CN117739360A - Recycling method of biomass vinyl acetate synthesis byproduct low-boiling waste liquid - Google Patents
Recycling method of biomass vinyl acetate synthesis byproduct low-boiling waste liquid Download PDFInfo
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- CN117739360A CN117739360A CN202311732339.6A CN202311732339A CN117739360A CN 117739360 A CN117739360 A CN 117739360A CN 202311732339 A CN202311732339 A CN 202311732339A CN 117739360 A CN117739360 A CN 117739360A
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- waste liquid
- low
- heating furnace
- boiling waste
- pipeline
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- 238000009835 boiling Methods 0.000 title claims abstract description 111
- 239000007788 liquid Substances 0.000 title claims abstract description 110
- 239000002699 waste material Substances 0.000 title claims abstract description 108
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 16
- 238000003786 synthesis reaction Methods 0.000 title claims abstract description 16
- 239000002028 Biomass Substances 0.000 title claims abstract description 15
- 239000006227 byproduct Substances 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 79
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000005977 Ethylene Substances 0.000 claims abstract description 34
- 239000000295 fuel oil Substances 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 238000000889 atomisation Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 238000010992 reflux Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims 1
- 239000000126 substance Substances 0.000 claims 1
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- HGINCPLSRVDWNT-UHFFFAOYSA-N Acrolein Chemical compound C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 4
- 239000002283 diesel fuel Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- IKHGUXGNUITLKF-UHFFFAOYSA-N Acetaldehyde Chemical compound CC=O IKHGUXGNUITLKF-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000002194 synthesizing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Abstract
The invention discloses a recycling method of biomass vinyl acetate synthesis by-product low-boiling waste liquid, belonging to the technical field of vinyl acetate synthesis, comprising the following steps: the invention provides a low-boiling waste liquid heating furnace fuel oil inlet pipeline which is communicated with a heating furnace fuel oil inlet pipeline of an ethylene section heating furnace, and the low-boiling waste liquid in a low-boiling waste liquid tank is conveyed to the heating furnace fuel oil inlet pipeline to be converged with fuel oil at stable pressure and flow rate, and mixed fuel is obtained after full mixing, and is used as the ethylene section heating furnace fuel. The recycling method is based on the combustibility of the low-boiling waste liquid and has higher combustion value, can replace part of fuel oil as heating fuel of an ethylene section heating furnace, reduces energy consumption, simultaneously reduces transportation and treatment cost for specially treating the low-boiling waste liquid which is required to be transported to an external manufacturer for delegation, saves cost, and finally, is simple and easy to implement.
Description
Technical Field
The invention belongs to the technical field of vinyl acetate synthesis, and particularly relates to a recycling method of biomass vinyl acetate synthesis by-product low-boiling waste liquid.
Background
In addition to the main product vinyl acetate produced in the biomass ethylene process for synthesizing vinyl acetate (boiling point 72.5 ℃), small amounts of by-products are produced, the main components of which are acetaldehyde (boiling point 20.2 ℃), acrolein (boiling point 52 ℃), methyl acetate (boiling point 57.8 ℃), ethyl acetate (boiling point 77.15 ℃), water (boiling point 100 ℃), and the like. In order to obtain a high-purity vinyl acetate product, byproducts formed by side reactions are separated and removed through a rectification system, and liquid left after the vinyl acetate is separated through the rectification system is generally called low-boiling waste liquid. In the prior art, the low-boiling waste liquid is usually sent to a low-boiling waste liquid tank for collection and then is sent to an external manufacturer for special treatment, the treatment cost is approximately 1000 yuan/ton, the treatment mode leads to higher transportation and treatment cost, and meanwhile, most of the low-boiling waste liquid components are still vinyl acetate due to the fact that the boiling point of ethyl acetate is similar to that of vinyl acetate, and the low-boiling waste liquid components are sent to the external manufacturer for special treatment, so that larger resource waste is caused.
In the process of synthesizing vinyl acetate by a biomass ethylene method, the raw material ethylene synthesis comprises an ethylene section heating furnace, wherein the ethylene section heating furnace is a heating device for a reaction for preparing ethylene by dehydrating biomass ethanol, the fuel adopted by the ethylene section heating furnace is diesel, and the main components in the low-boiling waste liquid are organic solvents, so that the invention aims to provide a recycling method of the low-boiling waste liquid of a biomass vinyl acetate synthesis byproduct, and the resource utilization efficiency is improved.
Disclosure of Invention
Because the components of the low-boiling waste liquid produced by the vinyl acetate production device every day are methyl acetate, ethyl acetate, acetaldehyde, acrolein, water and other unavoidable impurities, the invention aims to send the low-boiling waste liquid to a heating furnace of an ethylene section as fuel, the consumption of diesel oil can be reduced every day, the difficult problem that the low-boiling waste liquid needs to be entrusted with special treatment outside is solved, and considerable economic benefit is obtained.
The aim of the invention can be achieved by the following technical scheme:
the recycling method of the biomass vinyl acetate synthesis byproduct low-boiling waste liquid comprises the steps that the low-boiling waste liquid is stored in a low-boiling waste liquid tank, one side of the bottom of the low-boiling waste liquid tank is communicated with an external drainage port through a pipeline, a low-boiling waste liquid pump is arranged on one side, close to the low-boiling waste liquid tank, of a pipeline between the low-boiling waste liquid tank and the external drainage port, a return pipeline is arranged on the pipeline between the low-boiling waste liquid pump and an external drainage valve, one end of the return pipeline is communicated with the pipeline between the low-boiling waste liquid pump and the external drainage valve, and the other end of the return pipeline is communicated with the other side of the bottom of the low-boiling waste liquid tank; the recycling method comprises the following steps: the side of the reflux pipeline is provided with a low-boiling waste liquid heating furnace pipeline, one end of the low-boiling waste liquid heating furnace pipeline is communicated with the reflux pipeline, the other end of the low-boiling waste liquid heating furnace pipeline is communicated with an ethylene section heating furnace, the ethylene section heating furnace is provided with a heating furnace fuel oil inlet pipeline, the other end of the low-boiling waste liquid heating furnace pipeline is communicated with a heating furnace fuel oil inlet pipeline of the ethylene section heating furnace, the low-boiling waste liquid heating furnace pipeline is provided with a low-boiling waste liquid sending-out regulating valve, the low-boiling waste liquid in the low-boiling waste liquid tank is conveyed to the heating furnace fuel oil inlet pipeline to be combined with fuel oil through regulating the low-boiling waste liquid sending-out regulating valve under stable pressure and flow, mixed fuel is obtained after full mixing, and the mixed fuel enters the ethylene section heating furnace to replace part of fuel oil as the ethylene section heating furnace fuel, so that the recycling of the low-boiling waste liquid is completed.
Further, a heating furnace atomization steam inlet pipeline is arranged on the heating furnace of the ethylene section, heating furnace atomization steam flows through the heating furnace atomization steam inlet pipeline, and the mixed fuel is atomized through the heating furnace atomization steam.
The invention has the beneficial effects that:
the recycling method is based on the combustibility of the low-boiling waste liquid and has higher combustion value, can replace part of fuel oil as heating fuel of an ethylene section heating furnace, reduces energy consumption, simultaneously reduces transportation and treatment cost for specially treating the low-boiling waste liquid which is required to be transported to an external manufacturer for delegation, saves cost, and finally, is simple and easy to implement.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic process flow diagram of a method for recycling low-boiling waste liquid as a byproduct of biomass vinyl acetate synthesis.
In the figure: 1. a low boiling point waste liquid tank; 2. a low boiling point waste liquid pump; 3. low-boiling waste liquid is sent to a pipeline of a heating furnace; 4. the low-boiling waste liquid is sent out of the regulating valve; 5. a heating furnace fuel oil inlet line; 6. an atomization steam inlet pipeline of the heating furnace; 7. an ethylene section heating furnace; 8. an outer discharge valve; 9. an outer row interface.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A recycling method of biomass vinyl acetate synthesis by-product low-boiling waste liquid comprises the following steps:
first, referring to fig. 1, the recycling method of the biomass vinyl acetate synthesis byproduct low-boiling waste liquid in this embodiment is based on the following recycling device, and the recycling device has the structure: firstly, low-boiling waste liquid of a biomass vinyl acetate synthesis byproduct in the existing device is stored in a low-boiling waste liquid tank 1, an outer discharge port 9 is communicated with one side of the bottom of the low-boiling waste liquid tank 1 through a pipeline, a low-boiling waste liquid pump 2 is arranged on one side, close to the low-boiling waste liquid tank 1, of the pipeline between the low-boiling waste liquid tank 1 and the outer discharge port 9, an outer discharge valve 8 is arranged on one side, close to the outer discharge port 9, of the pipeline between the low-boiling waste liquid tank 1 and the outer discharge port 9, wherein the low-boiling waste liquid pump 2 is provided with two groups in parallel, the input ends of the two groups of low-boiling waste liquid pumps 2 are communicated with the bottom of the low-boiling waste liquid tank 1 through pipelines, and the output ends of the two groups of the low-boiling waste liquid pumps 2 are communicated with the outer discharge port 9 through pipelines. A return pipeline is arranged on a pipeline between the low-boiling-point waste liquid pump 2 and the external discharge valve 8, one end of the return pipeline is communicated with a pipeline between the low-boiling-point waste liquid pump 2 and the external discharge valve 8, and the other end of the return pipeline is communicated with the other side of the bottom of the low-boiling-point waste liquid tank 1.
The device structure is the existing low-boiling waste liquid storage and delivery structure in the factory, the low-boiling waste liquid delivery heating furnace pipeline 3 is additionally arranged on the basis of the structure, one end of the low-boiling waste liquid delivery heating furnace pipeline 3 is communicated with a backflow pipeline, the other end of the low-boiling waste liquid delivery heating furnace pipeline 3 is communicated with an ethylene section heating furnace 7, a heating furnace fuel oil inlet pipeline 5 and a heating furnace atomization steam inlet pipeline 6 are arranged on the ethylene section heating furnace 7, the heating furnace fuel oil inlet pipeline 5 is used for conveying fuel diesel oil at ordinary times, the heating furnace atomization steam inlet pipeline 6 is used for conveying atomization steam, and further, the other end of the low-boiling waste liquid delivery heating furnace pipeline 3 is communicated with the heating furnace fuel oil inlet pipeline 5 of the ethylene section heating furnace 7, and meanwhile, the low-boiling waste liquid delivery regulating valve 4 is arranged on the low-boiling waste liquid delivery heating furnace pipeline 3.
Working principle:
after the low-boiling waste liquid is collected to a certain liquid level in the low-boiling waste liquid tank 1, a low-boiling waste liquid pump 2 is started, material circulation is carried out through a backflow pipeline, so that all components in the low-boiling waste liquid are uniformly mixed, the combustion effect is prevented from being influenced by layering of all components, the low-boiling waste liquid on a low-boiling waste liquid heating furnace pipeline 3 is opened after the circulation is uniform, the low-boiling waste liquid is sent out of a regulating valve 4, the low-boiling waste liquid is sent to a heating furnace fuel oil inlet pipeline 5 through the regulation of the low-boiling waste liquid sending out of the regulating valve 4, the low-boiling waste liquid and the fuel oil are mixed and then enter an ethylene section heating furnace 7 to be used as heating fuel, in a heater of the ethylene section heating furnace 7, the mixed heating fuel is sprayed out through an oil gun nozzle, the opening degree of a heating furnace atomization steam inlet pipeline 6 is regulated, the fuel is kept in a good spraying state, the low-boiling waste liquid and the fuel oil are fully combusted under the high-temperature condition of 480 ℃ in the ethylene section heating furnace 7, and the heating effect of the ethylene section heating furnace 7 is ensured.
The actual production effect is as follows:
in the factory, the amount of low-boiling waste liquid generated by a biomass vinyl method vinyl acetate synthesis device per day is 1 ton, after the low-boiling waste liquid tank 1 is collected to the liquid level of 50%, the low-boiling waste liquid is sent out to an ethylene section heating furnace 7 through a low-boiling waste liquid pump 2 at the flow rate of 120L/h and the pressure of 0.2MPa, and partial fuel oil is replaced to be used as the fuel of the ethylene section heating furnace 7, so that the fuel oil can be saved by 0.7 ton per day.
And (3) actual production verification:
the low-boiling waste liquid is recycled for 330 tons in a year according to the annual operation time of the vinyl acetate device for 330 days, the fuel oil can be saved by 330 multiplied by 0.7=231 tons, and the fuel oil cost can be saved by 231 multiplied by 4000= 924000 yuan according to the current market price 4000 yuan/ton of diesel oil; meanwhile, the cost of low-boiling waste liquid for external treatment is saved by 330 multiplied by 1000=330000 yuan.
It should be noted that in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (2)
1. The utility model provides a recycling method of low boiling waste liquid of living beings vinyl acetate synthesis accessory substance, low boiling waste liquid is stored in low boiling waste liquid jar (1), there is outer interface (9) in bottom one side of low boiling waste liquid jar (1) through pipeline intercommunication, low boiling waste liquid pump (2) have been seted up to the one side that is close to low boiling waste liquid jar (1) on the pipeline between low boiling waste liquid jar (1) and outer interface (9), the return line has been seted up on the pipeline between low boiling waste liquid pump (2) and outer valve (8), the pipeline intercommunication between return line's one end and low boiling waste liquid pump (2) and outer valve (8), the other end and the opposite side intercommunication of low boiling waste liquid jar (1) bottom, its characterized in that, recycling method includes the following steps: the side of the reflux pipeline is provided with a low-boiling waste liquid heating furnace pipeline (3), one end of the low-boiling waste liquid heating furnace pipeline (3) is communicated with the reflux pipeline, the other end of the low-boiling waste liquid heating furnace pipeline (3) is communicated with an ethylene section heating furnace (7), the ethylene section heating furnace (7) is provided with a heating furnace fuel oil inlet pipeline (5), the other end of the low-boiling waste liquid heating furnace pipeline (3) is communicated with a heating furnace fuel oil inlet pipeline (5) of the ethylene section heating furnace (7), the low-boiling waste liquid heating furnace pipeline (3) is provided with a low-boiling waste liquid sending-out regulating valve (4), the low-boiling waste liquid in the low-boiling waste liquid tank (1) is conveyed to the heating furnace fuel oil inlet pipeline (5) to be combined with fuel oil through regulating and controlling the low-boiling waste liquid sending-out regulating valve (4), mixed fuel is obtained after full mixing, and the mixed fuel enters the ethylene section heating furnace (7) to replace part of fuel oil to be used as the ethylene section heating furnace (7) fuel, and the low-boiling waste liquid is completely utilized.
2. The recycling method of the biomass vinyl acetate synthesis byproduct low-boiling waste liquid according to claim 1, wherein a heating furnace atomization steam inlet pipeline (6) is arranged on the heating furnace (7) of the ethylene section, heating furnace atomization steam flows through the heating furnace atomization steam inlet pipeline (6), and the mixed fuel is atomized by the heating furnace atomization steam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311732339.6A CN117739360A (en) | 2023-12-16 | 2023-12-16 | Recycling method of biomass vinyl acetate synthesis byproduct low-boiling waste liquid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311732339.6A CN117739360A (en) | 2023-12-16 | 2023-12-16 | Recycling method of biomass vinyl acetate synthesis byproduct low-boiling waste liquid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117739360A true CN117739360A (en) | 2024-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311732339.6A Pending CN117739360A (en) | 2023-12-16 | 2023-12-16 | Recycling method of biomass vinyl acetate synthesis byproduct low-boiling waste liquid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117739360A (en) |
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2023
- 2023-12-16 CN CN202311732339.6A patent/CN117739360A/en active Pending
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