CN105175223A - Methanol pre-rectifying tower heating system utilizing methanol synthesis reaction gas - Google Patents
Methanol pre-rectifying tower heating system utilizing methanol synthesis reaction gas Download PDFInfo
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- CN105175223A CN105175223A CN201510543764.XA CN201510543764A CN105175223A CN 105175223 A CN105175223 A CN 105175223A CN 201510543764 A CN201510543764 A CN 201510543764A CN 105175223 A CN105175223 A CN 105175223A
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- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
- C07C29/80—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment by distillation
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Abstract
The invention discloses a methanol pre-rectifying tower heating system utilizing methanol synthesis reaction gas. Methanol synthesis reaction gas discharged from a methanol synthesis gas-gas heat exchanger is taken as a heating heat source for a methanol pre-rectifying tower reboiler to provide part of or all of the heating heat source required by rectification of the methanol pre-rectifying tower; the quantity of heat provided by the methanol synthesis reaction gas in the pre-rectifying tower reboiler is controlled by the kettle pressure of the pre-rectifying tower; the lower the kettle pressure of the pre-rectifying tower is, the more the heat the methanol synthesis reaction gas provides in the pre-rectifying tower reboiler, and vice versa. The pressure of the rectifying tower can be controlled by using a pressurizing machine which compresses noncondensable gas at the tower top, and methanol in the noncondensable gas is condensed through cooling and washing, so that methanol in the noncondensable gas is recovered; the condensing and washing liquor is sent to a return tank of the methanol pre-rectifying tower as a return liquid of the methanol pre-rectifying tower, and the noncondensable gas after washing is sent to a fuel or torch pipe network.
Description
Technical field
The present invention relates to the preparing technical field of methyl alcohol, especially a kind of methanol-fueled CLC reaction gas is used for methyl alcohol pre-rectifying tower heating process.
Background technology
At present, after methyl alcohol synthetic reactor exports reaction gas and synthesizes the heat exchange of charging inlet tower gas, adopt water-cooled or air cooling that building-up reactions gas is cooled to normal temperature, the condensations such as the methyl alcohol that synthesis is generated, water are got off, then through gas-liquid separation, the liquid separated is as crude carbinol, and the gas major part circulation separated, small portion of gas is got rid of as discharging gas.
Due to the heat exchange of synthesis charging inlet tower gas after methanol-fueled CLC reaction gas temperature be usually less than 100 DEG C, a large amount of low level heat contained in reaction gas cannot utilize, the condensation such as methyl alcohol, water that water-cooled or air cooling can only be adopted to be generated by methanol-fueled CLC is got off, large calorimetric is released in condensation, needs the electric energy consuming a large amount of water coolants or consume needed for air cooling.
Methyl alcohol pre-rectifying tower adopts the method for rectifying to be deviate from from tower top by the light constituent in crude carbinol, pre-rectifying tower tower reactor adopts steam heating usually, methyl alcohol pre-rectifying tower tower top working pressure is about ~ 0.05Mpa (G), bottom temperature about 75 ~ 86 DEG C.In order to deviate from the light constituent in crude carbinol, methyl alcohol pre-rectifying tower needs a certain amount of quantity of reflux, and namely needing provides certain heat source in tower reactor.
How to make full use of the resource in each link in methyl alcohol preparation process, reduce energy consumption, reduce cost be at present needed for.
Methanol-fueled CLC reaction gas is described as methyl alcohol pre-rectifying tower reboiler heat source, then with methyl alcohol pre-rectifying tower charging heat exchange in Chinese invention CN201510117322.9 specification sheets; Methyl alcohol pre-rectifying tower tower top working pressure is negative pressure, methyl alcohol pre-rectifying tower tower top working pressure is controlled by water ring vacuum pump, the tower top non-condensable gas extracted out from water ring vacuum pump send fuel gas pipe network after overcooling, save methyl alcohol pre-rectifying tower reboiler heat source, reduce cooling methanol-fueled CLC reaction gas water coolant simultaneously, energy-saving and cost-reducing.But also exist when methanol concentration is large or molecular weight is large, the technical problem that reaction can not be carried out or reactivity is low.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of methanol-fueled CLC reaction gas for methyl alcohol pre-rectifying tower heating system, saving pre-rectifying tower reboiler heat source, reduce cooling methanol-fueled CLC reaction gas water coolant simultaneously, energy-saving and cost-reducing.
Solve methanol-fueled CLC reaction gas in the present invention of above technical problem for methyl alcohol pre-rectifying tower heating system, comprise methanol-fueled CLC reaction gas, crude carbinol, synthetic water water cooler, pressurizing tower, non-condensable gas send fuel pipe network or flare system, methyl alcohol pre-rectifying tower T1 and pipeline, it is characterized in that: described system is also provided with methyl alcohol pre-rectifying tower reboiler E1, methyl alcohol pre-rectifying tower enters tower preheater E2, backflash V1, overhead condenser E3, reflux pump P1, water-spraying control absorption unit, is connected between each equipment by pipeline;
In reaction, methanol-fueled CLC reaction gas enters methyl alcohol pre-rectifying tower again and enters tower preheater E2 and cool after methyl alcohol pre-rectifying tower tower reactor reboiler E1 cools, then go synthetic water water cooler to cool further, methyl alcohol pre-rectifying tower tower reactor reboiler E1 is also connected with methyl alcohol pre-rectifying tower tower reactor and carries out heat exchange; Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 and heat, then enters methyl alcohol pre-rectifying tower T1 rectifying, and methyl alcohol pre-rectifying tower T1 tower top out gas enters overhead condenser E3, and methyl alcohol pre-rectifying tower T1 tower reactor liquid out goes pressurizing tower; The isolated phlegma of overhead condenser E3 enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1; The isolated gas of overhead condenser E3 enters water-spraying control absorption unit to carry out cooling and washing, non-condensable gas after cooling, washing send fuel pipe network or flare system, phlegma and washings enter backflash V1, then send into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1, so repeatedly.
Namely methyl alcohol pre-rectifying tower enters tower preheater E2 and is connected with methyl alcohol pre-rectifying tower reboiler E1 with synthetic water water cooler, methyl alcohol pre-rectifying tower T1 respectively, methyl alcohol pre-rectifying tower tower reactor is connected with pressurizing tower with methyl alcohol pre-rectifying tower reboiler E1 respectively, methyl alcohol pre-rectifying tower T1 tower top is connected with reflux pump P1 with overhead condenser E3 respectively, backflash V1 is connected with water scrubber V2 with reflux pump P1, overhead condenser E3, exhaust gas cooler E4 respectively, overhead condenser E3 is connected with water-spraying control absorption unit, is connected between each equipment by pipeline.
In the present invention, no matter whether pre-tower top has supercharger, all establishes cooling washing absorption device, adopt water or the dilute methanol aqueous solution to wash non-condensable gas, reduce methanol loss before pre-tower top non-condensable gas discharge.Equipment is simple, reduces production cost further, Simplified flowsheet, raises the efficiency.
In the present invention, methanol-fueled CLC reaction gas is the methanol-fueled CLC reaction gas after the heat exchange of synthesis charging inlet tower gas.Enter tower preheater with the methanol-fueled CLC reaction gas after the heat exchange of synthesis charging inlet tower gas for methyl alcohol pre-rectifying tower tower reactor and methyl alcohol pre-rectifying tower to heat, save thermal source needed for rectifying, reduce the required water coolant of cooling simultaneously.
Described overhead condenser E3 and water-spraying control absorption unit, between be also provided with supercharging system C1.
If the isolated gaseous tension of overhead condenser E3 can directly enter fuel pipe network or flare system, be then introduced into water-spraying control absorption unit cooling washing; If the isolated gaseous tension of overhead condenser E3 can not directly enter fuel pipe network or flare system, then arrange supercharging system C1 to its supercharging, after supercharging, gas enters water-spraying control absorption unit cooling washing.
Described supercharging system C1 is pendular ring supercharger or dry type supercharger.
Described water-spraying control absorption unit is water-spraying control resorber, and cooling and washing are in a device, and described washing is by fresh water or dilute methanol solution washing.The isolated non-condensable gas of overhead condenser E3, through the cooling of water-spraying control resorber and fresh water or dilute methanol solution washing, can reclaim methyl alcohol contained in non-condensable gas as far as possible, minimizing methanol loss.
Dilute methanol concentration of aqueous solution is≤10(wt%).
Described water-spraying control absorption unit is made up of exhaust gas cooler E4 and water scrubber V2, and the isolated gas of described overhead condenser E3 enters exhaust gas cooler E4, and cooled non-condensable gas enters water scrubber V2 fresh water wash, and phlegma enters backflash V1; Non-condensable gas after washing send fuel pipe network or flare system, and washings enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1.
Described crude carbinol enters methyl alcohol pre-rectifying tower and enters after tower preheater E2 heats to enter rectifying in the middle part of methyl alcohol pre-rectifying tower T1 again.
In the present invention, the heat exchange in methyl alcohol pre-rectifying tower reboiler of methanol-fueled CLC reaction gas can provide the part or all of heat needed for the rectifying of methyl alcohol pre-rectifying tower, methanol-fueled CLC reaction gas can provide heat how much to be controlled by methyl alcohol pre-rectifying tower tower reactor pressure, pre-rectifying tower tower reactor pressure is lower, methanol-fueled CLC reaction gas can provide heat more in pre-rectifying tower reboiler, and vice versa.
In the present invention, methanol-fueled CLC reaction gas is as methyl alcohol pre-rectifying tower reboiler and methyl alcohol pre-rectifying tower charging heat source, saves methyl alcohol pre-rectifying tower reboiler heat source, reduces cooling methanol-fueled CLC reaction gas water coolant, to reach energy-saving and cost-reducing object simultaneously; Non-condensable gas cooled and with fresh water, non-condensable gas is washed, reclaiming methyl alcohol contained in non-condensable gas as far as possible, reaching the object reducing methanol loss.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1 in the present invention
Fig. 2 is the structural representation of embodiment 2 in the present invention
Fig. 3 is the structural representation of embodiment 3 in the present invention
Wherein, number in the figure is specially: 1. methyl alcohol pre-rectifying tower reboiler E12. methyl alcohol pre-rectifying tower enters tower preheater E23. overhead condenser E34. non-condensable gas and send fuel pipe network or flare system 5. exhaust gas cooler E46. synthetic water water cooler 7. methyl alcohol pre-rectifying tower T1(7.1 methyl alcohol pre-rectifying tower T1 tower top, 7.2 methyl alcohol pre-rectifying tower T1 tower reactors, in the middle part of 7.3 methyl alcohol pre-rectifying tower T1) 8. backflash V19. supercharging system C110. water scrubber V211. reflux pump P112. pressurizing tower 13. pipeline 15. water-spraying control absorption unit
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment:
The present invention with methanol-fueled CLC reaction gas as methyl alcohol pre-rectifying tower reboiler heat source, then with methyl alcohol pre-rectifying tower charging heat exchange, methanol-fueled CLC reaction gas can provide the part or all of heat source needed for the rectifying of methyl alcohol pre-rectifying tower, and methanol-fueled CLC reaction gas can provide heat how much to be controlled by methyl alcohol pre-rectifying tower tower reactor pressure in pre-rectifying tower reboiler; Supercharger can be adopted to control Rectification column pressure, tower top non-condensable gas compresses by supercharger, then through overcooling and washing, methanol condensed in non-condensable gas is got off, thus the methyl alcohol in recovery non-condensable gas, condensation and water lotion send methyl alcohol pre-rectifying tower backflash as methyl alcohol pre-rectifying tower phegma, and after washing, non-condensable gas send fuel or torch pipe network.
Below in conjunction with embodiment, the present invention is described in further detail, but this should be interpreted as that the scope of the above-mentioned theme of the present invention is only limitted to following embodiment:
Embodiment 1
Methanol-fueled CLC reaction gas is used for methyl alcohol pre-rectifying tower heating system, be provided with synthetic water water cooler, pressurizing tower, non-condensable gas send fuel pipe network or flare system, methyl alcohol pre-rectifying tower T1, pipeline, methyl alcohol pre-rectifying tower reboiler E1, methyl alcohol pre-rectifying tower enter tower preheater E2, backflash V1, overhead condenser E3, reflux pump P1, supercharging system C1, water-spraying control absorption unit, water-spraying control absorption unit is made up of exhaust gas cooler E4 and water scrubber V2, is connected between each equipment by pipeline;
In reaction, methanol-fueled CLC reaction gas enters methyl alcohol pre-rectifying tower again and enters tower preheater E2 and cool after methyl alcohol pre-rectifying tower tower reactor reboiler E1 cools, then go synthetic water water cooler to cool further, methyl alcohol pre-rectifying tower tower reactor reboiler E1 is also connected with methyl alcohol pre-rectifying tower tower reactor and carries out heat exchange; Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 and heat, then enters methyl alcohol pre-rectifying tower T1 rectifying, and methyl alcohol pre-rectifying tower T1 tower top out gas enters overhead condenser E3, and methyl alcohol pre-rectifying tower T1 tower reactor liquid out goes pressurizing tower; The isolated phlegma of overhead condenser E3 enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1; Enter exhaust gas cooler E4 after the isolated gas of overhead condenser E3 enters supercharging system C1 supercharging, supercharging system C1 is dry type supercharger; Cooled non-condensable gas enters water scrubber V2 fresh water or dilute methanol solution washing, and phlegma enters backflash V1; Non-condensable gas after washing send fuel pipe network or flare system, and washings enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1.
Namely methyl alcohol pre-rectifying tower enter tower preheater E2 respectively with synthetic water water cooler, methyl alcohol pre-rectifying tower T1 is connected with methyl alcohol pre-rectifying tower reboiler E1, methyl alcohol pre-rectifying tower tower reactor is connected with pressurizing tower with methyl alcohol pre-rectifying tower reboiler E1 respectively, methyl alcohol pre-rectifying tower T1 tower top is connected with reflux pump P1 with overhead condenser E3 respectively, backflash V1 respectively with reflux pump P1, overhead condenser E3, exhaust gas cooler E4 is connected with water scrubber V2, overhead condenser E3 is connected with exhaust gas cooler E4, exhaust gas cooler E4 is connected with water scrubber V2, supercharging system C1 is located between overhead condenser E3 and exhaust gas cooler E4, connected by pipeline between each equipment.
The methanol-fueled CLC reaction gas of the present embodiment is used for methyl alcohol pre-rectifying tower tower reactor heating idiographic flow can be as follows:
Enter the methanol-fueled CLC reaction gas temperature 90 DEG C (being that 200,000 tons/year of methyl alcohol produced per year by raw material in coke(oven)gas) of methyl alcohol pre-rectifying tower reboiler, pressure 6.0MPa(A).
As flow process as shown in Figure 1, methanol-fueled CLC reaction gas temperature 90 DEG C, temperature about 75 DEG C after methyl alcohol pre-rectifying tower reboiler E1 heat exchange, then enters tower preheater E2 heat exchange through methyl alcohol pre-rectifying tower, and methanol-fueled CLC reaction gas temperature is down to about 73 DEG C of water coolers that anhydrate.Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 temperature after heating about 65 DEG C, enters methyl alcohol pre-rectifying tower rectifying T1.Methyl alcohol pre-rectifying tower tower top pressure controls at 0.09MPa(A), methyl alcohol pre-rectifying tower tower reactor pressure 0.12MPa(A), bottom temperature about 72 DEG C.Go pressurizing tower from the isolated liquid of methyl alcohol pre-rectifying tower tower reactor, tower top out gas is separated through condenser E3, outlet noncondensable gas temperature 50 C, and phlegma enters backflash V1, then sends into methyl alcohol pre-rectifying tower tower top by reflux pump P1; Non-condensable gas enters supercharging system C1 and is supercharged to 0.13Mpa (A), then enters exhaust gas cooler E4 and is cooled to 40 DEG C, then enters washing bath V2 by fresh water wash.Non-condensable gas after washing send fuel pipe network or torch, and phlegma and water lotion are sent chute V1 back to and entered in methyl alcohol pre-rectifying tower through reflux pump P1 again.
In this embodiment, methyl alcohol pre-rectifying tower reboiler heat source is supplied by building-up reactions air lift, steam saving (by 1.0Mpa saturation steam) ~ 9.5t/h compared with employing steam heating methyl alcohol pre-rectifying tower reboiler flow process, recirculated cooling water (by 8 DEG C of temperature difference) ~ 660t/h is saved compared with employing building-up reactions air water cold flow, because methyl alcohol pre-rectifying tower tower top is negative pressure, rectifying non-condensable gas adopts supercharging system supercharging, consume power consumption 33KW compared with being malleation flow process with methyl alcohol pre-rectifying tower tower top, but non-condensable gas reduces methanol emissions ~ 70kg/h more.
Methyl alcohol pre-rectifying tower bottom temperature changes with water-content in crude carbinol and methyl alcohol pre-rectifying tower tower reactor pressure, and in crude carbinol, water-content is lower, and bottom temperature is lower.Under methyl alcohol pre-rectifying tower tower top pressure 0.05Mpa (G), bottom temperature is usually at 75 ~ 86 DEG C, the methanol-fueled CLC reaction gas temperature going out methanol-fueled CLC gas-gas heat exchanger is generally less than 100 DEG C, higher and to go out the methanol-fueled CLC reaction gas temperature of methanol-fueled CLC gas-gas heat exchanger lower and in the lower situation of pressure for water-content in crude carbinol, if do not reduce methyl alcohol pre-rectifying tower tower reactor pressure, between methanol-fueled CLC reaction gas temperature and methyl alcohol pre-rectifying tower bottom temperature, gap institute liberated heat is limited, can not meet methyl alcohol pre-rectifying tower tower reactor heating institute heat requirement completely.Only have and reduce methyl alcohol pre-rectifying tower tower reactor pressure, strengthen methanol-fueled CLC reaction gas and methyl alcohol pre-rectifying tower bottom temperature gap, methyl methanol syngas releases heat could meet methyl alcohol pre-rectifying tower tower reactor heating institute heat requirement completely, methyl alcohol pre-rectifying tower tower reactor pressure size is determined according to concentration, water-content, methanol-fueled CLC reacting gas pressure and temperature in crude carbinol, crude carbinol concentration is low, water-content is high, methanol-fueled CLC reacting gas pressure is low, methanol-fueled CLC reaction gas temperature is low, then pre-rectifying tower tower reactor pressure is lower, and vice versa.
Embodiment
2
Methanol-fueled CLC reaction gas is used for methyl alcohol pre-rectifying tower heating system, be provided with synthetic water water cooler, pressurizing tower, non-condensable gas send fuel pipe network or flare system, methyl alcohol pre-rectifying tower T1, pipeline, methyl alcohol pre-rectifying tower reboiler E1, methyl alcohol pre-rectifying tower enter tower preheater E2, backflash V1, overhead condenser E3, reflux pump P1, exhaust gas cooler E4 and water scrubber V2, connected by pipeline between each equipment;
In reaction, methanol-fueled CLC reaction gas enters methyl alcohol pre-rectifying tower again and enters tower preheater E2 and cool after methyl alcohol pre-rectifying tower tower reactor reboiler E1 cools, then go synthetic water water cooler to cool further, methyl alcohol pre-rectifying tower tower reactor reboiler E1 is also connected with methyl alcohol pre-rectifying tower tower reactor and carries out heat exchange; Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 and heat, then enters methyl alcohol pre-rectifying tower T1 rectifying, and methyl alcohol pre-rectifying tower T1 tower top out gas enters overhead condenser E3, and methyl alcohol pre-rectifying tower T1 tower reactor liquid out goes pressurizing tower; The isolated phlegma of overhead condenser E3 enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1; The isolated gas of overhead condenser E3 enters exhaust gas cooler E4, and cooled non-condensable gas enters water scrubber V2 fresh water or dilute methanol solution washing, and phlegma enters backflash V1; Non-condensable gas after washing send fuel pipe network or flare system, and washings enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1.
The methanol-fueled CLC reaction gas of the present embodiment is as follows for MeOH methanol pre-rectifying tower heating procedure:
Enter the methanol-fueled CLC reaction gas temperature 95 DEG C (being that 600,000 tons/year of methyl alcohol produced per year by raw material in coal) of methyl alcohol pre-rectifying tower reboiler, pressure 8.0MPa(A).
As flow process as shown in Figure 2, methanol-fueled CLC reaction gas temperature 95 DEG C, temperature about 79 DEG C after methyl alcohol pre-rectifying tower reboiler E1 heat exchange, then enter tower preheater E2 heat exchange through methyl alcohol pre-rectifying tower, methanol-fueled CLC reaction gas temperature is down to 77 DEG C of water coolers that anhydrate.Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 temperature after heating about 65 DEG C, enters methyl alcohol pre-rectifying tower rectifying T1.Methyl alcohol pre-rectifying tower tower top pressure controls at 0.12MPa(A), methyl alcohol pre-rectifying tower tower reactor pressure is about 0.15MPa(A), bottom temperature 74 DEG C.Go pressurizing tower from the isolated liquid of methyl alcohol pre-rectifying tower tower reactor, tower top out gas is separated through condenser E3, outlet noncondensable gas temperature 50 C, and phlegma enters backflash V1, then sends into methyl alcohol pre-rectifying tower tower top by reflux pump P1; Non-condensable gas enters exhaust gas cooler E4 and is cooled to 40 DEG C, then enters washing bath V2 by fresh water or dilute methanol solution washing.Non-condensable gas after washing send fuel pipe network or torch, and phlegma and water lotion are sent chute V1 back to and entered in methyl alcohol pre-rectifying tower through reflux pump P1 again.
In this embodiment, methyl alcohol pre-rectifying tower reboiler heat source is supplied by building-up reactions air lift, steam saving (by 1.0Mpa saturation steam) ~ 28t/h compared with employing steam heating methyl alcohol pre-rectifying tower reboiler flow process, recirculated cooling water (by 8 DEG C of temperature difference) ~ 1750t/h is saved, recovery methyl alcohol ~ 110kg/h compared with not adopting washing process with pre-tower non-condensable gas compared with employing building-up reactions air water cold flow.
Embodiment 3
Other content is as embodiment 1, methanol-fueled CLC reaction gas is used for methyl alcohol pre-rectifying tower heating system, be provided with synthetic water water cooler, pressurizing tower, non-condensable gas send fuel pipe network or flare system, methyl alcohol pre-rectifying tower T1, pipeline, methyl alcohol pre-rectifying tower reboiler E1, methyl alcohol pre-rectifying tower enter tower preheater E2, backflash V1, overhead condenser E3, reflux pump P1, supercharging system C1, exhaust gas cooler E4 and water scrubber V2, connected by pipeline between each equipment;
In reaction, methanol-fueled CLC reaction gas enters methyl alcohol pre-rectifying tower again and enters tower preheater E2 and cool after methyl alcohol pre-rectifying tower tower reactor reboiler E1 cools, then go synthetic water water cooler to cool further, methyl alcohol pre-rectifying tower tower reactor reboiler E1 is also connected with methyl alcohol pre-rectifying tower tower reactor and carries out heat exchange; Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2 and heat, then enters methyl alcohol pre-rectifying tower T1 rectifying, and methyl alcohol pre-rectifying tower T1 tower top out gas enters overhead condenser E3, and methyl alcohol pre-rectifying tower T1 tower reactor liquid out goes pressurizing tower; The isolated phlegma of overhead condenser E3 enters backflash V1, then sends into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1; The isolated gas of overhead condenser E3 enters water-spraying control absorption unit to carry out cooling and washing, non-condensable gas after cooling, washing send fuel pipe network or flare system, phlegma and washings enter backflash V1, then send into methyl alcohol pre-rectifying tower T1 tower top by reflux pump P1, so repeatedly.
Claims (6)
1. methanol-fueled CLC reaction gas is used for methyl alcohol pre-rectifying tower heating system, comprise methanol-fueled CLC reaction gas, crude carbinol, synthetic water water cooler (6), pressurizing tower (12), non-condensable gas send fuel pipe network or flare system (4), methyl alcohol pre-rectifying tower T1 (7) and pipeline (13), it is characterized in that: described system is also provided with methyl alcohol pre-rectifying tower reboiler E1(1), methyl alcohol pre-rectifying tower enters tower preheater E2(2), backflash V1(8), overhead condenser E3(3), reflux pump P1(11) and water-spraying control absorption unit (15), connected by pipeline (13) between each equipment,
In reaction, methanol-fueled CLC reaction gas is through methyl alcohol pre-rectifying tower tower reactor reboiler E1(1) cool after enter methyl alcohol pre-rectifying tower again and enter tower preheater E2(2) cool, then synthetic water water cooler (6) is gone to cool further, methyl alcohol pre-rectifying tower tower reactor reboiler E1(1) be also connected with methyl alcohol pre-rectifying tower tower reactor (7-2) and carry out heat exchange; Crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2(2) heating, enter methyl alcohol pre-rectifying tower T1(7 again) rectifying, methyl alcohol pre-rectifying tower T1 tower top (7-1) out gas enters overhead condenser E3(3), methyl alcohol pre-rectifying tower T1 tower reactor (7-2) liquid out goes pressurizing tower (12); Overhead condenser E3(3) isolated phlegma enters backflash V1(8), then by reflux pump P1(11) send into methyl alcohol pre-rectifying tower T1 tower top (7-1); Overhead condenser E3(3) isolated gas enters water-spraying control absorption unit (15) and carries out cooling and washing, non-condensable gas after cooling, washing send fuel pipe network or flare system (4), phlegma and washings enter backflash V1(8), again by reflux pump P1(11) send into methyl alcohol pre-rectifying tower T1 tower top (7-1), so repeatedly.
2. methanol-fueled CLC reaction gas according to claim 1 be used for methyl alcohol pre-rectifying tower heating system, it is characterized in that: described overhead condenser E3(3) and water-spraying control absorption unit (15) between be also provided with supercharging system C1(9).
3. methanol-fueled CLC reaction gas according to claim 2 is used for methyl alcohol pre-rectifying tower heating system, it is characterized in that: described supercharging system C1(9) be pendular ring supercharger or dry type supercharger.
4. the methanol-fueled CLC reaction gas according to any one of claim 1-3 is used for methyl alcohol pre-rectifying tower heating system, it is characterized in that: described water-spraying control absorption unit (15) is water-spraying control resorber.
5. the methanol-fueled CLC reaction gas according to any one of claim 1-3 is used for methyl alcohol pre-rectifying tower heating system, it is characterized in that: described water-spraying control absorption unit (15) is by exhaust gas cooler E4(5) and water scrubber V2(10) form, described overhead condenser E3(3) isolated gas enters exhaust gas cooler E4(5), cooled non-condensable gas enters water scrubber V2(10) use fresh water wash, phlegma enters backflash V1(8); Non-condensable gas after washing send fuel pipe network or flare system (4), and washings enters backflash V1(8), then by reflux pump P1(11) send into methyl alcohol pre-rectifying tower T1 tower top (7-1).
6. methanol-fueled CLC reaction gas according to claim 1 be used for methyl alcohol pre-rectifying tower heating system, it is characterized in that: described crude carbinol enters methyl alcohol pre-rectifying tower and enters tower preheater E2(2) heating after enter (7-3) rectifying in the middle part of methyl alcohol pre-rectifying tower T1 again.
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| CN103570494A (en) * | 2013-11-21 | 2014-02-12 | 七台河宝泰隆甲醇有限公司 | Method for starting methanol synthesis tower through reverse steam guiding |
| CN104387230A (en) * | 2014-11-21 | 2015-03-04 | 中煤能源黑龙江煤化工有限公司 | Device for processing methanol flash steam and method for processing methanol flash steam employing device |
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