CN115415290B - Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product of treatment process - Google Patents
Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product of treatment process Download PDFInfo
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- CN115415290B CN115415290B CN202210791061.9A CN202210791061A CN115415290B CN 115415290 B CN115415290 B CN 115415290B CN 202210791061 A CN202210791061 A CN 202210791061A CN 115415290 B CN115415290 B CN 115415290B
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- glycol
- waste
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- 239000004576 sand Substances 0.000 title claims abstract description 78
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- 238000001914 filtration Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000000126 substance Substances 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 title claims abstract description 11
- 238000009987 spinning Methods 0.000 title claims abstract description 11
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 111
- 238000006243 chemical reaction Methods 0.000 claims abstract description 48
- 239000003513 alkali Substances 0.000 claims abstract description 36
- VIQSRHWJEKERKR-UHFFFAOYSA-L disodium;terephthalate Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=C(C([O-])=O)C=C1 VIQSRHWJEKERKR-UHFFFAOYSA-L 0.000 claims abstract description 36
- 239000000243 solution Substances 0.000 claims abstract description 28
- 238000004064 recycling Methods 0.000 claims abstract description 23
- 239000011259 mixed solution Substances 0.000 claims abstract description 22
- 239000012535 impurity Substances 0.000 claims abstract description 17
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 11
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000003756 stirring Methods 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 28
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 22
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 20
- 239000011780 sodium chloride Substances 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 12
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 159000000011 group IA salts Chemical class 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 abstract description 3
- HQWKKEIVHQXCPI-UHFFFAOYSA-L disodium;phthalate Chemical compound [Na+].[Na+].[O-]C(=O)C1=CC=CC=C1C([O-])=O HQWKKEIVHQXCPI-UHFFFAOYSA-L 0.000 abstract 1
- 238000003837 high-temperature calcination Methods 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/70—Chemical treatment, e.g. pH adjustment or oxidation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/30—Destroying solid waste or transforming solid waste into something useful or harmless involving mechanical treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Inorganic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a treatment process of a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning component, which comprises the following steps of: preheating sea sand cakes, preparing a special reaction solution and heating; placing the sea sand cake in a filter basket, hoisting the sea sand cake into a reaction kettle containing special solution, stirring, and continuously reacting in constant temperature, constant pressure and constant flow environment to generate a mixed solution of sodium terephthalate, glycol, alkali and sea sand; hanging a filter basket, wherein sea sand, sodium terephthalate solid, alkali, glycol and trace impurities and wet primary mud cakes are arranged in the filter basket; and (5) drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and obtaining the secondary mud cake. The invention does not need high-temperature calcination of the sea sand cake, the low-temperature reaction effectively protects the sea sand, and simultaneously reduces the pollution to the environment, and sodium phthalate and glycol in the extract can be used for preparing PET, industrial snow melting agent and the like, thereby realizing reutilization, saving the cost and reducing the waste.
Description
Technical Field
The invention relates to the technical field of sea sand treatment, in particular to a treatment process of waste sea sand cakes generated by sea sand for filtering a chemical fiber spinning assembly and application of a treatment extract.
Background
In the chemical fiber spinning filtration process, sea sand is needed to be added for pressure equalizing, and the sea sand contains sea sand, a polyester stainless steel filter screen and other impurities, and at present, most of sea sand is burnt, so that on one hand, environmental pollution is caused, on the other hand, waste is caused, and waste cannot be recycled.
Disclosure of Invention
The invention aims to provide a treatment process of a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning component, which aims to solve the problems that the existing environment is polluted due to direct incineration of the waste sea sand and substances in the waste sea sand cannot be extracted and reused.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A treatment process of a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning component comprises the following steps:
Step one: preheating the waste sea sand cake to 140-160 ℃; uniformly stirring glycol, reaction blending alkali and a catalyst to prepare a reaction solution, and heating to 180-210 ℃;
Step two: the sea sand cake is placed in a metal film filter basket, the waste sea sand cake is conveyed into a reaction kettle containing reaction solution through the filter basket, the reaction solution in the reaction kettle is subjected to homogenizing stirring through a homogenizing pump, continuous reaction is carried out in an environment with constant temperature, constant pressure and constant flow, wherein the constant temperature is 180-220 ℃, the constant pressure is 2 kg of pressure, and the mixed solution with sodium terephthalate, alkali, sea sand, glycol and catalyst is generated, and sodium terephthalate, alkali and sea sand can be separated out from the filter basket;
Step three: hanging a filter basket, wherein sea sand and wet primary mud cakes containing sodium terephthalate solid, alkali, glycol and trace impurities are contained in the filter basket, residual liquid of glycol and sodium terephthalate powder is remained in a reaction kettle, and the residual liquid is rapidly cooled by pressurizing the metal film filter basket so as to filter the residual liquid in the reaction kettle to remove the sodium terephthalate powder, and a reaction solution is separated out for recycling;
Step four: drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining a secondary mud cake which is dried and contains sodium terephthalate solid, alkali and trace impurities; and (3) drying the sea sand generated in the step (III) by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining dried mud cakes with sodium terephthalate, alkali and trace impurities.
Preferably, the reaction base is an alkaline salt.
Preferably, the pore diameter of the metal film filter basket is manufactured according to the sea mesh number.
The invention also provides application of the sodium terephthalate and the ethylene glycol obtained by the treatment process of the waste sea sand cake in preparing PET and industrial snow-melting agent.
Preferably, the method for preparing PET and industrial snow-melting agent comprises the following steps:
Step one: reacting the extracted dried mud cake with sodium terephthalate with hydrochloric acid to generate a mixed solution of terephthalic acid, sodium chloride and hydrochloric acid;
step two: filtering the mixed solution by adopting a filter to separate out terephthalic acid powder, and reacting ethylene glycol with terephthalic acid to obtain PET;
step three: and (3) cooling the residual solution of the sodium chloride and the hydrochloric acid obtained in the step two, separating out the sodium chloride, using the sodium chloride as an industrial snow-melting agent, and recycling the residual solution.
Compared with the prior art, the invention has the beneficial effects that:
Sodium terephthalate can be obtained from the sea sand through a series of reactions and filtration, and glycol is separated out from the mixed solution, so that the sea sand cake is not required to be calcined at high temperature, the sea sand is effectively protected through low-temperature reaction, the pollution to the environment is reduced, the effective treatment of the sea sand is realized, and the pollution to the environment is reduced.
And sodium terephthalate and hydrochloric acid react to produce sodium chloride and terephthalic acid, and terephthalic acid and ethylene glycol react to produce PET, so that sodium chloride can be used for industrial snow melting agents and the like, the recycling of the extract is realized, the cost is saved, and the waste is reduced.
Drawings
FIG. 1 is a flow chart of a process for treating and extracting waste sea sand;
FIG. 2is a flow chart of the process of application of the extract.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1, a process for treating a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning assembly comprises the following steps:
Step one: preheating the waste sea sand to 140 ℃; preparing a reaction solution, uniformly stirring ethylene glycol, a reaction preparation alkali and a catalyst, and heating to 180 ℃, wherein the reaction preparation alkali is alkaline salt;
Step two: delivering the waste sea sand into a reaction kettle, circularly delivering a reaction solution into the reaction kettle at a constant flow rate, stirring, and continuously reacting in an environment with the temperature of 170 ℃ and the pressure of 2 kg to generate a mixed solution with sodium terephthalate, alkali, sea sand, ethylene glycol and a catalyst;
Step three: the temperature of the mixed solution is kept at 180 ℃, and a metal film filter is used for filtering alkali and sea sand in the mixed solution to separate out the sea sand and wet primary mud cake with sodium terephthalate solid, alkali and trace impurities;
Step four: drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining a secondary mud cake which is dried and contains sodium terephthalate solid, alkali and trace impurities; drying the sea sand generated in the third step by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining dried mud cakes with sodium terephthalate, alkali and trace impurities;
step five: cooling the mixed solution generated after the filtering in the step three rapidly, filtering by using a high-precision filtering device, and separating out a reaction solution, a cleaning solution and ethylene glycol liquid for recycling; the sea sand and the mixture in the filtering device are washed by glycol and are conveyed into a metal film filter for recycling.
Example 2
Referring to fig. 1, a process for treating a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning assembly comprises the following steps:
step one: preheating the waste sea sand to 150 ℃; preparing a reaction solution, uniformly stirring ethylene glycol, a reaction preparation alkali and a catalyst, and heating to 195 ℃, wherein the reaction preparation alkali is alkaline salt;
Step two: delivering the waste sea sand into a reaction kettle, circularly delivering a reaction solution into the reaction kettle at a constant flow rate, stirring, and continuously reacting in an environment with the temperature of 200 ℃ and the pressure of 2 kg to generate a mixed solution with sodium terephthalate, alkali, sea sand, ethylene glycol and a catalyst;
Step three: the temperature of the mixed solution is kept at 200 ℃, and a metal film filter is used for filtering alkali and sea sand in the mixed solution to separate out the sea sand and wet primary mud cake which contains sodium terephthalate solid, alkali and trace impurities;
Step four: drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining a secondary mud cake which is dried and contains sodium terephthalate solid, alkali and trace impurities; drying the sea sand generated in the third step by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining dried mud cakes with sodium terephthalate, alkali and trace impurities;
step five: cooling the mixed solution generated after the filtering in the step three rapidly, filtering by using a high-precision filtering device, and separating out a reaction solution, a cleaning solution and ethylene glycol liquid for recycling; the sea sand and the mixture in the filtering device are washed by glycol and are conveyed into a metal film filter for recycling.
Example 3
Referring to fig. 1, a process for treating a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning assembly comprises the following steps:
step one: preheating the waste sea sand to 160 ℃; preparing a reaction solution, uniformly stirring ethylene glycol, a reaction preparation alkali and a catalyst, and heating to 210 ℃, wherein the reaction preparation alkali is alkaline salt;
Step two: delivering the waste sea sand into a reaction kettle, circularly delivering a reaction solution into the reaction kettle at a constant flow rate, stirring, and continuously reacting in an environment with the temperature of 220 ℃ and the pressure of 2 kg to generate a mixed solution with sodium terephthalate, alkali, sea sand, ethylene glycol and a catalyst;
Step three: the temperature of the mixed solution is kept at 220 ℃, and a metal film filter is used for filtering alkali and sea sand in the mixed solution to separate out the sea sand and wet primary mud cake which contains sodium terephthalate solid, alkali and trace impurities;
Step four: drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining a secondary mud cake which is dried and contains sodium terephthalate solid, alkali and trace impurities; drying the sea sand generated in the third step by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining dried mud cakes with sodium terephthalate, alkali and trace impurities;
step five: cooling the mixed solution generated after the filtering in the step three rapidly, filtering by using a high-precision filtering device, and separating out a reaction solution, a cleaning solution and ethylene glycol liquid for recycling; the sea sand and the mixture in the filtering device are washed by glycol and are conveyed into a metal film filter for recycling.
The invention also provides application of the extract in the treatment of the waste sea sand.
Preferably, the waste sea sand treatment extract is sodium terephthalate and ethylene glycol, and can be used for preparing PET and industrial snow melting agents, and comprises the following steps of:
Step one: reacting the extracted dried mud cake with sodium terephthalate with hydrochloric acid to generate a mixed solution of terephthalic acid, sodium chloride and hydrochloric acid;
step two: filtering the mixed solution by adopting a filter to separate out terephthalic acid powder, and reacting ethylene glycol with terephthalic acid to obtain PET;
step three: and (3) cooling the residual solution of the sodium chloride and the hydrochloric acid obtained in the step two, separating out the sodium chloride, using the sodium chloride as an industrial snow-melting agent, and recycling the residual solution.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (5)
1. A treatment process of a waste sea sand cake generated by sea sand for filtering a chemical fiber spinning assembly is characterized by comprising the following steps:
Step one: preheating the waste sea sand cake to 140-160 ℃; uniformly stirring glycol, reaction blending alkali and a catalyst to prepare a reaction solution, and heating to 180-210 ℃;
Step two: the sea sand cake is placed in a metal film filter basket, the waste sea sand cake is conveyed into a reaction kettle containing reaction solution through the filter basket, the reaction solution in the reaction kettle is subjected to homogenizing stirring through a homogenizing pump, continuous reaction is carried out in an environment with constant temperature, constant pressure and constant flow, wherein the constant temperature is 180-220 ℃, the constant pressure is 2 kg of pressure, and the mixed solution with sodium terephthalate, alkali, sea sand, glycol and catalyst is generated, and sodium terephthalate, alkali and sea sand can be separated out from the filter basket;
Step three: hanging a filter basket, wherein sea sand and wet primary mud cakes containing sodium terephthalate solid, alkali, glycol and trace impurities are contained in the filter basket, residual liquid of glycol and sodium terephthalate powder is remained in a reaction kettle, and the residual liquid is rapidly cooled by pressurizing the metal film filter basket so as to filter the residual liquid in the reaction kettle to remove the sodium terephthalate powder, and a reaction solution is separated out for recycling;
Step four: drying the primary mud cake by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining a secondary mud cake which is dried and contains sodium terephthalate solid, alkali and trace impurities; and (3) drying the sea sand generated in the step (III) by using a closed oven, condensing and recycling ethylene glycol, and simultaneously obtaining dried mud cakes with sodium terephthalate, alkali and trace impurities.
2. The process for treating a spent sea cake according to claim 1, wherein: the reaction prepares alkali as alkaline salt.
3. The process for treating a spent sea cake according to claim 1, wherein: the aperture of the metal film filter basket is manufactured according to the number of sea grains.
4. Use of mud cakes with sodium terephthalate and ethylene glycol obtained from the process of treatment of waste sea sand cakes according to any of claims 1-3, characterized by the use for the manufacture of PET and industrial snow-melting agents.
5. The use according to claim 4, characterized by the steps of:
Step one: reacting the extracted dried mud cake with sodium terephthalate with hydrochloric acid to generate a mixed solution of terephthalic acid, sodium chloride and hydrochloric acid;
step two: filtering the mixed solution by adopting a filter to separate out terephthalic acid powder, and reacting ethylene glycol with terephthalic acid to obtain PET;
step three: and (3) cooling the residual solution of the sodium chloride and the hydrochloric acid obtained in the step two, separating out the sodium chloride, using the sodium chloride as an industrial snow-melting agent, and recycling the residual solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210791061.9A CN115415290B (en) | 2022-07-05 | 2022-07-05 | Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product of treatment process |
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|---|---|---|---|
| CN202210791061.9A CN115415290B (en) | 2022-07-05 | 2022-07-05 | Treatment process of waste sea sand cake generated by sea sand for filtering chemical fiber spinning assembly and application of product of treatment process |
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| Publication Number | Publication Date |
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| CN115415290A CN115415290A (en) | 2022-12-02 |
| CN115415290B true CN115415290B (en) | 2024-05-03 |
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| CN114181037A (en) * | 2021-12-14 | 2022-03-15 | 石泰山 | Method for producing sodium acetate by PET polyester alkali depolymerization |
-
2022
- 2022-07-05 CN CN202210791061.9A patent/CN115415290B/en active Active
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|---|---|---|---|---|
| TW591049B (en) * | 2001-10-16 | 2004-06-11 | Teijin Ltd | Method for recycling PET bottle |
| CN101531581A (en) * | 2008-03-13 | 2009-09-16 | 徐晶 | Regenerative method of PET wastes |
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| RU2754972C1 (en) * | 2020-09-24 | 2021-09-08 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) | Method for processing polyethylene terephthalate waste |
| CN114181037A (en) * | 2021-12-14 | 2022-03-15 | 石泰山 | Method for producing sodium acetate by PET polyester alkali depolymerization |
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