CN104436742B - The CS that a kind of short rayon fiber is produced2Recovery method - Google Patents
The CS that a kind of short rayon fiber is produced2Recovery method Download PDFInfo
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Abstract
The present invention relates to spining technology field, specifically refer to the CS that a kind of short rayon fiber is produced2Recovery method, the mixed vapour that plasticizing groove produces, by wireway, through precooling step, separates the water condensation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser, in atomization condenser, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery. By CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, realizes the atomized water nuclei of condensation. This method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
Description
Technical field
The present invention relates to spining technology field, specifically refer to the CS that a kind of short rayon fiber is produced2Recovery method.
Background technology
CS in short fiber production process2The size of the rate of recovery, is directly connected to the value of the carrying consumption reduction of enterprise and reduces CS2Reducing exhaust emission environmental pollution, improves the industrial competition of enterprise. The CS of existing short rayon fiber2Equipment that recovery system comprises has: plasticizing groove, condenser, cooling tower systems, CS2 recycling can; Main flow process is as follows: the CS2 gas steaming from plasticizing groove enters condenser by large conduit, go by condenser two-stage is cold, the water condensing and CS2(liquid) flow automatically to CS2 recycling can, wherein water overflow is walked, CS2 after separation is stored in recycling can, and while 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, name is called the patent of invention of " recovery and treatment method of sulfur-bearing mix waste gas in a kind of viscose rayon production ", its technical scheme is: the present invention relates to the recovery and treatment method of sulfur-bearing mix waste gas in a kind of viscose rayon production, belong 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, a kind of new technology path has been proposed, first the sulphur-containing exhaust gas of low concentration is carried out to pretreatment, then adopt spray-absorption technology optionally to absorb it, subsequently absorption liquid is processed, finally obtained the product that sexual valence is higher.
Waste gas is directly carried out alkali spray by above-mentioned patent, but this mode reclaims CS2The defect existing is CS2The rate of recovery is low, generally can only reach 40% left and right; The steam thermal energy and the steam that are steamed by plasticizing groove can not be recycled; Condensation CS2And water vapour need consume a large amount of cold water or chilled water; Equipment investment and occupation of land are large, and maintenance is frequent.
Summary of the invention
For solving existing CS2The problems referred to above that recovery method exists, propose now one and can improve CS2The rate of recovery, reduces equipment investment and reduces plant maintenance, and reduces the CS of a kind of short rayon fiber production of energy consumption2Recovery 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 produced2Recovery method, is characterized in that: the mixed vapour that plasticizing groove produces, by wireway, through precooling step, separates the water condensation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser, in atomization condenser, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μ m.
In plasticizing groove, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140℃-160 DEG C, described saturated vapor forms mixed vapour with plastifying the gas of discharging in 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 described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into2The temperature of liquid is less than 27 DEG C.
Depress described CS at a normal atmosphere2The gas set point of gas in atomization condenser is less than 46.2 DEG C.
The CS that uses a kind of short rayon fiber of this method to produce2Recovery system comprises plasticizing groove, precondenser, atomization condenser, CS2Recycling can and sewage overflow tank, described plasticizing groove is connected with precondenser by wireway, and described precondenser is connected with atomization condenser, described CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off.
Described precondenser bottom is connected with overflow tank.
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.
In described atomization condenser, be provided with high-pressure hydraulic pump atomizer.
The water inlet of described atomization condenser and refrigeration cross current.
The tail gas outlet of described atomization condenser is connected with air draft supervisor.
The delivery port of described atomization condenser and CS2Recycling can water inlet is connected.
Described CS2Between recycling can and sewage overflow pipe, be communicated with clear water house steward.
Described CS2The gas outlet place of the gas outlet of recycling can and sewage overflow pipe is connected with filter jointly, and described filter is connected with CS2Reservoir area pipeline.
The invention has the advantages that:
1, the present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
3, the application is provided with pre-cold-peace master cold (being spray congealing), effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load.
4, the main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Brief description of the drawings
Fig. 1 is flow chart of the present invention.
Fig. 2 is present device connection layout.
Plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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, CS2Reservoir area pipeline 16.
Detailed description of the invention
Embodiment 1
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
Embodiment 2
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μ m. In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140℃-160 DEG C, described saturated vapor forms mixed vapour with plastifying the gas of discharging in 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 described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into2The temperature of liquid is less than 27 DEG C. Depress described CS at a normal atmosphere2The gas set point of gas in atomization condenser 3 is less than 46.2 DEG C.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
Embodiment 3
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 12 μ m. 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 plastifying the gas of discharging in 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 described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into2The temperature of liquid is less than 27 DEG C. Depress described CS at a normal atmosphere2The gas set point of gas in atomization condenser 3 is less than 46.2 DEG C.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
Embodiment 4
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 8 μ m. In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 5Kg, and temperature is 140℃, described saturated vapor forms mixed vapour with plastifying the gas of discharging in 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 described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into227 DEG C of the temperature of liquid. Depress described CS at a normal atmosphere246.2 DEG C of the gas set point of gas in atomization condenser 3.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
Embodiment 5
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 10 μ m. 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 plastifying the gas of discharging in 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, 90 DEG C of leaving water temperatures after precooling. After described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into225 DEG C of the temperature of liquid. Depress described CS at a normal atmosphere245 DEG C of the gas set point of gas in atomization condenser 3.
Embodiment 6
The CS that a kind of short rayon fiber is produced2Recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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 CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off. It is spray congealing that the application is provided with pre-cold-peace master cold, effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load. The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Embodiment 7
The CS that a kind of short rayon fiber is produced2Recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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 CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off.
Precondenser 2 bottoms are connected with overflow tank 8. 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. In atomization condenser 3, be provided with high-pressure hydraulic pump atomizer 11. The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12. The tail gas outlet of atomization condenser 3 is connected with air draft supervisor 13. The delivery port of atomization condenser 3 and CS2Recycling can 4 water inlets are connected.
It is spray congealing that the application is provided with pre-cold-peace master cold, effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load. The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Embodiment 8
The CS that a kind of short rayon fiber is produced2Recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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 CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off.
Precondenser 2 bottoms are connected with overflow tank 8. 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. In atomization condenser 3, be provided with high-pressure hydraulic pump atomizer 11. The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12. The tail gas outlet of atomization condenser 3 is connected with air draft supervisor 13. The delivery port of atomization condenser 3 and CS2Recycling can 4 water inlets are connected.
Described CS2Between recycling can 4 and sewage overflow pipe, be communicated with clear water house steward 14. Described CS2The gas outlet place of the gas outlet of recycling can 4 and sewage overflow pipe is connected with filter 15 jointly, and described filter 15 is connected with CS2Reservoir area pipeline 16.
It is spray congealing that the application is provided with pre-cold-peace master cold, effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load. The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Embodiment 9
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
The CS that uses a kind of short rayon fiber of this method to produce2Recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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 CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off.
Precondenser 2 bottoms are connected with overflow tank 8. 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. In atomization condenser 3, be provided with high-pressure hydraulic pump atomizer 11. The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12. The tail gas outlet of atomization condenser 3 is connected with air draft supervisor 13. The delivery port of atomization condenser 3 and CS2Recycling can 4 water inlets are connected.
It is spray congealing that the application is provided with pre-cold-peace master cold, effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load. The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Embodiment 10
The CS that a kind of short rayon fiber is produced2Recovery method, in the production technology of short fiber tow, when tow process plasticizing groove 1, the mixed vapour that plasticizing groove 1 produces is by wireway 6, through precooling step, by the water condensation separation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser 3, in atomization condenser 3, is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser 3 drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery.
The atomized water drop diameter of atomizer ejection is 8-12 μ m. In plasticizing groove 1, input saturated vapor, the pressure of described saturated vapor is 3-5Kg, and temperature is 140℃-160 DEG C, described saturated vapor forms mixed vapour with plastifying the gas of discharging in 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 described precooling, water outlet adds after normal temperature soft water, and 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 CS2The gas CS forming that congeals into2The temperature of liquid is less than 27 DEG C. Depress described CS at a normal atmosphere2The gas set point of gas in atomization condenser 3 is less than 46.2 DEG C.
The present invention has overcome traditional C/S2In 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 CS2Condensation temperature drops to set point; And by the atomized water CS that condenses2Gas, 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 converted in solid-state condensation process by liquid state, play the particle of condensation nuclei effect, and it can accelerate rate of set. So this method can improve CS2Condensation rate, allows CS2Condensation is reclaimed rapidly, reduces from tail gas stream vector, improves CS thereby reach2The rate of recovery.
The CS that uses the equipment of this method to produce for a kind of short rayon fiber2Recovery system, comprises plasticizing groove 1, precondenser 2, atomization condenser 3, CS2Recycling 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 CS2Recycling 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 be realized CS2The secondary precipitation of liquid and prevent CS2The effect of running off.
Precondenser 2 bottoms are connected with overflow tank 8. 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. In atomization condenser 3, be provided with high-pressure hydraulic pump atomizer 11. The water inlet of atomization condenser 3 is communicated with refrigeration water pipe 12. The tail gas outlet of atomization condenser 3 is connected with air draft supervisor 13. The delivery port of atomization condenser 3 and CS2Recycling can 4 water inlets are connected.
Described CS2Between recycling can 4 and sewage overflow pipe, be communicated with clear water house steward 14. Described CS2The gas outlet place of the gas outlet of recycling can 4 and sewage overflow pipe is connected with filter 15 jointly, and described filter 15 is connected with CS2Reservoir area pipeline 16.
It is spray congealing that the application is provided with pre-cold-peace master cold, effectively by higher temperature can utilizing by reuse thermal energy collecting; And reduce and utilize cooling tower and the cooling recovery of chilled water CS2Time load. The main cold investment of tradition is large, difficult in maintenance, simultaneously because condensation CS2In time, can separate out elemental sulfur, is bonded on condenser tubulation, normally carries out for ensureing to produce, therefore need monthly stop production, condenser is carried out to clean and maintenance. Adopt this case can reduce tradition main cold cost of investment and maintenance time and expense. The present invention separates out obstruction tubulation without consideration elemental sulfur and causes device efficiency to reduce, therefore can long-play.
Claims (6)
1. the CS that short rayon fiber is produced2Recovery method, is characterized in that: the mixed vapour that plasticizing groove (1) produces, by wireway (6), through precooling step, separates the water condensation in mixed vapour; CS in mixed vapour2Gas enters to atomization condenser (3), in atomization condenser (3), is sprayed by atomizer by pressurized water, realizes spray congealing, realizes the effect of heat absorption, when temperature in atomization condenser (3) drops to CS with this2When gas set point, CS2The gas CS that congeals into2Liquids recovery; The atomized water drop diameter of atomizer ejection is 8-12 μ m; 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, the gas formation mixed vapour of discharging in described saturated vapor and plasticizing groove (1), and the temperature of described mixed vapour is 100 DEG C-110 DEG C.
2. the CS that a kind of short rayon fiber according to claim 1 is produced2Recovery method, is characterized in that: 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.
3. the CS that a kind of short rayon fiber according to claim 1 is produced2Recovery method, is characterized in that: after described precooling, water outlet adds after normal temperature soft water, and water temperature remains 60-70 DEG C, and transfers to refining washing step.
4. the CS that a kind of short rayon fiber according to claim 1 is produced2Recovery method, is characterized in that: the pressure of described pressurized water is greater than 1MPa, and temperature is 20-30 DEG C.
5. the CS that a kind of short rayon fiber according to claim 4 is produced2Recovery method, is characterized in that: described CS2The gas CS forming that congeals into2The temperature of liquid is less than 27 DEG C.
6. the CS that a kind of short rayon fiber according to claim 5 is produced2Recovery method, is characterized in that: depress described CS at a normal atmosphere2The gas set point of gas in atomization condenser (3) is less than 46.2 DEG C.
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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 |
| 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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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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