel magnetic drive pump.
9. test-type displacement cooking device according to claim 4, is characterized in that: described flowmeter (9) is ultrasonic flowmeter; Described steam generator (10) is electrical heating type steam generator; Described heating rod (8) is with anti-dry protection system.
10. adopt the method for test-type displacement cooking device preparative chemistry slurry or dissolving pulp according to any one of claim 1 to 9, it is characterized in that following steps:
The preparation process of chemical pulp is as follows:
(1) preparatory stage: start steam generator (10), produce steam, then the white liquid bath (2) of heat is opened, hot black liquor groove (3), temperature black liquor slot (4), the steam valve (18) on washing liquid bath (5) top, pass into steam, liquid in white for heat liquid bath (2) is warming up to 160 DEG C, the liquid of hot black liquor groove (3) is warming up to 160 DEG C, the liquid of temperature black liquor slot (4) is warming up to 120 DEG C, and the liquid of washing liquid bath (5) is warming up to 70 DEG C;
(2) pot is filled: taken out by the Inner bucket (101) of boiling vessel (1), according to the corresponding sieve plate of the feature selecting of raw material (104), add 600g over dry raw material and install top sieve plate (104), the Inner bucket (101) that raw material is housed is put into boiling vessel (1), and install liquid distributing umbrella (103), pot cover (105) is then installed;
(3) presteaming: the steam valve opening boiling vessel (1) top, passes into steam, is heated to 100 DEG C, the air in removing raw material;
(4) temperature is filled: pump into 4L temperature black liquor and boiling vessel (1) is full of by the white liquid of 2L heat, then in boiling vessel (1), steam is passed into, be heated to 120 DEG C, ON cycle pump (6) and heating rod (8), be set to Automatic-heating state, when the temperature in boiling vessel (1) is lower than preset value, heating rod (8) meeting Automatic-heating, makes boiling vessel (1) be incubated 30min;
(5) heat is filled: pump into 4L hot black liquor and the white liquid of 2L heat to boiling vessel (1), original black liquor in boiling vessel (1) is gone out to send into warm black liquor slot (4) from boiling vessel (1) upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward boiling vessel (1) and be warming up to 160 DEG C, insulation 60min, or determine reaction terminating according to the upper H factor calculated of DCS operating system (11), ON cycle pump (6) and heating rod (8) simultaneously, be set to Automatic-heating state, when the temperature in boiling vessel (1) is lower than preset value, heating rod meeting automatic operation;
(7) displacement washing: after boiling stops, pump into the cleaning solution of 6L to boiling vessel (1), the temperature cemented out is that first the black liquor of 120-160 DEG C enters hot black liquor groove (3), and temperature is that the black liquor of <120 DEG C enters warm black liquor slot (4);
(8) discharging: gas remaining in boiling vessel (1) is discharged, until when pressure reduces to 0Pa, the pot cover 105 unloading boiling vessel (1) takes out the mixture in boiling vessel (1);
The preparation process of dissolving pulp is as follows:
(1) preparatory stage: start steam generator (10), produce steam, then the white liquid bath (2) of heat is opened, hot black liquor groove (3), temperature black liquor slot (4), the steam valve (18) on washing liquid bath (5) top, pass into steam, liquid in white liquid bath 2 is warming up to 160 DEG C, liquid in hot black liquor groove (3) is warming up to 160 DEG C, liquid in temperature black liquor slot (4) is warming up to 120 DEG C, and the liquid in washing liquid bath (5) is warming up to 70 DEG C;
(2) pot is filled: the Inner bucket 101 that boiling vessel (1) is inner takes out, according to the corresponding sieve plate 104 of the feature selecting of raw material, add 600g over dry raw material and install top sieve plate 104, the Inner bucket 101 that raw material is housed is put into boiling vessel (1), and install liquid distributing umbrella (103), pot cover (105) is then installed;
(3) presteaming: the steam valve (18) opening boiling vessel (1) top, passes into steam, is heated to about 160 DEG C, insulation 1h;
(4) neutralization reaction: pump into about 2L hot black liquor and the white liquid of 2L heat to boiling vessel (1), ON cycle pump (6) circulation 10min;
(5) heat is filled: pump into about 4L hot black liquor and the white liquid of 2L heat to boiling vessel (1), original black liquor in boiling vessel (1) is gone out to send into warm black liquor slot (4) from boiling vessel (1) upper replacement, keeps pumping into flow consistent with the flow displaced;
(6) heat up: heat is filled and passed into steam in backward boiling vessel (1) and be warming up to 160 DEG C, insulation 60min, or determine reaction terminating according to the upper H factor calculated of DCS operating system (11), ON cycle pump (6) and heating rod (8) simultaneously, be set to Automatic-heating state, when the temperature in pot is lower than preset value, heating rod automatic operation;
(7) displacement washing: after boiling stops, pump into the cleaning solution of 6L to boiling vessel (1), the temperature cemented out is 120-160 DEG C) black liquor first enter hot black liquor groove (3), temperature is that the black liquor of <120 DEG C enters warm black liquor slot (4);
(8) discharging: discharged by gas remaining in boiling vessel (1), until when pressure reduces to 0Pa, unloads pot cover 105 and takes out mixture in boiling vessel (1).
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