CN104436742A - CS2 recovery method for viscose staple fiber production - Google Patents
CS2 recovery method for viscose staple fiber production Download PDFInfo
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- CN104436742A CN104436742A CN201410556021.1A CN201410556021A CN104436742A CN 104436742 A CN104436742 A CN 104436742A CN 201410556021 A CN201410556021 A CN 201410556021A CN 104436742 A CN104436742 A CN 104436742A
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Abstract
The invention relates to the technical field of spinning, and in particular relates to a CS2 recovery method for viscose staple fiber production. Mixed steam produced in a plasticizing tank penetrates through a gas guiding tube and is subjected to pre-cooling, and water in the mixed steam is condensed and separated; CS2 gas in the mixed steam is introduced into an atomizing condenser; pressurizing water is sprayed out by virtue of an atomizing spray head in the atomizing condenser so as to realize atomizing condensation, and therefore, a heat absorption effect is realized; when the temperature in the atomizing condenser is reduced to a condensation point of the CS2 gas, the CS2 gas is condensed into CS2 liquid for being recovered; the condensation temperature of CS2 is reduced to a condensation point; the CS2 gas is condensed by virtue of atomizing water to realize atomizing water condensation nucleus. According to the method, the condensation speed of CS2 can be increased, CS2 can be rapidly condensed and recovered, the loss amount of the tail gas is reduced, and the CS2 recovery rate is increased.
Description
Technical field
The present invention relates to spining technology field, specifically refer to the CS that a kind of short rayon fiber is produced
2recovery method.
Background technology
CS in short fiber production process
2the size of the rate of recovery, is directly connected to carrying value consumption reduction and reducing CS of enterprise
2discharge reduces environmental pollution, improves the industrial competition of enterprise.The CS of existing short rayon fiber
2equipment that recovery system comprises has: plasticizing groove, condenser, cooling tower systems, CS2 recycling can; Main flow is as follows: the CS2 gas steamed from plasticizing groove enters condenser by large conduit, go by condenser two-stage is cold, the water condensed and CS2(liquid) flow automatically to CS2 recycling can, wherein water overflow is walked, CS2 after separation is stored in recycling can, and when reaching certain volume, force feed is back to use in production.
If number of patent application is CN201410002204.9, the applying date is 2014-01-03, the patent of invention that name is called " a kind of viscose rayon produce in the recovery and treatment method of sulfur-bearing mix waste gas ", its technical scheme is: the recovery and treatment method that the present invention relates to sulfur-bearing mix waste gas in the production of a kind of viscose rayon, belongs to the processing technology field of sulphur-containing exhaust gas in viscose rayon production.The present invention is directed to current viscose rayon manufacturing enterprise exhaust-gas treatment situation, propose a kind of technical strategies, first pretreatment is carried out to the sulphur-containing exhaust gas of low concentration, then spray-absorption technology is adopted optionally to absorb it, subsequently absorbing liquid is processed, the product that final acquisition sexual valence is higher.
Waste gas is directly carried out alkali spray by above-mentioned patent, but this mode reclaims CS
2the defect existed is CS
2the rate of recovery is low, generally can only reach about 40%; The steam thermal energy steamed by plasticizing groove and steam can not be recycled; Condensation CS
2and water vapour need consume a large amount of cold water or chilled water; Greatly, maintenance is frequent for equipment investment and occupation of land.
Summary of the invention
For solving existing CS
2the problems referred to above that recovery method exists, proposing one now can improve CS
2the rate of recovery, reduces equipment investment and reduces plant maintenance, and the CS that a kind of short rayon fiber reducing energy consumption is produced
2recovery method.
For realizing above-mentioned technical purpose, technical scheme of the present invention is as follows:
The CS that a kind of short rayon fiber is produced
2recovery method, is characterized in that: the water condensation in mixed vapour, by wireway, through precooling step, is separated by the mixed vapour that plasticizing groove produces; CS in mixed vapour
2gas enters to atomization condenser, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser by pressurized water by atomizer, when in atomization condenser, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μm.
In plasticizing groove, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140
dEG C-160 DEG C, described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove, and the temperature of described mixed vapour is 100 DEG C-110 DEG C.
In described precooling step, wireway carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 20-30 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.
After after described precooling, water outlet adds normal temperature soft water, water temperature remains 60-70 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 20-30 DEG C.
Described CS
2the CS that gas congeals into
2the temperature of liquid is less than 27 DEG C.
A normal atmosphere pressure, described CS
2the gas condensation point of gas in atomization condenser is less than 46.2 DEG C.
Use the CS that a kind of short rayon fiber of this method is produced
2recovery system comprises plasticizing groove, precondenser, atomization condenser, CS
2recycling can and sewage overflow tank, described plasticizing groove is connected with precondenser by wireway, and described precondenser is connected with atomization condenser, described CS
2recycling can is connected with atomization condenser, and described sewage overflow tank is connected on the outlet of sewer end of CS2 recycling can, and sewage overflow tank can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.
Overflow tank is connected with bottom described precondenser.
Described overflow tank is communicated with plasticizing groove.
The water inlet of described precondenser is connected with soft water pipeline, and the delivery port on described precondenser is connected with refining washing pipeline.
High-pressure hydraulic pump atomizer is provided with in described atomization condenser.
Water inlet and the refrigeration cross current of described atomization condenser.
The offgas outlet of described atomization condenser is responsible for air draft and is connected.
The delivery port of described atomization condenser and CS
2recycling can water inlet is connected.
Described CS
2clear water house steward is communicated with between recycling can and sewage overflow pipe.
Described CS
2the gas outlet of recycling can and the gas outlet place of sewage overflow pipe are connected with filter jointly, and described filter is connected with CS
2reservoir area pipeline.
The invention has the advantages that:
1, instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.
2, the application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
3, the application is provided with pre-cold-peace master cold (i.e. spray congealing), effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.
4, the main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Fig. 2 is present device connection layout.
Plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4, sewage overflow tank 5, wireway 6, outlet of sewer end 7, overflow tank 8, soft water pipeline 9, refining washing pipeline 10, high-pressure hydraulic pump atomizer 11, refrigeration water pipe 12, air draft supervisor 13, clear water house steward 14, filter 15, CS
2reservoir area pipeline 16.
Detailed description of the invention
Embodiment 1
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Embodiment 2
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μm.In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140
dEG C-160 DEG C, described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove 1, and the temperature of described mixed vapour is 100 DEG C-110 DEG C.
In described precooling step, wireway 6 carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 20-30 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.After after described precooling, water outlet adds normal temperature soft water, water temperature remains 60-70 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 20-30 DEG C.Described CS
2the CS that gas congeals into
2the temperature of liquid is less than 27 DEG C.A normal atmosphere pressure, described CS
2the gas condensation point of gas in atomization condenser 3 is less than 46.2 DEG C.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Embodiment 3
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 12 μm.In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 3Kg, and temperature is 160 DEG C, and described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove 1, and the temperature of described mixed vapour is 100 DEG C.
In described precooling step, wireway 6 carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 30 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.After after described precooling, water outlet adds normal temperature soft water, water temperature remains 60 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 30 DEG C.Described CS
2the CS that gas congeals into
2the temperature of liquid is less than 27 DEG C.A normal atmosphere pressure, described CS
2the gas condensation point of gas in atomization condenser 3 is less than 46.2 DEG C.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Embodiment 4
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 8 μm.In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 5Kg, and temperature is 140
dEG C, described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove 1, and the temperature of described mixed vapour is 110 DEG C.
In described precooling step, wireway 6 carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 20 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.After after described precooling, water outlet adds normal temperature soft water, water temperature remains 70 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 20 DEG C.Described CS
2the CS that gas congeals into
2the temperature of liquid 27 DEG C.A normal atmosphere pressure, described CS
2the gas condensation point 46.2 DEG C of gas in atomization condenser 3.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Embodiment 5
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 10 μm.In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 4Kg, and temperature is 150 DEG C, and described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove 1, and the temperature of described mixed vapour is 105 DEG C.
In described precooling step, wireway 6 carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 25 DEG C, leaving water temperature 90 DEG C after precooling.After after described precooling, water outlet adds normal temperature soft water, water temperature remains 65 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 25 DEG C.Described CS
2the CS that gas congeals into
2the temperature of liquid 25 DEG C.A normal atmosphere pressure, described CS
2the gas condensation point 45 DEG C of gas in atomization condenser 3.
Embodiment 6
The CS that a kind of short rayon fiber is produced
2recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4 and sewage overflow tank 5, described plasticizing groove 1 is connected with precondenser 2 by wireway 6, and described precondenser 2 is connected with atomization condenser 3, described CS
2recycling can 4 is connected with atomization condenser 3, and described sewage overflow tank 5 is connected on the outlet of sewer end 7 of CS2 recycling can 4, and sewage overflow tank 5 can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.The application is provided with the cold i.e. spray congealing of pre-cold-peace master, effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Embodiment 7
The CS that a kind of short rayon fiber is produced
2recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4 and sewage overflow tank 5, described plasticizing groove 1 is connected with precondenser 2 by wireway 6, and described precondenser 2 is connected with atomization condenser 3, described CS
2recycling can 4 is connected with atomization condenser 3, and described sewage overflow tank 5 is connected on the outlet of sewer end 7 of CS2 recycling can 4, and sewage overflow tank 5 can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.
Overflow tank 8 is connected with bottom precondenser 2.Overflow tank 8 is communicated with plasticizing groove 1.The water inlet of precondenser 2 is connected with soft water pipeline 9, and the delivery port on described precondenser 2 is connected with refining washing pipeline 10.High-pressure hydraulic pump atomizer 11 is provided with in atomization condenser 3.The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12.The offgas outlet of atomization condenser 3 is responsible for 13 with air draft and is connected.The delivery port of atomization condenser 3 and CS
2recycling can 4 water inlet is connected.
The application is provided with the cold i.e. spray congealing of pre-cold-peace master, effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Embodiment 8
The CS that a kind of short rayon fiber is produced
2recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4 and sewage overflow tank 5, described plasticizing groove 1 is connected with precondenser 2 by wireway 6, and described precondenser 2 is connected with atomization condenser 3, described CS
2recycling can 4 is connected with atomization condenser 3, and described sewage overflow tank 5 is connected on the outlet of sewer end 7 of CS2 recycling can 4, and sewage overflow tank 5 can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.
Overflow tank 8 is connected with bottom precondenser 2.Overflow tank 8 is communicated with plasticizing groove 1.The water inlet of precondenser 2 is connected with soft water pipeline 9, and the delivery port on described precondenser 2 is connected with refining washing pipeline 10.High-pressure hydraulic pump atomizer 11 is provided with in atomization condenser 3.The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12.The offgas outlet of atomization condenser 3 is responsible for 13 with air draft and is connected.The delivery port of atomization condenser 3 and CS
2recycling can 4 water inlet is connected.
Described CS
2clear water house steward 14 is communicated with between recycling can 4 and sewage overflow pipe.Described CS
2the gas outlet of recycling can 4 and the gas outlet place of sewage overflow pipe are connected with filter 15 jointly, and described filter 15 is connected with CS
2reservoir area pipeline 16.
The application is provided with the cold i.e. spray congealing of pre-cold-peace master, effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Embodiment 9
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Use the CS that a kind of short rayon fiber of this method is produced
2recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4 and sewage overflow tank 5, described plasticizing groove 1 is connected with precondenser 2 by wireway 6, and described precondenser 2 is connected with atomization condenser 3, described CS
2recycling can 4 is connected with atomization condenser 3, and described sewage overflow tank 5 is connected on the outlet of sewer end 7 of CS2 recycling can 4, and sewage overflow tank 5 can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.
Overflow tank 8 is connected with bottom precondenser 2.Overflow tank 8 is communicated with plasticizing groove 1.The water inlet of precondenser 2 is connected with soft water pipeline 9, and the delivery port on described precondenser 2 is connected with refining washing pipeline 10.High-pressure hydraulic pump atomizer 11 is provided with in atomization condenser 3.The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12.The offgas outlet of atomization condenser 3 is responsible for 13 with air draft and is connected.The delivery port of atomization condenser 3 and CS
2recycling can 4 water inlet is connected.
The application is provided with the cold i.e. spray congealing of pre-cold-peace master, effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Embodiment 10
The CS that a kind of short rayon fiber is produced
2recovery method, in the production technology of short fiber tow, tow is when plasticizing groove 1, and the water condensation in mixed vapour, by wireway 6, through precooling step, is separated by the mixed vapour that plasticizing groove 1 produces; CS in mixed vapour
2gas enters to atomization condenser 3, is sprayed, realizes spray congealing, realize the effect of heat absorption with this in atomization condenser 3 by pressurized water by atomizer, when in atomization condenser 3, temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μm.In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140
dEG C-160 DEG C, described saturated vapor forms mixed vapour with the gas of discharging in plasticizing groove 1, and the temperature of described mixed vapour is 100 DEG C-110 DEG C.
In described precooling step, wireway 6 carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 20-30 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.After after described precooling, water outlet adds normal temperature soft water, water temperature remains 60-70 DEG C, and transfers to refining washing step.
The pressure of described pressurized water is greater than 1MPa, and temperature is 20-30 DEG C.Described CS
2the CS that gas congeals into
2the temperature of liquid is less than 27 DEG C.A normal atmosphere pressure, described CS
2the gas condensation point of gas in atomization condenser 3 is less than 46.2 DEG C.
Instant invention overcomes traditional C/S
2in removal process, the rate of recovery is low, and heat energy can not reclaim, and operating cost is large, the shortcoming that equipment needs fixed time cleaning to safeguard.The application is by CS
2condensation temperature drops to set point; And to be condensed CS by atomized water
2gas, realizes the atomized water nuclei of condensation, and the nuclei of condensation refer to that material is converted in liquid or solid-state condensation process by gaseous state, or are in solid-state condensation process by liquid conversion, and play the particle of condensation nuclei effect, it can accelerate rate of set.So this method can improve CS
2condensation rate, allows CS
2rapid condensation is reclaimed, and reduces from tail gas stream vector, thus reaches raising CS
2the rate of recovery.
Use the CS that the equipment of this method is produced for a kind of short rayon fiber
2recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS
2recycling can 4 and sewage overflow tank 5, described plasticizing groove 1 is connected with precondenser 2 by wireway 6, and described precondenser 2 is connected with atomization condenser 3, described CS
2recycling can 4 is connected with atomization condenser 3, and described sewage overflow tank 5 is connected on the outlet of sewer end 7 of CS2 recycling can 4, and sewage overflow tank 5 can realize CS
2the secondary precipitation of liquid and prevent CS
2the effect of running off.
Overflow tank 8 is connected with bottom precondenser 2.Overflow tank 8 is communicated with plasticizing groove 1.The water inlet of precondenser 2 is connected with soft water pipeline 9, and the delivery port on described precondenser 2 is connected with refining washing pipeline 10.High-pressure hydraulic pump atomizer 11 is provided with in atomization condenser 3.The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12.The offgas outlet of atomization condenser 3 is responsible for 13 with air draft and is connected.The delivery port of atomization condenser 3 and CS
2recycling can 4 water inlet is connected.
Described CS
2clear water house steward 14 is communicated with between recycling can 4 and sewage overflow pipe.Described CS
2the gas outlet of recycling can 4 and the gas outlet place of sewage overflow pipe are connected with filter 15 jointly, and described filter 15 is connected with CS
2reservoir area pipeline 16.
The application is provided with the cold i.e. spray congealing of pre-cold-peace master, effectively higher for temperature can be utilized by reuse thermal energy collecting; And minimizing utilizes cooling tower and chilled water cooling to reclaim CS
2time load.The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS
2elemental sulfur can be separated out by time, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore monthly need stop production and carry out clean and maintenance to condenser.Adopt this case can reduce the main cold cost of investment of tradition and maintenance time and expense.The present invention, therefore can long-play without the need to considering that elemental sulfur is separated out blocking tubulation and caused device efficiency to reduce.
Claims (8)
1. the CS of a short rayon fiber production
2recovery method, is characterized in that: the water condensation in mixed vapour, by wireway (6), through precooling step, is separated by the mixed vapour that plasticizing groove (1) produces; CS in mixed vapour
2gas enters to atomization condenser (3), is sprayed, realize spray congealing in atomization condenser (3) by pressurized water by atomizer, realizes the effect of heat absorption with this, when in atomization condenser (3), temperature drops to CS
2during gas condensation point, CS
2gas congeals into CS
2liquids recovery.
2. the CS of a kind of short rayon fiber production according to claim 1
2recovery method, is characterized in that: the atomized water drop diameter of atomizer ejection is 8-12 μm.
3. the CS of a kind of short rayon fiber production according to claim 1
2recovery method, is characterized in that: input saturated vapor in plasticizing groove (1), the pressure of described saturated vapor is 3-5Kg, and temperature is 140
dEG C-160 DEG C, described saturated vapor forms mixed vapour with the middle gas of discharging of plasticizing groove (1), and the temperature of described mixed vapour is 100 DEG C-110 DEG C.
4. the CS of a kind of short rayon fiber production according to claim 3
2recovery method, is characterized in that: in described precooling step, and wireway (6) carries out precooling by normal temperature soft water, and the inflow temperature of described normal temperature soft water is 20-30 DEG C, and after precooling, leaving water temperature is greater than 80 DEG C.
5. the CS of a kind of short rayon fiber production according to claim 1
2recovery method, is characterized in that: after after described precooling, water outlet adds normal temperature soft water, water temperature remains 60-70 DEG C, and transfers to refining washing step.
6. the CS of a kind of short rayon fiber production according to claim 1
2recovery method, is characterized in that: the pressure of described pressurized water is greater than 1MPa, and temperature is 20-30 DEG C.
7. the CS of a kind of short rayon fiber production according to claim 6
2recovery method, is characterized in that: described CS
2the CS that gas congeals into
2the temperature of liquid is less than 27 DEG C.
8. the CS of a kind of short rayon fiber production according to claim 7
2recovery method, is characterized in that: a normal atmosphere pressure, described CS
2the gas condensation point of gas in atomization condenser (3) is less than 46.2 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110885084A (en) * | 2019-12-11 | 2020-03-17 | 宜宾丝丽雅股份有限公司 | Condensation recycling method and system for carbon disulfide in viscose fiber production |
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| CN101274203A (en) * | 2007-12-27 | 2008-10-01 | 唐山三友集团兴达化纤有限公司 | Method for removing carbon disulfide gas in production process of viscose fiber |
| CN101530713A (en) * | 2009-03-16 | 2009-09-16 | 上海同济建设科技有限公司 | Recovering and purifying device of organic solvent and method |
| CN102225244A (en) * | 2011-05-13 | 2011-10-26 | 安徽禾盛生物能源有限公司 | Grading type condensing device for coal/biomass pyrolysis equipment |
| CN103772250A (en) * | 2014-01-03 | 2014-05-07 | 宜宾丝丽雅股份有限公司 | Method for recovery processing sulfur-containing mixed waste gas in production of viscose |
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2014
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Patent Citations (4)
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|---|---|---|---|---|
| CN101274203A (en) * | 2007-12-27 | 2008-10-01 | 唐山三友集团兴达化纤有限公司 | Method for removing carbon disulfide gas in production process of viscose fiber |
| CN101530713A (en) * | 2009-03-16 | 2009-09-16 | 上海同济建设科技有限公司 | Recovering and purifying device of organic solvent and method |
| CN102225244A (en) * | 2011-05-13 | 2011-10-26 | 安徽禾盛生物能源有限公司 | Grading type condensing device for coal/biomass pyrolysis equipment |
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| CN110885084A (en) * | 2019-12-11 | 2020-03-17 | 宜宾丝丽雅股份有限公司 | Condensation recycling method and system for carbon disulfide in viscose fiber production |
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