CN102583444A - Alkali-manufacturing device and alkali-manufacturing method for manufacturing alkali in three-section falling film coal burning method - Google Patents
Alkali-manufacturing device and alkali-manufacturing method for manufacturing alkali in three-section falling film coal burning method Download PDFInfo
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- CN102583444A CN102583444A CN2012100256771A CN201210025677A CN102583444A CN 102583444 A CN102583444 A CN 102583444A CN 2012100256771 A CN2012100256771 A CN 2012100256771A CN 201210025677 A CN201210025677 A CN 201210025677A CN 102583444 A CN102583444 A CN 102583444A
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Abstract
The invention discloses an alkali-manufacturing device and an alkali-manufacturing method for manufacturing alkali in a three-section falling film coal burning method. The alkali-manufacturing device comprises a one-effect falling film evaporator, a first lye pump, a two-effect falling film evaporator, a second lye pump, a final concentrator, a coal-burning molten salt furnace device and a soda flake machine, wherein the final concentrator is provided with a falling film pipe and a finished product separator, and the coal-burning molten salt furnace device is provided with a coal-burning molten salt furnace and a waste heat boiler. A heat source inlet of the waste heat boiler is communicated with a waste heat outlet of the coal-burning molten salt furnace, a steam outlet of the waste heat boiler is communicated with a steam inlet of the two-effect falling film evaporator, a first steam inlet of the one-effect falling film evaporator is communicated with a steam outlet of the finished product separator, and a second steam inlet which the one-effect falling film evaporator is further provided with is communicated with a second steam outlet which the two-effect falling film evaporator is provided with. The method utilizes steam generated by the waste heat boiler and the steam discharged by the finished product separator and the two-effect falling film evaporator to perform evaporation concentration. The alkali-manufacturing device and the alkali-manufacturing method have the advantages that the alkali-manufacturing device fully utilizes waste heat discharged by the coal-burning molten salt furnace device to generate steam, a steam generating system is omitted, and the investment is saved; and the alkali-manufacturing method is low in energy consumption and production cost.
Description
Technical field
The present invention relates to the chlor-alkali preparing technical field, particularly a kind of system alkali device and method that is used for the coal-fired legal system alkali of three sections falling liquid films.
Background technology
Being used in the prior art concentration is that to become one of process method that solid alkali adopted of 99% be three sections falling liquid film coal burning methods for 50% raw material alkaline solution evaporation concentration; Three sections falling liquid film coal burning methods are to adopt fire coal as heating fuel, in conjunction with the system alkali method of three sections falling film evaporation technologies.Its system alkali device comprises that constituting one of evaporation concentration system imitates falling-film evaporator, two effect falling-film evaporators, final thickener, flake alkali processing machine and comprise the coal-fired molten salt furnace device of coal-fired molten salt furnace and the living steam system of 0.6 ~ 0.8MPa.Its preparation method is to utilize the living steam of giving birth to the steam system generation to heat concentrated to alkali lye in an effect falling-film evaporator and the two effect falling-film evaporators; Alkali lye after an effect falling-film evaporator concentrates is imitated falling-film evaporators with alkali pump input two; Alkali lye after two effect falling-film evaporators concentrate is imported final thickener with alkali pump; Final thickener is realized final concentrating with melting salt as heat-transfer medium; Melting salt is heated salts solution, dewater by coal-fired molten salt furnace and forms molten state, and melting salt is at final thickener and coal-fired molten salt furnace device internal recycle.What obviously be prone to see is when building system alkali device, not only need build a cover evaporation concentration system; Give birth to steam system but also need to build a cover; Meanwhile, the waste heat that the coal-fired molten salt furnace device of evaporation concentration system prepares molten caustic soda is underutilized, and causes the wasting of resources.Adopt aforementioned system alkali device and system alkali method that 50% raw material alkaline solution evaporation concentration is become 99% solid alkali; Adjust through actual count; System alkali is produced the 1000Kg solid alkali, needs to consume the living steam 310Kg of 0.6 ~ 0.8MPa, bituminous coal (the consumption 310Kg of Q >=4700Kcal/kg).For this reason, need to improve.
Summary of the invention
First purpose of the present invention is exactly the deficiency to prior art; A kind of system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films is provided; This device makes full use of the waste heat production steam that coal-fired molten salt furnace device is discharged, and has saved living steam system, has saved investment; Reduce energy consumption, reduced production cost.
For realizing above-mentioned purpose, the present invention adopts following technical scheme.
A kind of system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films; Comprise one imitate falling-film evaporator, two imitate falling-film evaporators, be provided with falling liquid film pipe and finished product separator final thickener, be provided with coal-fired molten salt furnace device, the flake alkali processing machine of coal-fired molten salt furnace; One effect falling-film evaporator, two is imitated between the falling-film evaporators and is provided with first lye pump; Be provided with second lye pump between two effect falling-film evaporators and the falling liquid film pipe; Said coal-fired molten salt furnace device also comprises waste heat boiler, and the thermal source import of waste heat boiler is communicated with the outlet of the waste heat of coal-fired molten salt furnace; The vapour outlet of waste heat boiler and said two is imitated the steam inlet connection of falling-film evaporator, and the rising pipe that the cooling water inlet of waste heat boiler is imitated falling-film evaporators through condensate pump and condensation water pot and two is communicated with; Said one imitates the vapour outlet connection of first steam inlet and the finished product separator of falling-film evaporator; Said one imitates falling-film evaporator also is provided with second steam inlet, and two effect falling-film evaporators are provided with the secondary steam outlet, and second steam inlet connection of falling-film evaporator is imitated in secondary steam outlet and said.
When adopting system alkali device system alkali of the present invention, the steam of waste heat boiler be used for two imitate falling-film evaporators evaporation concentration; The steam that one effect falling-film evaporator utilizes the finished product separator to provide is sent out and is concentrated; One imitates falling-film evaporator also utilizes the secondary steam of two effect falling-film evaporator surplus to carry out evaporation concentration; Living steam system need be set, not only save investment, saved the energy consumption of production of steam, reduce factory floor space; And can not cause shutdown, maintenance, maintenance etc. because of the equipment failure of giving birth to steam system, improve production efficiency, reduced production cost.
Optimized technical scheme; A said effect falling-film evaporator and two is imitated between the falling-film evaporators and also is provided with the alkali lye preheater; The alkali lye preheater is connected on the alkali lye transport pipe between an effect falling-film evaporator and the two effect falling-film evaporators; The hot water inlet of alkali lye preheater is connected two and imitates on the rising pipe of falling-film evaporators, and the water outlet of alkali lye preheater is connected on the water-in of condensation water pot, the alkali lye preheater utilize two imitate hot water that falling-film evaporators discharge to two imitate falling-film evaporators alkali lye preheat; Further utilize system's waste heat, reduced energy consumption.
Second purpose of the present invention just provides a kind of system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films, uses this method, can save energy consumption, enhances productivity, reduce production costs.
The system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films of the said system alkali of a kind of the present invention's of utilization first goal of the invention device may further comprise the steps:
A, make waste heat boiler produce steam with said coal-fired molten salt furnace device;
B, imitate falling-film evaporator with 50% raw material alkaline electrolyte evaporation concentration to 61% with said one; One imitates falling-film evaporator utilizes the steam of the secondary steam outlet discharge of said two effect falling-film evaporators to carry out evaporation concentration;
C, 61% alkali lye is delivered to said two imitates falling-film evaporators, two imitate falling-film evaporators utilizes steam that said waste heat boiler produces that the evaporation concentration of 61% alkali is become 66% high density liquid caustic soda;
D, the high density liquid caustic soda with 66% are pressed and delivered to said final thickener top; Get in said a plurality of falling liquid film pipes through distributing; Liquid film carries out heat exchange with high-temperature molten salt in the decline process; Dehydration back concentration reaches 99% molten caustic soda in the finished product separator, and the steam that the finished product separator is discharged takes back one and imitates falling-film evaporator and be used for evaporation concentration by an effect falling-film evaporator;
E, 99% molten caustic soda is processed solid piece alkali with said flake alkali processing machine;
Optimized technical scheme, present method also are included in utilizes said alkali lye preheater to carrying out the step of preheating before falling-film evaporator is imitated in 61% alkali lye input two.
Optimized technical scheme; Present method also comprises to two imitates the step of adding sucrose solution in the falling-film evaporator; Reduce the hypochlorite that contains trace in the electrolytic solution of raw material alkali will begin to decompose the falling liquid film pipe that the oxygen that generates status nascendi processes the pure nickel material in the time of 250 ℃ corrosive nature, prolong the work-ing life of making the alkali device.
Adopt the present invention of aforementioned schemes to make the alkali method, the steam that utilizes the alkali liquor concentration evaporation to be produced carries out evaporation concentration with the steam of waste heat boiler production, does not need to deliver a child steam outward; Thereby saved energy consumption, reduced production cost, simultaneously; Owing to need not build living steam system; Thereby saved investment, and can not cause shutdown, maintenance, maintenance etc., thereby improved production efficiency because of the equipment failure of giving birth to steam system.
The present invention's beneficial effect compared with prior art is that system alkali device makes full use of the waste heat production steam that coal-fired molten salt furnace device is discharged, and has saved living steam system, has saved investment; System alkali method energy consumption is low, production cost is low.
Description of drawings
Fig. 1 is the structural representation that the present invention makes the alkali device, and simultaneously, this figure also is used for explanation system alkali method.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described, but does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1Referring to Fig. 1; A kind of system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films; Comprise one imitate falling-film evaporator 1, two imitate falling-film evaporators 2, be provided with falling liquid film pipe 31 and finished product separator 32 final thickener 3, be provided with coal-fired molten salt furnace 41 coal-fired molten salt furnace device 4,, flake alkali processing machine 7, wrapping machine 71; One effect falling-film evaporator 1, two is imitated between the falling-film evaporators 2 and is provided with first lye pump 61; Be provided with second lye pump 24 between two effect falling-film evaporators 2 and the falling liquid film pipe 31, it is characterized in that: coal-fired molten salt furnace device 4 also comprises waste heat boiler 42, and the thermal source import of waste heat boiler 42 is communicated with the outlet of the waste heat of coal-fired molten salt furnace 41; The vapour outlet 42a of waste heat boiler 42 and said two is imitated steam inlet 21 connections of falling-film evaporator 2, and the rising pipe 23 that the cooling water inlet of waste heat boiler 42 is imitated falling-film evaporators 2 through condensate pump 8 and condensation water pot 9 and two is communicated with; Said coal-fired molten salt furnace device 4 also comprises the fused salt groove 43 of splendid attire fused salt; In the fused salt pipe of coal-fired molten salt furnace 41, carry the pump for liquid salts 44 of fused salt; Whole fused salts of controlling in the fused salt pipe that makes coal-fired molten salt furnace 41 through valve pass through falling liquid film pipes 31 back melt back salt baths 43; Perhaps make a part of fused salt through the falling liquid film pipe 31 coal molten salt furnace 41 that strile-backs, the direct melt back salt bath 43 of another part fused salt; Said one imitates the vapour outlet connection of first steam inlet 11 with the finished product separator 32 of falling-film evaporator 1; A said effect falling-film evaporator 1 also is provided with second steam inlet, 12, two effect falling-film evaporators 2 and is provided with secondary steam outlet 22, second steam inlet, 12 connections of a secondary steam outlet 22 and a said effect falling-film evaporator 1.
Said one imitates falling-film evaporator 1 also is provided with the first block steam and drain water jar 10b, and the first block steam and drain water jar 10b is used for discharging the condensed water of steam in the effect falling-film evaporator 1.
A said effect falling-film evaporator 1 and two is imitated between the falling-film evaporators 2 and also is provided with alkali lye preheater 5; Alkali lye preheater 5 is connected on the alkali lye transport pipe 6 between an effect falling-film evaporator 1 and the two effect falling-film evaporators 2; Said first lye pump 61 is connected on the alkali lye transport pipe 6; The alkali lye entrance end of alkali lye preheater 5 is connected with the exit end of first lye pump 61; The hot water inlet of alkali lye preheater 5 is connected two through the second block steam and drain water jar 10c and imitates on the rising pipe 23 of falling-film evaporator 2, and the water outlet of alkali lye preheater 5 is connected on the water-in of condensation water pot 9; Said condensate pump 8 is connected on the water outlet of condensation water pot 9, and the water-in of the water outlet of condensate pump 8 and waste heat boiler 42 is connected; Said alkali lye preheater 5 utilize two imitate hot water that falling-film evaporators 2 discharge to two imitate falling-film evaporators 2 alkali lye preheat; Said two imitate falling-film evaporator 2 also is connected with sucrose solution jar 2b through sucrose volume pump 2a, and sucrose solution jar 2b is provided with solid sucrose and adds inlet and water-in, and water-in is communicated with the water outlet of said condensate pump 8; With through in alkali lye, adding the corrosive nature that the hypochlorite that contains trace in the electrolytic solution that sucrose reduces raw material alkali will begin to decompose the falling liquid film pipe 31 that the oxygen that generates status nascendi processes the pure nickel material 250 ℃ the time, to prolong the work-ing life of making the alkali device.
Said coal-fired molten salt furnace 41 also comprises air-blast system, fume exhaust system; Air-blast system comprises air preheater 41a, gas blower 41b; Air preheater 41a is connected on the blast inlet of coal-fired molten salt furnace 41; Air preheater 41a also is connected with the air outlet of waste heat boiler 42, with the waste heat that utilizes waste heat boiler 42 to discharge preheating is carried out in the air inlet of coal-fired molten salt furnace 41, further reduces energy consumption.The chimney 41f that said fume exhaust system comprises the smoke discharging pipe 41c that is connected on the waste heat boiler 42 and the desulfurization dust-removal system 41d that is connected successively at smoke discharging pipe 41c, induced draft fan 41e and is used for high altitude discharge forms, and avoids the polluted air environment, satisfies emission request.
The molten caustic soda exit end of said finished product separator 32 also is connected with the flash tank 33 of further evaporation concentration; The exit end of flash tank 33 is connected with redistributor 34; Redistributor 34 can be distributed to the flake alkali processing machine 7 that can molten caustic soda be processed sheet alkali more than two with molten caustic soda; The water outlet of flake alkali processing machine 7 is connected with and reclaims pond 7a, reclaims pond 7a and is provided with recovery water pump 7b, reclaims water pump 7b water outlet and takes back shared engineering so that utilize again; The solid alkali outlet below of said flake alkali processing machine 7 is provided with wrapping machine 35, to form vendible commodity.
Said one imitates falling-film evaporator 1 also is connected with surface condenser 10; Surface condenser 10 is connected with two vacuum pump 10a; Vacuum pump 10a makes one to imitate in the evaporator room of falling-film evaporator 1 and two effect falling-film evaporators 2 and have subnormal ambient through surface condenser 10; The water coolant of surface condenser 10 is taken to the tap water of general facilities, and the shared engineering of the high-temperature water outlet of surface condenser 10 is so that utilize again; One effect falling-film evaporator 1 inserts and discharges after surface condenser 10 interior steam are condensed.
Embodiment 2Referring to Fig. 1, a kind of system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films of utilizing the embodiment of the invention 1 said system alkali device may further comprise the steps:
A, make waste heat boiler 42 produce steam with said coal-fired molten salt furnace device 4;
B, imitating falling-film evaporator 1 with said one will be from 50% raw material alkaline electrolyte evaporation concentration to 61% of outside; One imitates falling-film evaporator 1 utilizes the steam of secondary steam outlet 22 discharges of said two effect falling-film evaporators 2 to carry out evaporation concentration;
C, with said first lye pump 61 61% alkali lye is delivered to said two and imitates falling-film evaporators 2, two and imitate falling-film evaporators 2 and utilize steam that said waste heat boiler 42 produces that the evaporation concentration of 61% alkali is become 66% high density liquid caustic soda;
D, 66% high density liquid caustic soda is pressed and delivered to said final thickener 3 tops with said second lye pump 24; Get in said a plurality of falling liquid film pipes 31 through distributing; Liquid film carries out heat exchange with high-temperature molten salt in the decline process; Dehydration back concentration reaches 99% molten caustic soda in finished product separator 32, and the steam that finished product separator 32 is discharged takes back one and imitates falling-film evaporator 1 and be used for evaporation concentration by an effect falling-film evaporator 1;
E, 99% molten caustic soda is processed solid piece alkali with said flake alkali processing machine 7;
F, with said wrapping machine 35 solid piece alkali is packaged into salable commodity and waits to sell.
Present method also is included in utilizes said alkali lye preheater to carrying out the step of preheating before falling-film evaporator 2 is imitated in 61% alkali lye input two.
Present method also comprises through sucrose volume pump 2a imitates the step of adding sucrose solution in the falling-film evaporator 2 to two.
Adopt aforementioned system alkali device and system alkali method that 50% raw material alkaline solution evaporation concentration is become 99% solid alkali, adjust through actual count, produce the 1000Kg solid alkali, do not need the outer steam that supplies to give birth to, bituminous coal (the consumption 280Kg of Q >=4700Kcal/kg), is saved 30Kg.
Though more than combined accompanying drawing to describe embodiment of the present invention; But those of ordinary skill in the art also can recognize in the scope to accompanying claims and make various variations or modification, and these modifications and variation are interpreted as within scope of the present invention and intention.
Claims (6)
1. system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films; Comprise that one imitates falling-film evaporator (1), two effect falling-film evaporators (2), the final thickener (3) that is provided with falling liquid film pipe (31) and finished product separator (32), the coal-fired molten salt furnace device (4) that is provided with coal-fired molten salt furnace (41), flake alkali processing machine (7); One effect falling-film evaporator (1), two is imitated between the falling-film evaporators (2) and is provided with first lye pump (61); Be provided with second lye pump (24) between two effect falling-film evaporators (2) and the falling liquid film pipe (31); It is characterized in that: the coal-fired molten salt furnace device of institute (4) also comprises waste heat boiler (42); The thermal source import of waste heat boiler (42) is communicated with the waste heat outlet of coal-fired molten salt furnace (41), and the vapour outlet (42a) of waste heat boiler (42) and said two is imitated steam inlet (21) connection of falling-film evaporator (2); Said one imitates falling-film evaporator (1) also is provided with second steam inlet (12), and two effect falling-film evaporators (2) are provided with secondary steam outlet (22), and second steam inlet (12) connection of falling-film evaporator (1) is imitated in secondary steam outlet (22) and said.
2. the system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films according to claim 1 is characterized in that: said one imitates the vapour outlet connection of first steam inlet (11) with the finished product separator (32) of falling-film evaporator (1).
3. the system alkali device that is used for the coal-fired legal system alkali of three sections falling liquid films according to claim 1 and 2 is characterized in that: the rising pipe (23) that the cooling water inlet of said waste heat boiler (42) is imitated falling-film evaporator (2) through condensate pump (8) and condensation water pot (9) and two is communicated with; A said effect falling-film evaporator (1) and two is imitated between the falling-film evaporators (2) and also is provided with alkali lye preheater (5); Alkali lye preheater (5) is connected on the alkali lye transport pipe (6) between an effect falling-film evaporator (1) and the two effect falling-film evaporators (2); The hot water inlet of alkali lye preheater (5) is connected two and imitates on the rising pipe (23) of falling-film evaporator (2), and the water outlet of alkali lye preheater (5) is connected on the water-in of condensation water pot (9).
4. a system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films of utilizing the said system alkali of each claim device in the claim 1～3 is characterized in that, may further comprise the steps:
A, make waste heat boiler (42) produce steam with said coal-fired molten salt furnace device (4);
B, imitate falling-film evaporator (1) with 50% raw material alkaline electrolyte evaporation concentration to 61% with said one; One imitates falling-film evaporator (1) utilizes the steam of secondary steam outlet (22) discharge of said two effect falling-film evaporators (2) to carry out evaporation concentration;
C, with said first lye pump (61) 61% alkali lye is delivered to said two and imitates falling-film evaporators (2), two imitate falling-film evaporators (2) utilizes steam that said waste heat boiler (42) produces that the evaporation concentration of 61% alkali is become 66% high density liquid caustic soda;
D, 66% high density liquid caustic soda is pressed and delivered to said final thickener (3) top with said second lye pump (24); Get in said a plurality of falling liquid film pipes (31) through distributing; Liquid film carries out heat exchange with high-temperature molten salt in the decline process; Dehydration back concentration reaches 99% molten caustic soda in finished product separator (32), and the steam that finished product separator (32) is discharged takes back in the said effect falling-film evaporator (1) and imitates falling-film evaporator (1) by one and is used for evaporation concentration;
F, 99% molten caustic soda is processed solid piece alkali with said flake alkali processing machine.
5. the system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films according to claim 4 is characterized in that, this method also is included in 61% alkali lye input two and imitates that falling-film evaporator (2) is preceding to utilize said alkali lye preheater to carrying out the step of preheating.
6. the system alkali method that is used for the coal-fired legal system alkali of three sections falling liquid films according to claim 4 is characterized in that, this method also comprises to two imitates the step of adding sucrose solution in the falling-film evaporator (2).
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Cited By (7)
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| CN108314060A (en) * | 2018-02-11 | 2018-07-24 | 中盐安徽红四方股份有限公司 | Liquid caustic soda and piece alkali process units simultaneously |
| CN108314059A (en) * | 2018-03-08 | 2018-07-24 | 苏州天沃环境能源工程有限公司 | Dense effect in solid caustic soda production equipment concentrates mechanism |
| CN109264745A (en) * | 2018-12-07 | 2019-01-25 | 青海盐湖工业股份有限公司 | A kind of hydroxide flake potassium production method |
| CN114291825A (en) * | 2021-12-27 | 2022-04-08 | 重庆博张智能装备有限公司 | Process production line and process method for preparing caustic soda |
| CN114349025A (en) * | 2021-12-27 | 2022-04-15 | 重庆博张智能装备有限公司 | Flake caustic soda preparation system and method |
| CN114377418A (en) * | 2021-12-27 | 2022-04-22 | 重庆博张智能装备有限公司 | Flake caustic soda preparation device and method |
| CN114426296A (en) * | 2022-02-23 | 2022-05-03 | 重庆博张智能装备有限公司 | Process production line and process method for preparing caustic soda |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108314060A (en) * | 2018-02-11 | 2018-07-24 | 中盐安徽红四方股份有限公司 | Liquid caustic soda and piece alkali process units simultaneously |
| CN108314059A (en) * | 2018-03-08 | 2018-07-24 | 苏州天沃环境能源工程有限公司 | Dense effect in solid caustic soda production equipment concentrates mechanism |
| CN109264745A (en) * | 2018-12-07 | 2019-01-25 | 青海盐湖工业股份有限公司 | A kind of hydroxide flake potassium production method |
| CN114291825A (en) * | 2021-12-27 | 2022-04-08 | 重庆博张智能装备有限公司 | Process production line and process method for preparing caustic soda |
| CN114349025A (en) * | 2021-12-27 | 2022-04-15 | 重庆博张智能装备有限公司 | Flake caustic soda preparation system and method |
| CN114377418A (en) * | 2021-12-27 | 2022-04-22 | 重庆博张智能装备有限公司 | Flake caustic soda preparation device and method |
| CN114426296A (en) * | 2022-02-23 | 2022-05-03 | 重庆博张智能装备有限公司 | Process production line and process method for preparing caustic soda |
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Application publication date: 20120718 |