CN109173311A - A kind of method of acid bath system flash distillation secondary steam cycling and reutilization - Google Patents
A kind of method of acid bath system flash distillation secondary steam cycling and reutilization Download PDFInfo
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- CN109173311A CN109173311A CN201810902647.1A CN201810902647A CN109173311A CN 109173311 A CN109173311 A CN 109173311A CN 201810902647 A CN201810902647 A CN 201810902647A CN 109173311 A CN109173311 A CN 109173311A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/06—Flash distillation
- B01D3/065—Multiple-effect flash distillation (more than two traps)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/007—Energy recuperation; Heat pumps
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Abstract
The present invention relates to a kind of methods of acid bath system flash distillation secondary steam cycling and reutilization, the following steps are included: the secondary steam of the acid bath system flash vaporization room V11 in (1) viscose glue production system enters first-class heat exchanger, the secondary steam of vaporization chamber V10 enters secondary heat exchanger, the secondary steam of vaporization chamber V9 enters three-level heat exchanger, carries out heat exchange with the recirculated water in heat exchangers at different levels respectively；(2) secondary steam is passed through into the condensed condensation water collection reuse of heat exchanger, while on-condensible gas in secondary steam is vacuumized into reuse, and the raised recirculated water of temperature in heat exchanger is entered into closed cooling tower and carries out cooling reuse.The present invention fundamentally solves viscose glue industry acid bath evaporation system peculiar smell and no longer volatilizees, the distinctive structure of closed cooling tower and technological principle simultaneously, be not only able to satisfy the cooling water temperature of workshop requirement, but also can run steadily in the long term, can also water-saving, energy saving, emission reduction, extend the process equipment service life.
Description
Technical field
The present invention relates to a kind of methods of acid bath system flash distillation secondary steam cycling and reutilization, belong to viscose glue acid bath production skill
Art field.
Background technique
The secondary air cooling of short rayon fiber industry flash system low temperature at present is solidifying most of using mixing condenser (MK) and auxiliary
Condenser (HK) recirculated water cross-flow condensation by mixing, secondary vapour condensation after cure hydrogen is partly dissolved in recirculated water, and is recycled
Water directly mixes cold cooling tower cooling using open type, and the volatilization of temperature-fall period hydrogen sulfide gas causes environmental pollution, equally to human body
There are harmfulness, do not meet country and local environmental requirement, increasingly stringent etc. from Sustainable Development of Enterprises and environmentally friendly relevant criterion
From the aspect of long-range, this problem is also required to urgently solve.Viscose glue industry part of the manufacturer attempts to drop using the novel secondary gas of low temperature
Warm technique, operating cost is higher, is not suitable for needs of production.
Existing 11 effect flash distillation process is: by taking evaporability 12t/h water as an example, about 100 ± 5m3Dilute spinning bath of/h
Enter vaporization chamber V10 by flowmeter, be de-gassed, cool down and cool down in V10 and V11, is about down to 38 DEG C by 49 DEG C, then
Heat exchanger A8 to A1 is sent by circulating pump UP and is gradually preheated to 85 DEG C or so, enters back into heater A0 and H.Finally heated in H
To 107 DEG C (highest), enter back into preflash vaporization chamber V1~V2.Acid bath is under vacuum conditions at steam fog shape, through flash temperature
95 DEG C or so are down to, partial moisture is evaporated, bath foam is entered horizontal flash vaporization room V3~V9 by gravity, makes moisture content step by step
Evaporation, is down to 48-50 DEG C in this bath temperature, and the acid bath through this concentration falls acid tube by V9 and falls into concentration acid tank.
In the V1~V8 of flash vaporization room, the secondary steam of generation accordingly enters A1~A8, passes through tubulation and acid bath
It exchanges heat, is heated acid bath gradually.The condensate liquid (acid water) of secondary steam flows into receiving slit by respective downpipe
In exhaust.The secondary steam of flash vaporization room V9~V11 abjection enters in mixing condenser MK and auxiliary condenser HK, with cooling
Water condensation, concentration are drained into receiving slit and exhaust, and on-condensable gas is inducted into water ring vacuum pump discharge by steam jet pump.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of sides of acid bath system flash distillation secondary steam cycling and reutilization
Method, it is specifically a kind of to be condensed in recuperator using recirculated water to flash vaporization room V9, V10, V11 secondary steam, it increases
The recirculated water of temperature cools down in closed cooling tower, for the new process of acid bath flash vaporization system, feasible process, and can realize
Cooling water circulation use, energy-saving and emission-reduction reduce the purpose of pollution.
The technical scheme to solve the above technical problems is that a kind of acid bath system flash distillation secondary steam circulation is sharp again
Method, comprising the following steps: (1) secondary steam of acid bath system flash vaporization room V11 enters first-class heat exchanger, vaporization chamber
The secondary steam of V10 enters secondary heat exchanger, and the secondary steam of vaporization chamber V9 enters three-level heat exchanger, respectively with heat exchangers at different levels
Interior recirculated water carries out heat exchange；(2) secondary steam is passed through into the condensed condensation water collection reuse of heat exchanger, while will be secondary
On-condensible gas vacuumizes reuse in steam, and the raised recirculated water of temperature in heat exchanger is entered closed cooling tower and is cooled down back
With.
The beneficial effects of the present invention are: the present invention is condensed using heat exchanger for flash system low temperature secondary steam, it is mating
Recirculated water uses closed cooling tower temperature reduction technology, solves original flash system using mixing condenser to secondary vapour temperature-fall period
In, hydrogen sulfide gas is dissolved in recirculated water, and mating open cooling tower pollutes environment to circulating water cooling, hydrogen sulfide gas volatilization,
Endanger people's health, simultaneously because entire technical process is closed system, the consumption of no recirculated water, substantially reduce water consume at
This.
Based on the above technical solution, the present invention can also be improved as follows.
Further, in step (1), the secondary steam temperature of the vaporization chamber V9 is 45-50 DEG C, the vaporization chamber V10's
40-45 DEG C of secondary steam temperature, the secondary steam temperature of the vaporization chamber V11 are 36-40 DEG C.
Further, in step (1), the heat exchanger is dividing wall type heat exchanger, specifically, board-like dividing wall type can be used
Heat exchanger.
Further, in step (1), following in the first-class heat exchanger, the secondary heat exchanger and the three-level heat exchanger
Ring water is sequentially communicated by pipeline, the first-class heat exchanger inflow temperature be 26-30 DEG C, leaving water temperature be 31-35 DEG C, described two
Grade heat exchanger inflow temperature is 31-35 DEG C, and leaving water temperature is 36-40 DEG C, and the three-level heat exchanger inflow temperature is 36-40 DEG C,
Leaving water temperature is 41-45 DEG C.
Beneficial effect using above-mentioned further scheme is for flash vaporization room V9, V10, V11 secondary steam in partition
It is condensed in formula heat exchanger, dividing wall type heat exchanger uses 904L material, and secondary steam and recirculated water use counterflow heat exchange, and recirculated water is first
Condensation evaporation room V11 secondary steam, then condensation evaporation room V10 secondary steam, last condensation evaporation room V9 secondary steam are rationally sharp
It is used for temperature-fall period with recirculated water, while secondary steam and recirculated water to separate in partition condenser.
Further, in step (2), by the recycling condensing water of collection between the spinning practice of viscose glue production system.
Beneficial effect using above-mentioned further scheme be step (2) in the specific implementation, the condensed water of collection is for gluing
Between spinning practice in glue production system, as water is washed, the consumption of workshop fresh deionized water is reduced, realizes the recycling of condensed water
It recycles.
Further, in step (2), the vacuum degree that the on-condensible gas vacuumizes is 4-7kpa, and the on-condensible gas is by water
Ring vacuum pump is taken away, first removes the hydrogen sulfide in fixed gas, then the high-altitude after adsorption system recycles carbon disulfide through caustic washing system
Discharge.
Beneficial effect using above-mentioned further scheme is according to the temperature of vaporization chamber V9, V10, V11 secondary steam, setting
The vacuum degree of water ring vacuum pump makes vaporization chamber V9, V10, V11 reheat steam temperature degree and vacuum match, guarantees its evaporation capacity, take away
On-condensible gas for the alkali cleaning and adsorption system processing in viscose glue production system, using in caustic soda and hydrogen sulfide production sulphur hydrogenation
Sodium recycles carbon disulfide using activated carbon adsorption.
Further, in step (2), the closed cooling tower inflow temperature is 41-45 DEG C, and leaving water temperature is 26-30 DEG C.
Further, in step (2), the fan delivery of the closed cooling tower is 0-5000000m3/ h, spraying amount of water are
0-8.5t/h。
Further, in step (2), the recirculated water after closed cooling tower cooling is back to heat exchangers at different levels, the enclosed
Can be recycled with water in cooling tower.
Beneficial effect using above-mentioned further scheme is the cooling that closed cooling tower is used for recirculated water, need to be guaranteed into Ta Shui
Temperature, when environment temperature only can meet technique production requirement (when environment temperature is down to 0 DEG C or less by blower cooling lower than 27 DEG C
When in addition wind-connector all do not need to open, Temperature fall), when environment temperature be higher than 27 DEG C, need to increase shower water drop
Temperature, the air quantity and water spray of blower are adjusted with actual ambient temperature, and the water for spraying out can be recycled.
Specific embodiment
The principles and features of the present invention are described below, and the given examples are served only to explain the present invention, is not intended to limit
Determine the scope of the present invention.
The present invention relates to a kind of methods of acid bath system flash distillation secondary steam cycling and reutilization, comprising the following steps: (1) two
Secondary steam condenses in recuperators at different levels, and the secondary steam of acid bath system flash vaporization room V11 enters first-class heat exchanger, steams
The secondary steam of hair room V10 enters secondary heat exchanger, and the secondary steam of vaporization chamber V9 enters three-level heat exchanger, changes respectively at different levels
Recirculated water in hot device carries out heat exchange, and wherein first-class heat exchanger (secondary steam of vaporization chamber V11) intake air temperature is 36-40
DEG C, recirculated water inflow temperature is 26-30 DEG C, and leaving water temperature is 31-35 DEG C, secondary heat exchanger (secondary steam of vaporization chamber V10)
40-45 DEG C of intake air temperature, recirculated water inflow temperature is 31-35 DEG C, and leaving water temperature is 36-40 DEG C, three-level heat exchanger (vaporization chamber V9
Secondary steam) intake air temperature be 45-50 DEG C, recirculated water inflow temperature be 36-40 DEG C, leaving water temperature be 41-45 DEG C；(2) will
Secondary steam is back between the spinning practice of viscose glue production system by the condensed condensation water collection of heat exchanger, is used as water is washed
In washing silk, while on-condensible gas in secondary steam is evacuated to 4-7kpa, alkali cleaning and adsorption system is back to, first through alkali cleaning system
System removes the hydrogen sulfide in fixed gas, then the high altitude discharge after adsorption system recycles carbon disulfide, using in caustic soda and hydrogen sulfide
NaHS is produced, recycles carbon disulfide using activated carbon adsorption, and the raised recirculated water of temperature in heat exchanger is entered into enclosed
Cooling tower carries out cooling and is back to heat exchangers at different levels, and closed cooling tower inflow temperature is 41-45 DEG C, and being discharged is 26-30 DEG C.Enclosed
Blower fan of cooling tower air quantity 0-5000000m3/ h, spraying amount of water are 0-8.5t/h；When environment temperature only passes through blower lower than 27 DEG C
Cooling can meet technique production requirement, and (when environment temperature is down to 0 DEG C or less or even wind-connector does not all need to open, naturally
Cooling), when environment temperature is higher than 27 DEG C, need to increase shower water cooling, spraying water used can be recycled.
Embodiment 1
A kind of method of acid bath system flash distillation secondary steam cycling and reutilization, comprising the following steps: (1) secondary steam is each
It is condensed in grade recuperator, the secondary steam of acid bath system flash vaporization room V11 enters first-class heat exchanger, vaporization chamber V10's
Secondary steam enters secondary heat exchanger, and the secondary steam of vaporization chamber V9 enters three-level heat exchanger, respectively and in heat exchangers at different levels
Recirculated water carries out heat exchange, and wherein first-class heat exchanger (secondary steam of vaporization chamber V11) intake air temperature is 36 DEG C, recirculated water water inlet
Temperature is 26 DEG C, and leaving water temperature is 31 DEG C, 40 DEG C of intake air temperature of secondary heat exchanger (secondary steam of vaporization chamber V10), recirculated water
Inflow temperature is 31 DEG C, and leaving water temperature is 36 DEG C, and three-level heat exchanger (secondary steam of vaporization chamber V9) intake air temperature is 45 DEG C, is followed
Ring water inflow temperature is 36 DEG C, and leaving water temperature is 41 DEG C；(2) secondary steam is returned by the condensed condensation water collection of heat exchanger
For being used to wash silk as water is washed, while on-condensible gas in secondary steam being vacuumized between the spinning practice of viscose glue production system
To 7kpa, it is back to alkali cleaning and adsorption system, first removes the hydrogen sulfide in fixed gas through caustic washing system, then recycle through adsorption system
High altitude discharge after carbon disulfide, produces NaHS with hydrogen sulfide using in caustic soda, recycles carbon disulfide using activated carbon adsorption,
And by the raised recirculated water of temperature in heat exchanger enter closed cooling tower carry out cooling be back to heat exchangers at different levels, closed cooling tower
Inflow temperature is 41 DEG C, and being discharged is 26 DEG C.Closed cooling tower fan delivery 0m3/ h, spraying amount of water are 0t/h；Work as environment temperature
0 DEG C, the machine that do not need to blow in can meet technique production requirement.
Embodiment 2
A kind of method of acid bath system flash distillation secondary steam cycling and reutilization, comprising the following steps: (1) secondary steam is each
It is condensed in grade recuperator, the secondary steam of acid bath system flash vaporization room V11 enters first-class heat exchanger, vaporization chamber V10's
Secondary steam enters secondary heat exchanger, and the secondary steam of vaporization chamber V9 enters three-level heat exchanger, respectively and in heat exchangers at different levels
Recirculated water carries out heat exchange, and wherein first-class heat exchanger (secondary steam of vaporization chamber V11) intake air temperature is 40 DEG C, recirculated water water inlet
Temperature is 30 DEG C, and leaving water temperature is 35 DEG C, 45 DEG C of intake air temperature of secondary heat exchanger (secondary steam of vaporization chamber V10), recirculated water
Inflow temperature is 35 DEG C, and leaving water temperature is 40 DEG C, and three-level heat exchanger (secondary steam of vaporization chamber V9) intake air temperature is 50 DEG C, is followed
Ring water inflow temperature is 40 DEG C, and leaving water temperature is 45 DEG C；(2) secondary steam is returned by the condensed condensation water collection of heat exchanger
For being used to wash silk as water is washed, while on-condensible gas in secondary steam being vacuumized between the spinning practice of viscose glue production system
To 4kpa, it is back to alkali cleaning and adsorption system, first removes the hydrogen sulfide in fixed gas through caustic washing system, then recycle through adsorption system
High altitude discharge after carbon disulfide, produces NaHS with hydrogen sulfide using in caustic soda, recycles carbon disulfide using activated carbon adsorption,
And by the raised recirculated water of temperature in heat exchanger enter closed cooling tower carry out cooling be back to heat exchangers at different levels, closed cooling tower
Inflow temperature is 45 DEG C, and being discharged is 30 DEG C.Closed cooling tower fan delivery 5000000m3/ h, spraying amount of water are 0t/h；Work as ring
27 DEG C of border temperature only can meet technique production requirement by blower cooling.
Embodiment 3
A kind of method of acid bath system flash distillation secondary steam cycling and reutilization, comprising the following steps: (1) secondary steam is each
It is condensed in grade recuperator, the secondary steam of acid bath system flash vaporization room V11 enters first-class heat exchanger, vaporization chamber V10's
Secondary steam enters secondary heat exchanger, and the secondary steam of vaporization chamber V9 enters three-level heat exchanger, respectively and in heat exchangers at different levels
Recirculated water carries out heat exchange, and wherein first-class heat exchanger (secondary steam of vaporization chamber V11) intake air temperature is 38 DEG C, recirculated water water inlet
Temperature is 28 DEG C, and leaving water temperature is 33 DEG C, 42 DEG C of intake air temperature of secondary heat exchanger (secondary steam of vaporization chamber V10), recirculated water
Inflow temperature is 33 DEG C, and leaving water temperature is 38 DEG C, and three-level heat exchanger (secondary steam of vaporization chamber V9) intake air temperature is 48 DEG C, is followed
Ring water inflow temperature is 38 DEG C, and leaving water temperature is 43 DEG C；(2) secondary steam is returned by the condensed condensation water collection of heat exchanger
For being used to wash silk as water is washed, while on-condensible gas in secondary steam being vacuumized between the spinning practice of viscose glue production system
To 6kpa, it is back to alkali cleaning and adsorption system, first removes the hydrogen sulfide in fixed gas through caustic washing system, then recycle through adsorption system
High altitude discharge after carbon disulfide, produces NaHS with hydrogen sulfide using in caustic soda, recycles carbon disulfide using activated carbon adsorption,
And by the raised recirculated water of temperature in heat exchanger enter closed cooling tower carry out cooling be back to heat exchangers at different levels, closed cooling tower
Inflow temperature is 43 DEG C, and being discharged is 28 DEG C.Closed cooling tower blower wind 5000000m3/ h, spraying amount of water are 5t/h；Work as environment
32 DEG C of temperature are cooled down by blower and shower water auxiliary temperature-reducing are added to meet production requirement.
Comparative analysis:
The technical solution of the application, secondary steam condense in recuperators at different levels, acid bath system flash vaporization room V11
Secondary steam enter first-class heat exchanger, the secondary steam of vaporization chamber V10 enters secondary heat exchanger, the secondary steam of vaporization chamber V9
Into three-level heat exchanger, whole system secondary steam and cooling water system are closed system, and recirculated water only needs once to fill it up with
, and original acid bath system flash distillation V9, V10 and V11 secondary steam is condensed through mixing condenser MK and auxiliary in the prior art
Device HK directly contacts cooling, and cooling water enters open cooling tower cooling, and the hydrogen sulfide contained in water and carbon disulfide volatilization generate
Peculiar smell, while containing sulfide in water, need moment moisturizing to replace, while open cooling tower moisture evaporation loss about 5%.This hair
Bright technique can administer the peculiar smell generated during flash distillation secondary steam cools from source, while can additionally increase in caustic soda
NaHS is produced with hydrogen sulfide, carbon disulfide is recycled using activated carbon adsorption, improves the adsorption rate of carbon disulfide, reduce viscose glue
The production cost of staple fiber, while again benefit can be created by sale NaHS；Furthermore the recirculated water of present invention process not with
Secondary steam contact is flashed, guarantees the cleaning of cooling water, reduces the generation of heat exchanger water side structure, and original technique acid bath system
Flash distillation V9, V10 and V11 secondary steam directly contacts cooling through mixing condenser MK and auxiliary condenser HK, Sulfide in water by
It gradually accumulates, circulating water quality is deteriorated, and influences the vacuum of flash system, reduces evaporation capacity, and need to periodically stop and clear up condensation by mixing
The mesh basket of device MK and auxiliary condenser HK.Present invention process and original process ration can guarantee the even running of flash system, prolong
Long service life of equipment.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization, which comprises the following steps: (1) sour
The secondary steam of bath system flash vaporization room V11 enters first-class heat exchanger, and the secondary steam of vaporization chamber V10 enters secondary heat exchange
Device, the secondary steam of vaporization chamber V9 enter three-level heat exchanger, carry out heat exchange with the recirculated water in heat exchangers at different levels respectively；(2)
Secondary steam is passed through into the condensed condensation water collection reuse of heat exchanger, while on-condensible gas in secondary steam being vacuumized back
With, and the raised recirculated water of temperature in heat exchanger is entered into closed cooling tower and carries out cooling reuse.
2. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization according to claim 1, which is characterized in that step
Suddenly in (1), the secondary steam temperature of the vaporization chamber V9 is 45-50 DEG C, the secondary steam temperature 40-45 of the vaporization chamber V10
DEG C, the secondary steam temperature of the vaporization chamber V11 is 36-40 DEG C.
3. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization according to claim 1, which is characterized in that step
Suddenly in (1), the heat exchanger is dividing wall type heat exchanger.
4. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization according to claim 1, which is characterized in that step
Suddenly in (1), the recirculated water in the first-class heat exchanger, the secondary heat exchanger and the three-level heat exchanger is successively connected by pipeline
Logical, the first-class heat exchanger inflow temperature is 26-30 DEG C, and leaving water temperature is 31-35 DEG C, and the secondary heat exchanger inflow temperature is
31-35 DEG C, leaving water temperature is 36-40 DEG C, and the three-level heat exchanger inflow temperature is 36-40 DEG C, and leaving water temperature is 41-45 DEG C.
5. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization according to claim 1, which is characterized in that step
It suddenly, will be between spinning practice of the recycling condensing water of collection in viscose glue production system in (2).
6. a kind of method of acid bath system flash distillation secondary steam cycling and reutilization according to claim 1, which is characterized in that step
Suddenly in (2), the vacuum degree that the on-condensible gas vacuumizes is 4-7kpa, and the on-condensible gas is taken away by water ring vacuum pump, first passed through
Caustic washing system removes the hydrogen sulfide in fixed gas, then the high altitude discharge after adsorption system recycles carbon disulfide.
7. special according to claim 1 to a kind of any one of 6 methods of acid bath system flash distillation secondary steam cycling and reutilization
Sign is, in step (2), the closed cooling tower inflow temperature is 41-45 DEG C, and leaving water temperature is 26-30 DEG C.
8. special according to claim 1 to a kind of any one of 6 methods of acid bath system flash distillation secondary steam cycling and reutilization
Sign is, in step (2), the fan delivery of the closed cooling tower is 0-5000000m3/ h, spraying amount of water are 0-8.5t/
h。
9. special according to claim 1 to a kind of any one of 6 methods of acid bath system flash distillation secondary steam cycling and reutilization
Sign is, in step (2), the recirculated water after closed cooling tower cooling is back to heat exchangers at different levels, in the closed cooling tower
Can be recycled with water.
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| CN201810902647.1A CN109173311A (en) | 2018-08-09 | 2018-08-09 | A kind of method of acid bath system flash distillation secondary steam cycling and reutilization |
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| CN201810902647.1A CN109173311A (en) | 2018-08-09 | 2018-08-09 | A kind of method of acid bath system flash distillation secondary steam cycling and reutilization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109758780A (en) * | 2019-03-26 | 2019-05-17 | 许达人 | Acid bath flash crystallization device and technique |
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| US6076369A (en) * | 1998-01-28 | 2000-06-20 | Mitsubishi Heavy Industries, Ltd. | Evaporative concentration apparatus for waste water |
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| 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 |
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| CN109758780A (en) * | 2019-03-26 | 2019-05-17 | 许达人 | Acid bath flash crystallization device and technique |
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Application publication date: 20190111 |