CN105016312A - Recycling utilization method for sulfur-contained waste material in production of sodium hydrosulfite - Google Patents
Recycling utilization method for sulfur-contained waste material in production of sodium hydrosulfite Download PDFInfo
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Abstract
The invention discloses a recycling utilization method for a sulfur-contained waste material in production of sodium hydrosulfite, belonging to the field of waste recycling. The recycling utilization method comprises the following steps: step 1, subjecting the sulfur-contained waste material to separation so as to obtain an clear organic matter liquid and a mixed inorganic salt; step 2, washing the obtained mixed inorganic salt with methanol, and carrying out recycling so as to obtain an inorganic salt product; step 3, introducing the clear organic matter liquid into a low-temperature sulphur burning furnace, and carrying out mixing and burning with sulphur so as to obtain SO2-contained first furnace gas, etc.; step 4, introducing the first furnace gas into a high-temperature sulphur burning furnace, and carrying out mixing and burning with sulphur so as to obtain SO2-contained second furnace gas, etc.; and step 5, subjecting the SO2-contained second furnace gas obtained in the step 4 to cooling and purifying and then introducing the obtained gas into an absorption tower so as to recycle SO2. The novel recycling utilization method for the surfur-contained waste material creatively provided by the invention has the following advantages: surfur recycling rate reaches more than 99%; high added-value products like sodium sulfite are obtained; meanwhile, service time of a sulphur burning furnace equipment is effectively prolonged; and great benefits in the aspects of production process, economic benefits and the like are brought for enterprises.
Description
Technical field
The invention belongs to field of waste recycle, more specifically, relate to the method that in the production of a kind of vat powder, sulfur containing waste material is recycled.
Background technology
Existing vat powder manufacturing enterprise produces unnecessary mother liquor to vat powder and usually adopts following technical process: vat powder produce unnecessary mother liquor through add alkali neutralization and filter obtain S-WAT and in and mother liquor; In and mother liquor obtain methyl alcohol and distillation residual liquid through rectifying.The composition of distillation residual liquid is mainly: sodium formiate about 10%; Other salts 2 ~ 3% such as S-WAT; Organism 2 ~ 3%; Water about 80%.The treatment process that distillation residual liquid is general is: distillation residual liquid, through condensing crystal, methanol extraction, reclaims sodium formiate wherein.Methanol extraction liquid contains salt and organism.Methanol extraction liquid enters evaporating kettle, evaporates recycling design methyl alcohol in evaporating kettle.After recycling design methyl alcohol, obtain the thick liquid at the bottom of evaporating kettle still and sulfur containing waste material; Or distillation residual liquid obtains sulfur containing waste material after the art breading such as concentrated.Described sulfur containing waste material carries out burning disposal usually.
Described sulfur containing waste material is with strong pungent odor, and main component is inorganic salt and sulfurous organic compound, and wherein inorganic salt are mainly: S-WAT, sodium carbonate, bunte salts etc.; Sulfurous organic compound is mainly: dihydroxyethylsulfide, dithio di-methylcarbinol, mercaptoethanol etc.
Existing sulfur containing waste material directly burns usually, namely diesel oil and/or the used oil of recovery, freezing wet goods fuel heating flame stove is adopted, decomposable harmful substances, discharge after the waste gas of generation carries out purifying treatment by Dual alkali, the slag of generation then carries out the mode process such as landfill.This technique weak point is: easily produce Crystallization Plugging after the inorganic salts cooling in sulfur containing waste material, slag is a lot, cannot run continuously for a long time.In addition, need to use oil fuel cost higher, and device structure is complicated; The more important thing is the product that cannot obtain added value.
Summary of the invention
The technical problem to be solved in the present invention is the defect overcoming prior art, a kind of method that in providing vat powder to produce, sulfur containing waste material is recycled.Described method can farthest turn waste into wealth, and fully reclaim inorganic salt and the sulfur component of sulfur containing waste material, avoid the damage that inorganic salts causes equipment, waste disposal cost is low simultaneously.
the present invention is achieved through the following technical solutions:
The method that in vat powder production, sulfur containing waste material is recycled, comprises the following steps:
S1. sulfur containing waste material is obtained organism clear liquid and mixed inorganic through separation;
S2. described mixed inorganic is after methanol wash, is separated and obtains the first inorganic salt product;
S3. the organism clear liquid in described S1 passes in low temperature sulfur furnace, and with sulphur mixed burning, incineration temperature is 500 ~ 650 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas;
S4. SO is contained in described S3
2the first furnace gas pass in high temperature sulfur furnace, with sulphur mixed burning, incineration temperature is 700 ~ 1000 DEG C, obtains the 3rd inorganic salt product and containing SO
2the second furnace gas;
S5. SO is contained in described S4
2the second furnace gas send in absorption tower and carry out SO after overcooling, purification
2recovery.
The method that in vat powder production of the present invention, sulfur containing waste material is recycled first have employed the preposition Ficus caricaL that removes and overcomes the impact of a large amount of inorganic salt on follow-up burning process, make organic compound combustion more abundant, reduce the amount that element sulphur is taken away with molten salt etc., and can combustion time be substantially reduced, and the auxiliary energy of consumption needed for reducing; In addition, also help the operation of sulfur furnace, the generation of slag can be reduced simultaneously, the operation that maintenance equipment is permanently effective, moreover preposition the first inorganic salt product main component obtained except Ficus caricaL is S-WAT, be high added value product, overcome sulfur containing waste material direct burning disposal and S-WAT is destroyed and produces low value-added sodium sulfate.Described second inorganic salt product and the 3rd inorganic salt product are mainly containing sodium sulfate etc.
Because sulfur containing waste material in the present invention have passed through preposition except Ficus caricaL, make the composition of the organism clear liquid of acquisition and physico-chemical property and sulfur containing waste material have remarkable difference, the technique (as incineration temperature, feeding quantity, flue gas separating technology etc.) of follow-up burning is had an impact.The present invention creatively adopts sulphur and organism clear liquid to carry out mixed burning, effectively overcome the problem brought that organism clear liquid burns on the one hand, sulphur burns and provides heat on the other hand, no longer need external ignition dope (heavy oil, Sweet natural gas, liquefied gas etc.), optimize production technique and equipment; Moreover add the source that sulphur supplements sulphur, add the SO in waste gas from incinerator
2content is follow-up SO
2recovery provide possibility, and improve the quality of product.
According to the physico-chemical property of organism clear liquid, the present invention creatively adopts sectional type burning method.First organism clear liquid through 500 ~ 650 DEG C low temperature burn, a small amount of inorganic salt fall into bottom low temperature sulfur furnace, through collection after for regulating S-WAT or Sodium Hydrosulfite Content.In low temperature sulfur furnace, in organism, part element sulphur is oxidized to SO
2, organism, by preliminary exposition, produces containing SO
2the first furnace gas.Afterwards, containing SO
2the first furnace gas enter high temperature sulfur furnace again, with the sulphur added at 700 ~ 1000 DEG C of mixed burnings, the element sulphur in furnace gas is fully oxidized as SO
2, organism is thoroughly decomposed.
In order to overcome in organism clear liquid, inorganic salts ingredients is to the disadvantageous effect of organic compound combustion, and preferably, in described low temperature sulfur furnace, incineration temperature is 550 DEG C ~ 650 DEG C.
Preferably, mixed inorganic described in S2 is 50 ~ 80 DEG C through the temperature of methanol wash.
Obtain mixed inorganic and organism clear liquid can meet follow-up production requirement to be separated, in S1 with S2, is separated one or more in employing gravity separation, pressure filtration separation, centrifugation.Preferably, the pressure that described pressure filtration is separated is 0.4 ~ 1.0MPa, the aperture of filtration is 1 ~ 5um, temperature is 60 ~ 80 DEG C.
The burning degree of the stability of the scale effect burning process of organism clear liquid and sulphur and organism etc., and the quality of product, preferably, the mass ratio of described organism clear liquid and sulphur is 5 ~ 15:1.
In order to fully reclaim SO
2and it is effectively fixed up, be convenient to follow-up use, preferably, SO in S5
2recovery adopt alkaline solution absorption, obtain sulfite solution; Sulphite is obtained after described sulfite solution drying.
Sulfur-bearing furnace gas is absorbed in order to fully effective, preferably, SO in S5
2recovery adopt adverse current alkaline solution absorption.Further preferably, described adverse current alkaline solution absorption is that 2 ~ 5 stage countercurrents absorb.
Preferably, described sulfite solution drying mode is selected from one or more in spraying dry, fluidized drying, microwave drying, ultra red ray drying.
In order to avoid welding and recovery effective constituent, preferably, the tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
compared with prior art, the present invention has following beneficial effect:
The method that in vat powder production of the present invention, sulfur containing waste material is recycled creatively first have employed preposition except Ficus caricaL, the auxiliary burning of interpolation sulphur and sectional type burning process etc., the initiative method proposing the recycling of a kind of brand-new sulfur containing waste material, sulfur recovery rate is made to reach more than 99%, and obtain the high value added products such as S-WAT, shorten the burning time and effectively extend duration of service of sulfur furnace equipment, from the aspect such as production technique and economic benefit to the huge benefit that enterprise brings.
Embodiment
The present invention is further illustrated below in conjunction with specific embodiment.Unless stated otherwise, the raw material adopted in the embodiment of the present invention, equipment and method are the conventional commercial raw material in this area, the conventional equipment that uses and method.
embodiment 1
The preparation of the sulfur containing waste material of this enforcement: by vat powder produce unnecessary mother liquor through add alkali neutralize and filter obtain S-WAT and in and mother liquor; In and mother liquor obtain methyl alcohol and distillation residual liquid through rectifying.The composition of distillation residual liquid is mainly: sodium formiate about 10%; Other salts 2 ~ 3% such as S-WAT; Organism 2 ~ 3%; Water about 80%.Distillation residual liquid, through condensing crystal, methanol extraction, reclaims sodium formiate wherein.Methanol extraction liquid contains salt and organism.Methanol extraction liquid enters evaporating kettle, evaporates recycling design methyl alcohol in evaporating kettle.After recycling design methyl alcohol, the thick liquid obtained at the bottom of evaporating kettle still is sulfur containing waste material.
The method that in vat powder production, sulfur containing waste material is recycled, comprises the following steps:
S1. the sulfur containing waste material getting 50kg passes in strainer, is separated obtains organism clear liquid and mixed inorganic through pressure filtration;
Pressure filtration: pass into nitrogen in strainer sulfur containing waste material is pressurizeed, under the obstruct of filter screen, organism clear liquid and mixed inorganic separated, mixed inorganic is stayed in still, organism clear liquid is pressed away, until flow out without strand organism clear liquid, namely pressure filtration completes.Wherein, pressure is 0.4MPa, the aperture of filter screen is 5um, and temperature is 60 DEG C.
S2., after passing into 5L methyl alcohol in drying kettle, carry out soaking at 50 DEG C to the mixed inorganic in S1, washing, pressure filtration obtains the first inorganic salt product and filtrate after being separated.First inorganic salt are through the obtained S-WAT byproduct of the process such as super-dry.
S3. pump in low temperature sulfur furnace by the organism clear liquid in S1, with the sulphur mixed burning of liquid state, incineration temperature is 500 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas.Second inorganic salt product falls into bottom low temperature incinerator, for regulating S-WAT or Sodium Hydrosulfite Content after collecting.The mass ratio 5:1 of organism clear liquid and sulphur
S4. SO is contained by S3
2the first furnace gas pass in high temperature sulfur furnace, with the sulphur mixed burning of liquid state, incineration temperature is 700 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt and containing SO
2the second furnace gas; 3rd inorganic salt become molten state to flow in water sealed tank.The mass ratio 5:1 of the first furnace gas and sulphur
S5. SO is contained by S4
2the second furnace gas send in absorption tower after overcooling, purification and carry out 2 stage countercurrent sodium hydroxide solutions and absorb process, obtain sodium sulfite solution, more spray-driedly obtain sulfite product.
The tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 99.8%, and obtains the sulphite product of a large amount of high added value, only occurs a small amount of inorganic salt in low temperature sulfur furnace and high temperature sulfur furnace, slag amount is less, and equipment can remain long-term and run continuously.
embodiment 2
The preparation of the sulfur containing waste material of this enforcement: by vat powder produce unnecessary mother liquor through add alkali neutralize and filter obtain S-WAT and in and mother liquor; In and mother liquor obtain methyl alcohol and distillation residual liquid through rectifying.The composition of distillation residual liquid is mainly: sodium formiate about 10%; Other salts 2 ~ 3% such as S-WAT; Organism 2 ~ 3%; Water about 80%.Distillation residual liquid again after concentrated the thick liquid obtained at the bottom of evaporating kettle still be sulfur containing waste material.
The method that in vat powder production, sulfur containing waste material is recycled, comprises the following steps:
S1. the sulfur containing waste material getting 60kg passes in drying kettle, is separated obtains organism clear liquid and mixed inorganic through pressure filtration;
Pressure filtration: pass into nitrogen in drying kettle sulfur containing waste material is pressurizeed, under the obstruct of filter screen, organism clear liquid and mixed inorganic separated, mixed inorganic is stayed in still, organism clear liquid is pressed away, until flow out without strand organism clear liquid, namely pressure filtration completes.Wherein, pressure is 0.5MPa, the aperture of filter screen is 2um, and temperature is 80 DEG C.
S2., after passing into 6L methyl alcohol in drying kettle, carry out soaking at 60 DEG C to the mixed inorganic in S1, washing, pressure filtration obtains the first inorganic salt product and filtrate after being separated.First inorganic salt product is through the obtained S-WAT byproduct of the process such as super-dry.
S3. pump in low temperature sulfur furnace by the organism clear liquid in S1, with the sulphur mixed burning of liquid state, incineration temperature is 600 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas.Second inorganic salt product falls into bottom low temperature incinerator, for regulating S-WAT or Sodium Hydrosulfite Content after collecting.The mass ratio 10:1 of organism clear liquid and sulphur.
S4. SO is contained by S3
2the first furnace gas pass in high temperature sulfur furnace, with the sulphur mixed burning of liquid state, incineration temperature is 900 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt product and containing SO
2the second furnace gas; 3rd inorganic salt product becomes molten state to flow in water sealed tank.The mass ratio 10:1 of the first furnace gas and sulphur.
S5. SO is contained by S4
2the second furnace gas send in absorption tower after overcooling, purification and carry out 3 stage countercurrent sodium hydroxide solutions and absorb process, obtain sulfite solution, more spray-driedly obtain sulfite product.
The tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 99.7%, and obtains the sulphite product of a large amount of high added value, only occurs a small amount of inorganic salt in low temperature sulfur furnace and high temperature sulfur furnace, slag amount is less, and equipment can remain long-term and run continuously.
embodiment 3
The preparation of the sulfur containing waste material of this enforcement: identical with embodiment 1.
The method that in vat powder production, sulfur containing waste material is recycled, comprises the following steps:
S1. the sulfur containing waste material getting 50kg passes in drying kettle, is separated obtains organism clear liquid and mixed inorganic through pressure filtration;
Pressure filtration: pass into nitrogen in drying kettle sulfur containing waste material is pressurizeed, under the obstruct of filter screen, organism clear liquid and mixed inorganic separated, mixed inorganic is stayed in still, organism clear liquid is pressed away, until flow out without strand organism clear liquid, namely pressure filtration completes.Wherein, pressure is 1.0MPa, the aperture of filter screen is 1um, and temperature is 78 DEG C.
S2., after passing into 5.5L methyl alcohol in drying kettle, carry out soaking at 80 DEG C to the mixed inorganic in S1, washing, pressure filtration obtains the first inorganic salt product and filtrate after being separated.
First inorganic salt are through the obtained S-WAT byproduct of the process such as super-dry.
S3. pump in low temperature sulfur furnace by the organism clear liquid in S1, with the sulphur mixed burning of liquid state, incineration temperature is 650 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas.Second inorganic salt product falls into bottom low temperature incinerator, for regulating S-WAT or Sodium Hydrosulfite Content after collecting.The mass ratio 15:1 of organism clear liquid and sulphur.
S4. SO is contained by S3
2the first furnace gas pass in high temperature sulfur furnace, with the sulphur mixed burning of liquid state, incineration temperature is 1000 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt product and containing SO
2the second furnace gas; 3rd inorganic salt product becomes molten state to flow in water sealed tank.The mass ratio 15:1 of the first furnace gas and sulphur.
S5. SO is contained by S4
2the second furnace gas send in absorption tower after overcooling, purification and carry out 5 stage countercurrent sodium hydroxide solutions and absorb process, obtain sulfite solution, more spray-driedly obtain sulfite product.
The tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 99.8%, and obtains the sulphite product of a large amount of high added value, only occurs a small amount of inorganic salt in low temperature sulfur furnace and high temperature sulfur furnace, slag amount is less, and equipment can remain long-term and run continuously.
Embodiment 4 ~ 7
The processing method of embodiment 4 ~ 7 is similar to embodiment 1, and difference is shown in following table:
| Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | |
| Sulfur containing waste material is originated | With embodiment 2 | With embodiment 1 | With embodiment 2 | With embodiment 1 |
| S1 separate mode | Gravity separation | Centrifugation | Pressure filtration is separated | Centrifugation |
| S3 low temperature sulfur furnace temperature | 550℃ | 580℃ | 600℃ | 620℃ |
| S4 high temperature sulfur furnace temperature | 750℃ | 800℃ | 900℃ | 950℃ |
| The mass ratio of S3 organism clear liquid and sulphur | 6:1 | 7:1 | 9:1 | 12:1 |
| The mass ratio of S4 organism clear liquid and sulphur | 13:1 | 10:1 | 11:1 | 8:1 |
| S5 drying mode | Fluidized drying | Microwave drying | Spraying dry | Ultra red ray drying |
| The rate of recovery of sulphur | 96.8% | 97.2% | 99.3% | 95.9% |
comparative example 1
The preparation of the sulfur containing waste material of this enforcement: identical with embodiment 1.
The method that in vat powder production, sulfur containing waste material is recycled, comprises the following steps:
S1. the sulfur containing waste material getting 50kg passes in low temperature sulfur furnace, and with diesel oil mixed burning, incineration temperature is 500 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas.Second inorganic salt product falls into bottom low temperature incinerator, for regulating S-WAT or Sodium Hydrosulfite Content after collecting.S2. SO is contained by S1
2the first furnace gas pass in high temperature sulfur furnace, with diesel oil mixed burning, incineration temperature is 700 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt product and containing SO
2the second furnace gas; 3rd inorganic salt product becomes molten state to flow in water sealed tank.
S3. SO is contained by S2
2the second furnace gas send in absorption tower after overcooling, purification and carry out 2 stage countercurrent sodium hydroxide solutions and absorb process, obtain sulfite solution, more spray-driedly obtain sulfite product.
The tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 30%, and the product amount sulphite product of high added value is few, there are a large amount of inorganic salt in low temperature sulfur furnace and high temperature sulfur furnace, slag amount is large, and Crystallization Plugging, brings damage to equipment.
comparative example 2
The preparation of the sulfur containing waste material of this enforcement and the method for sulfur containing waste material recycling in vat powder production: similar to embodiment 2, difference is:
S3. pump in low temperature sulfur furnace by the organism clear liquid in S1, with diesel oil mixed burning, incineration temperature is 500 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas.Second inorganic salt product falls into bottom low temperature incinerator, for regulating S-WAT or Sodium Hydrosulfite Content after collecting.The mass ratio 10:1 of organism clear liquid and diesel oil.
S4. SO is contained by S3
2the first furnace gas pass in high temperature sulfur furnace, with diesel oil mixed burning, incineration temperature is 700 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt product and containing SO
2the second furnace gas; 3rd inorganic salt product becomes molten state to flow in water sealed tank.The mass ratio 10:1 of the first furnace gas and diesel oil.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 65%, and in the present embodiment, the content of the final product sulfite salt obtained is only 30%, and effective constituent is very low, and consume the diesel oil of 7kg, cost significantly increases simultaneously.
comparative example 3
The preparation of the sulfur containing waste material of this enforcement and the method for sulfur containing waste material recycling in vat powder production: similar to embodiment 2, difference is:
S3. directly pump in high temperature sulfur furnace by the organism clear liquid in S1, with sulphur mixed burning, incineration temperature is 1000 DEG C, and organism thoroughly decomposes, and obtains the 3rd inorganic salt product and contains SO
2the second furnace gas; 3rd inorganic salt product becomes molten state to flow in water sealed tank.The mass ratio 10:1 of organism clear liquid and sulphur.
Through metering, calculate, in the present embodiment, in sulfur containing waste material, the rate of recovery of sulphur is 72%, and organism clear liquid directly pumps in high temperature sulfur furnace and carries out single hop burning by the present embodiment, makes to occur a large amount of inorganic salt in high temperature sulfur furnace, slag amount is many, and the equipment that affects runs.
Claims (9)
1. the method that in vat powder production, sulfur containing waste material is recycled, is characterized in that, comprise the following steps:
S1. sulfur containing waste material is obtained organism clear liquid and mixed inorganic through separation;
S2. described mixed inorganic is after methanol wash, is separated and obtains the first inorganic salt product;
S3. the organism clear liquid in described S1 passes in low temperature sulfur furnace, and with sulphur mixed burning, incineration temperature is 500 ~ 650 DEG C, obtains the second inorganic salt product and contains SO
2the first furnace gas;
S4. SO is contained in described S3
2the first furnace gas pass in high temperature sulfur furnace, with sulphur mixed burning, incineration temperature is 700 ~ 1000 DEG C, obtains the 3rd inorganic salt product and containing SO
2the second furnace gas;
S5. SO is contained in described S4
2the second furnace gas send in absorption tower and carry out SO after overcooling, purification
2recovery.
2. according to claim 1 vat powder produce in sulfur containing waste material recycle method, it is characterized in that, mixed inorganic described in S2 is 50 ~ 80 DEG C through the temperature of methanol wash.
3. according to claim 1 vat powder produce in the method recycled of sulfur containing waste material, it is characterized in that, in S1 with S2, is separated employing gravity separation, pressure filtration separation, one or more in centrifugation.
4. according to claim 3 vat powder produce in the method recycled of sulfur containing waste material, it is characterized in that, the pressure that described pressure filtration is separated is 0.4 ~ 1.0MPa, the aperture of filtration is 1 ~ 5um, temperature is 60 ~ 80 DEG C.
5. according to claim 1 vat powder produce in sulfur containing waste material recycle method, it is characterized in that, the mass ratio of organism clear liquid and sulphur is 5 ~ 15:1.
6. according to claim 1 vat powder produce in sulfur containing waste material recycle method, it is characterized in that, SO in S5
2recovery adopt alkaline solution absorption, obtain sulfite solution; Sulphite is obtained after described sulfite solution drying.
7. according to claim 6 vat powder produce in sulfur containing waste material recycle method, it is characterized in that, SO in S5
2recovery adopt adverse current alkaline solution absorption.
8. according to claim 6 vat powder produce in sulfur containing waste material recycle method, it is characterized in that, described sulfite solution drying mode is selected from one or more in spraying dry, fluidized drying, microwave drying, ultra red ray drying.
9. reclaim the method for sulphur in sulfur containing waste material according to claim 1 ~ 8 any one, it is characterized in that, the tail gas produced in S1 and S2, enters exhaust treatment system after condensation.
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| CN111847481A (en) * | 2020-08-27 | 2020-10-30 | 银川百泓新材料科技有限公司 | Method and device for recycling sodium chloride and diethylene glycol from permanent violet kneading wastewater |
| CN114234207A (en) * | 2019-03-26 | 2022-03-25 | 山东双桥化工有限公司 | Hazardous waste incineration treatment method for sodium hydrosulfite rectification residues |
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| CN114234207A (en) * | 2019-03-26 | 2022-03-25 | 山东双桥化工有限公司 | Hazardous waste incineration treatment method for sodium hydrosulfite rectification residues |
| CN114234207B (en) * | 2019-03-26 | 2024-09-17 | 南京新世代信息科技有限公司 | Hazardous waste incineration treatment method for rectification residues of sodium hydrosulfite |
| CN111518001A (en) * | 2020-04-28 | 2020-08-11 | 烟台市金河保险粉厂有限公司 | Method for preparing 2-mercaptoethanol from sodium hydrosulfite production waste liquid |
| CN111847481A (en) * | 2020-08-27 | 2020-10-30 | 银川百泓新材料科技有限公司 | Method and device for recycling sodium chloride and diethylene glycol from permanent violet kneading wastewater |
| CN111847481B (en) * | 2020-08-27 | 2023-10-27 | 银川百泓新材料科技有限公司 | Method and device for recycling sodium chloride and diethylene glycol in permanent violet kneading wastewater |
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