CN1186878A - Double effect intermittent cooling type degassing device and its use - Google Patents
Double effect intermittent cooling type degassing device and its use Download PDFInfo
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- CN1186878A CN1186878A CN97119129A CN97119129A CN1186878A CN 1186878 A CN1186878 A CN 1186878A CN 97119129 A CN97119129 A CN 97119129A CN 97119129 A CN97119129 A CN 97119129A CN 1186878 A CN1186878 A CN 1186878A
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Abstract
The degassing device includes two specially designed serial high-efficiency degassing cylinders and one intermittent cooling exchanger for condensation. It is used in coagulating bath for continuous production of viscose fibre to reduce H2S and CS2 content in liquid to below 6 mg/l. It has high degassing efficiency.
Description
The present invention relates to the degasser and the application in viscose is produced thereof of double effect intermittent cooling type.
In recent years along with industrial develop rapidly, the production of viscose also develops into continuous production processes by traditional interruption production technology, the rear portion production process was shortened to only with 2 minutes by needs in 70 hours, to reel off raw silk from cocoons and solidify, strand cleaning, starching, oven dry, go up the wet goods operation and concentrate on the spinning machine and finish, this high-speed continuous production processes requires hydrogen sulfide (H in the coagulating bath
2S) and carbon disulfide (CS
2) content must be less than 6mg/l, because if hydrogen sulfide in the coagulating bath and carbon disulfide are too high, can cause the residual sulphur of viscose high and cause fiber embrittlement, intensity and degree of stretching to descend; Can cause the inside pipe wall in the coagulating bath supply system to produce ZnS and the fouling of free sulfur solids precipitation again, cause the coagulating bath mass flow discrepancy between each ingot even easily, cause the inhomogeneous of strand quality, make especially and inhale the increase of colour deviation; And H in coagulating bath
2S and CS
2Too high levels, worsened production environment, directly influence health of operators.H in the coagulating bath in the actual production
2The content of S is 33-36mg/l, CS
2Content be 25-28mg/l, so coagulating bath must be handled the H make wherein through the degassing
2S and CS
2Content reduce to below the 6mg/l, could allocate recycling once more.At present the continuous production technology of viscose is comparatively leading with Italy, and its acid bath degasser that uses at the spinning machine of Sao Paulo, Brazil device of NOY company as shown in Figure 1.Degassing pump 20 links to each other with the inlet tube 221 of heater 21, degassing tank 22 is positioned at the top of heater 21, both are structure as a whole, the liquid outlet tube 221 of degassing tank 22 communicates with recovery hopper 23, its outlet 231 links to each other with circulating pump 24, the escape pipe 222 of degassing tank 22 links to each other with the air inlet pipe 251 of mixing condenser 25, the declining liquid tube 253 of condenser 25 feeds in the liquid bath 29, the escape pipe 254 of condenser 25 links to each other with the inlet tube 271 of second condenser 27 by steam jet pump 26, the declining liquid tube 274 of second condenser feeds in the liquid bath 29, by discharging tube 291 dischargings, the escape pipe 273 of second condenser 27 connects vavuum pump 28, with the pernicious gas high altitude discharge or send into retracting device, enter first condenser 25 and second condenser 27 from cold water inlet tube 252 and 272 respectively from the phreatic water of pumping plant.The major defect of above-mentioned degasser is: one, and heater and degassing tank are structure as a whole, and exist heating inhomogeneous lower with the thermal efficiency, and the effect of the influence degassing; Its two, mixing condenser becomes a large amount of fresh waters into the water discharging of slight pollution, waste great amount of water resources; Its three, evaporation simultaneously in a container 22 is difficult to produce a desired effect simultaneously during the degassing of moisture in the coagulating bath liquid.
The object of the present invention is to provide a kind of degasser of double effect intermittent cooling type, reach the degasifying effect of high-efficiency and low-cost;
Another object of the present invention is to provide a kind of, reach the quality that improves viscose and reduce environmental pollution the application process of degasser of the present invention in viscose is produced.
The object of the present invention is achieved like this: a kind of degasser of double effect intermittent cooling type, this device comprise liquid storage vessel, compression pump, heater, first degassing tank, fluid-tight bend pipe, second degassing tank, the liquid bath that falls, first condenser, second condenser, condensate draining, cool exchanger, cold water circulation pump, vavuum pump and steam jet pump; This liquid storage vessel links to each other with the inlet tube of heater by compression pump, the outlet of this heater is connected with the inlet tube of this first degassing tank, the outlet of the liquid of this first degassing tank is connected by the inlet tube of fluid-tight bend pipe with second degassing tank, the liquid outlet tube of this second degassing tank is connected with the inlet tube of the liquid bath that falls, the pipe that goes out of this first degassing tank links to each other with first inlet tube of first condenser, the escape pipe of this second degassing tank links to each other with the inlet tube of second condenser, the escape pipe of this second condenser links to each other with second air inlet pipe of first condenser by steam jet pump, the gas outlet of this first condenser links to each other with vavuum pump, the woven hose of this first and second condenser links to each other with condensate draining respectively, and this cold water circulation pump links to each other cool exchanger with described first and second condensers.
The inside of this first degassing tank is provided with liquid dish combining structure, by being placed on the location of being fixed on this degassing tank sidewall, holder angle, this liquid dish that falls is that distribution diameter is the liquid hole that falls of 10-15mm on its bottom surface of 3-5 layer, distance between the adjacent liquid hole that falls is 25-30mm, be provided with the sieve plate in the liquid hole that distributes in position, be provided with gusset in this bottom surface that falls liquid dish and sieve plate near the degassing tank bottom; The inlet tube of this second degassing tank is a horizontal shower, the umbrella spray hole that its downside distribution diameter is 10-15mm, and the distance between the adjacent spray hole is 25-30mm; This first and second degassing tank comprises selects acidproof steel or the acidproof or alkaline-resisting rubber layer of liner for use; This degasser can be used for removing the H in the viscose spinning coagulation bath liquid
2S, CS
2And moisture.
Major advantage of the present invention is:
1, degasser of the present invention adopts the economic benefits and social benefits degassing design of two special efficient degassing tank series connection, has improved degassing efficiency greatly, makes the H in the coagulating bath
2S and CS
2Content reach below the 6mg/l.
2, degasser of the present invention adopts and earlier coagulating bath is heated to required temperature by heater, sends into degassing tank again, has guaranteed homogeneous heating, has improved the thermal efficiency, has saved heat energy.
3, the present invention adopts shell and tube indirect-cooling cool exchanger to finish condensation process, condensation by mixing method commonly used, the energy and water source have been saved, because condensation by mixing method commonly used is per hour used 100 tons 15 ℃ water approximately, become the discharge of wastewater of 40 ℃ of slight pollutions, waste a large amount of water sources, the present invention's indirect condensing uses the cooling water sealing and circulating, both pollution-free, saved precious water resource again.
4, degasser of the present invention, HS in removing coagulating bath
2And CS
2In the time of gas, also evaporate part moisture wherein, the degassing and evaporation soon is incorporated on the cover degasser and finishes, and saved production area, equipment, the energy and man-hour.
5, double effect intermittent cooling type degasser of the present invention makes the H in the coagulating bath in the production of serialization viscose
2S and CS
2Content be lower than 6mg/l, can be used for redistribution coagulating bath reuse, make the residual sulphur in the viscose reach 70mg/100g simultaneously, well below standard value 150mg/100g, improved the product quality of viscose.
The present invention is further described below in conjunction with accompanying drawing and preferred embodiment.
Fig. 1 is the schematic diagram of degasser commonly used;
Fig. 2 is the flow chart of degasser of the present invention;
Fig. 3 is the schematic diagram of the first degassing tank structure of the present invention;
Fig. 4 is the schematic diagram of the second degassing tank structure of the present invention.
Consult Fig. 2-Fig. 4, degasser of the present invention comprise coagulating bath liquid storage vessel 1, for sour pump 2, heater 3, first degassing tank 4, fluid-tight bend pipe 5, second degassing tank 6, acid tank 7, first condenser 8, second condenser 9, condensate draining 10, cool exchanger 11, cold water circulation pump 12, vavuum pump 13 and steam jet pump 14 fall.
The coagulating bath liquid that is refluxed by spinning machine at first enters in the liquid storage vessel 1 of coagulating bath, wherein except that parameters such as temperature, concentration do not meet the process conditions requirement, also contains higher pernicious gas H
2S and CS
2, the H in the coagulating bath
2S and CS
2Viscose glue is separated out in the process of setting in coagulating bath when reeling off raw silk from cocoons, because when making viscose, added the CS that is equivalent to cellulose 31-34%
2, make the cash fibrin reaction generate cellulose sulfonate, be dissolved in again in the sodium hydroxide solution, become rayon spinning liquid, the solvent during spinning in the rayon spinning liquid (contains H in coagulating bath
2SO
4, Na
2SO
4And ZnSO
4Deng) in reaction, cellulose regenerated come out, and account for the CS of former input amount 60% during reaction
2Be reduced into CS again
2Or generation H
2S, wherein quite a few is dissolved in the coagulating bath, makes H in the coagulating bath
2S content is 33-36mg/l, CS
2Content is 25-28mg/l, and therefore this coagulating bath must be handled through the degassing, makes H
2S, CS
2Content is reduced to below the 6mg/l, recycles after could allocating once more.
For sour pump 2 liquid in the storage tank 1 is sent into heater 3 by heater import 31, by heater outlet 32 outputs, this heater 3 is an indirect heating apparatus, about 1.2kg/cm again
2Steam enter from steam inlet 34, the fluid temperature of spontaneous coagulation bath in the future improves 4-5 ℃, and condensed water is from drainpipe 33 dischargings (or reuse), and heater 3 is independent equipment among the present invention, have than the design of putting into degassing tank and to be convenient to regulate the control heating-up temperature, save advantages such as heat energy.Coagulating bath liquid through heating enters in first degassing tank 4 from feed pipe 41, this first degassing tank 4 is provided with liquid dish combining structure for inside, as shown in Figure 3, it comprises the 4 layers of liquid dish 44 that falls, 45,46,47 and support column 48, being distributed with diameter on the every layer of liquid that falls is tried to get to the heart of a matter face is the liquid hole 416 that falls of 10-15mm, two adjacent pitch-rows are 25-30mm, centre at the liquid dish that respectively falls strikes up partnership for 48 groups by support column, the liquid that respectively falls try to get to the heart of a matter below be provided with gusset 417, the bottom surface of its second and the 4th layer of fall liquid dish 45 and 47 has the holder angle 410 that is fixed on degassing tank 4 sidewalls, for the liquid dish combination placement positioning that falls, this effect that falls liquid dish combining structure has two: one can increase the liquid surface area that enters in the degassing tank 4, improves degasifying effect; Its two liquid curtain by each interlayer of liquid dish that falls reduces a large amount of evaporations of moisture in the coagulating bath liquid as far as possible.Close bottom at first degassing tank 4 is provided with sieve plate 49, which is provided with liquid hole 416, and by 410 location, holder angle, be provided with manhole 411 in the side of first degassing tank 4, also be provided with liquid level gauge connector 412, vavuum pump connector 43, thermometer and vacuum meter and insert mouth 413 and 414, and standby mouthful 415, the temperature in first degassing tank 4 is 60-80 ℃, its vacuum is deviate from H at the 500-600mmHg post through first degassing tank 4
2S, CS
2And the liquid of the coagulating bath of part moisture, flow out from liquid outlet 42, inlet tube 61 by the fluid-tight bend pipe 5 and second degassing tank 6 enters in second degassing tank 6, this inlet tube 61 is showers that are horizontally placed in second degassing tank 6, as shown in Figure 4, the spray hole 611 of the diameter 10-15mm of its downside branch umbrella, distance between the adjacent holes is 25-30mm, vacuum in second degassing tank 6 all is higher than first degassing tank 4, vacuum is the 550-650mmHg post, and the effect of second degassing tank 6 has two: one further makes residual H
2S and CS
2Overflow; Its two main task is to measure the moisture that steams in the coagulating bath solution on demand, and the size of evaporation capacity realizes by valve in the adjustments of gas outlet 63 and the heating steam amount that enters heater 3.Coagulating bath liquid through twice degassing enters in the acid tank 7 from the liquid outlet 62 of second degassing tank 6 and the acid tank inlet tube 71 that falls, and through after the suitable proportioning, sends into to reclaim in the viscose spinning coagulation bath and uses.
The H that overflows from the gas outlet 43 of first degassing tank 4
2S, CS
2, other gas and a certain amount of water vapour enter in the shell side of first condenser 8 by inlet tube 81 together on a small quantity, water vapour is condensed into condensed water, portion C S in shell side
2Also be condensed into liquid state discharges by pipeline 102 overflows after pipeline 84 falls into condensate draining 10 thereupon again.
By the water vapour and the small amount of H of overflowing in second degassing tank 6
2S, CS
2Enter in the shell side of second condenser 9 water vapour and a spot of CS by gas outlet 63 and air inlet pipe 91
2Condense into liquid state, after pipeline 93 falls into condensate draining 10, can cross pipeline 102 overflows discharging more together.
The incoagulable gas that enters second condenser 9 is by steam jet pump 14 sucking-offs and send into by import 83 in the shell side of first condenser 8, steam condenses into water at this, fall into condensate draining 10 along pipeline 84, all the other incoagulable gas converge by the incoagulable gas of first degassing tank 4 together by gas outlet 82 by vavuum pump 13 sucking-offs and enter wind output channel, throw in high altitude discharge or enter in the retracting device through toxin expelling.
The power of steam jet pump 14 is uperize 15, pressure is not less than 0.5MP (MPa), the low-temperature receiver of first condenser 8 and second condenser 9 is the cold water of circulation in the tube side, enters 8 and be 4 ℃ at 9 o'clock under the normal condition, and leaving water temperature depends on the size of evaporation capacity and decides.
Cold water recycles between condenser 8,9, cold water circulation pump 12 and cool exchanger 11, send in the tube side of cool exchanger 11 by condenser 8 and 9 outlets, 86 and 95 cooling waters that come out by import 111 through circulating pump 12, cool the temperature to and enter in condenser 8 and 9 about 4 ℃ again by circulating in cool brine in the shell side, cool brine is sent here by refrigeration station, the temperature of water inlet 113-8 ℃, the temperature of delivery port 114 rises to-3 ℃ and flows back to refrigeration station after cold exchange.Indirect type condenser system of the present invention is used the cooling water sealing and circulating, and is both pollution-free, saved precious water resource again, and had preferable cooling effect.
Degasser of the present invention in a word has high efficiency, low cost, reduces the preferable effect of environmental pollution and raising viscose quality.
Claims (5)
1, a kind of degasser of double effect intermittent cooling type is characterized in that this device comprises liquid storage vessel, compression pump, heater, first degassing tank, fluid-tight bend pipe, second degassing tank, the liquid bath that falls, first condenser, second condenser, condensate draining, cool exchanger, cold water circulation pump, vavuum pump and steam jet pump; This liquid storage vessel links to each other with the inlet tube of heater by compression pump, the outlet of this heater is connected with the inlet tube of this first degassing tank, the outlet of the liquid of this first degassing tank is connected by the inlet tube of fluid-tight bend pipe with second degassing tank, the liquid outlet tube of this second degassing tank is connected with the inlet tube of the liquid bath that falls, the pipe that goes out of this first degassing tank links to each other with first inlet tube of first condenser, the escape pipe of this second degassing tank links to each other with the inlet tube of second condenser, the escape pipe of this second condenser links to each other with second air inlet pipe of first condenser by steam jet pump, the gas outlet of this first condenser links to each other with vavuum pump, the woven hose of this first and second condenser links to each other with condensate draining respectively, and this cold water circulation pump links to each other cool exchanger with described first and second condensers.
2, degasser according to claim 1, the inside that it is characterized in that this first degassing tank is provided with liquid dish combining structure, by being placed on the location of being fixed on this degassing tank sidewall, holder angle, this liquid dish that falls is that distribution diameter is the liquid hole that falls of 10-15mm on its bottom surface of 3-5 layer, distance between the adjacent liquid hole that falls is 25-30mm, be provided with the sieve plate in the liquid hole that distributes in position, be provided with gusset in this bottom surface that falls liquid dish and sieve plate near the degassing tank bottom.
3, degasser according to claim 1, the inlet tube that it is characterized in that this second degassing tank are a horizontal shower, the umbrella spray hole that its downside distribution diameter is 10-15mm, and the distance between the adjacent spray hole is 25-30mm.
4, degasser according to claim 1 is characterized in that this first and second degassing tank comprises to select acidproof steel or the acidproof or alkaline-resisting rubber layer of liner for use.
5, a kind of application process of degasser as claimed in claim 1 is characterized in that this degasser can be used for removing the H in the viscose spinning coagulation bath liquid
2S, CS
2And moisture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119129A CN1058907C (en) | 1997-10-13 | 1997-10-13 | Double effect intermittent cooling type degassing device and its use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119129A CN1058907C (en) | 1997-10-13 | 1997-10-13 | Double effect intermittent cooling type degassing device and its use |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1186878A true CN1186878A (en) | 1998-07-08 |
| CN1058907C CN1058907C (en) | 2000-11-29 |
Family
ID=5175212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119129A Expired - Fee Related CN1058907C (en) | 1997-10-13 | 1997-10-13 | Double effect intermittent cooling type degassing device and its use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1058907C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856570A (en) * | 2010-06-03 | 2010-10-13 | 西安康本材料有限公司 | Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution |
| CN102278868A (en) * | 2011-08-02 | 2011-12-14 | 济南圣泉集团股份有限公司 | Exhaust gas recycling technology and device in isothiocyanate preparation |
| CN105251232A (en) * | 2015-11-23 | 2016-01-20 | 山东丰特环保科技有限公司 | Equipment and process for condensing and collecting steam and waste gas at tail end of multi-grade flash evaporation device |
| CN105600857A (en) * | 2015-10-22 | 2016-05-25 | 唐山三友集团兴达化纤有限公司 | Degassing treatment technology of alkaline wastewater in viscose fiber production |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US916413A (en) * | 1908-01-17 | 1909-03-30 | Adam Biedermann | Horseshoer's stand. |
| US4311683A (en) * | 1976-06-28 | 1982-01-19 | Union Oil Company Of California | Process for removal of hydrogen sulfide from gas streams |
| CN1037157C (en) * | 1992-07-15 | 1998-01-28 | 江西省纺织工业科研设计院 | Method and device for tackling waste gas from viscose fibers production |
| DE4437994C1 (en) * | 1994-10-25 | 1996-07-04 | Hoechst Ag | Degassing system, esp. for PTFE thermal decompsn. prods. |
| CN1126296A (en) * | 1994-12-25 | 1996-07-10 | 黄河清 | Separating and vacuum degassing unit for boiler water |
| JP3571802B2 (en) * | 1995-06-08 | 2004-09-29 | 株式会社東芝 | Condenser with built-in deaerator |
-
1997
- 1997-10-13 CN CN97119129A patent/CN1058907C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101856570A (en) * | 2010-06-03 | 2010-10-13 | 西安康本材料有限公司 | Dynamic demonomerization and defoaming method and device for carbon fiber spinning solution |
| CN102278868A (en) * | 2011-08-02 | 2011-12-14 | 济南圣泉集团股份有限公司 | Exhaust gas recycling technology and device in isothiocyanate preparation |
| CN105600857A (en) * | 2015-10-22 | 2016-05-25 | 唐山三友集团兴达化纤有限公司 | Degassing treatment technology of alkaline wastewater in viscose fiber production |
| CN105600857B (en) * | 2015-10-22 | 2019-03-08 | 唐山三友集团兴达化纤有限公司 | The vacuum degasing pretreatment of viscose rayon production neutral and alkali waste water |
| CN105251232A (en) * | 2015-11-23 | 2016-01-20 | 山东丰特环保科技有限公司 | Equipment and process for condensing and collecting steam and waste gas at tail end of multi-grade flash evaporation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1058907C (en) | 2000-11-29 |
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