CN105174346A - Mother liquor deamination process and equipment for soda production through thermal method - Google Patents
Mother liquor deamination process and equipment for soda production through thermal method Download PDFInfo
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- CN105174346A CN105174346A CN201510599474.7A CN201510599474A CN105174346A CN 105174346 A CN105174346 A CN 105174346A CN 201510599474 A CN201510599474 A CN 201510599474A CN 105174346 A CN105174346 A CN 105174346A
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Abstract
The invention discloses a mother liquor deamination process and equipment for soda production through a thermal method. The equipment comprises a furnace gas condenser, a mother liquor deamination tower and a tail gas rectifying tower. According to the mother liquor deamination process and equipment for the soda production through the thermal method, preheating is conducted on deamination mother liquor by means of high-temperature furnace gas of a calcining section, the self cooling purpose of the furnace gas is achieved simultaneously, energy is utilized reasonably, cooling water consumption of the furnace gas is greatly reduced, deamination tail gas exhausted through the mother liquor deamination tower enters the tail gas rectifying tower to conduct NH3 and CO2 concentration, when one ton of sodium carbonate deamination liquor equivalent is produced, 400 kg of water can be reduced, equivalent evaporation of the evaporation process is reduced, and the ammonia content of a thin solution at the tower bottom is lower than 5 ppm. According to the mother liquor deamination process and equipment for the soda production through the thermal method, by means of energy consumption structure analysis and optimal design of processes, energy consumption in the technical process is optimized, and the comprehensive energy consumption is reduced by 20 percent.
Description
Technical field
The invention belongs to technical field of chemical, particularly a kind of mother liquor deamination Processes and apparatus produced for Re Falian alkali.
Background technology
Mother liquor deamination and calcining are the two large important workshop sections that Re Falian alkali is produced.Typical Re Falian alkali deamination technical process is at present: the high temperature deamination tail gas utilizing out deammoniation tower and the filtration mother liquor entering deammoniation tower carry out heat exchange, mother liquor after preheating enters mother liquor deammoniation tower top, the liquid steam counter-flow produced with reboiler that flows from top to bottom contacts, to remove free ammonia in mother liquor and CO
2, the deamination gas after pre-hot mother liquor is delivered to ammonia absorption tower and is prepared ammoniated brine after overhead condenser condensation, and phlegma all enters deammoniation tower as phegma.
And calcine the high-temperature furnace gas of about 115 DEG C of workshop section through dedusting, enter furnace gas condensing tower, furnace gas is cooled, and recovery ammonia workshop section delivered to by phlegma, and after cooling, furnace gas send compression to utilize after washing.In existing plant produced and in typical process design, high-temperature furnace gas cooling adopts water coolant indirectly to cool usually, and the heat producing soda ash per ton about 300,000 kilocalories need shift out, and this process will consume a large amount of water coolants.600,000 tons of connection alkali devices are produced per year, the cooling water inflow of furnace gas condensation consumption per hour about 2250 tons to join alkali industry access scale.
Summary of the invention
The object of the invention is to: for above-mentioned Problems existing, there is provided a kind of in conjunction with mother liquor deamination and the heat supply and demand feature of calcining Liang great workshop section, optimization energy utilizes, and significantly reduces the equivalent evaporation of deamination liquid and the mother liquor deamination Processes and apparatus produced for Re Falian alkali of furnace gas cooling water amount.
Technical scheme of the present invention is achieved in that a kind of mother liquor deamination technique of producing for Re Falian alkali, it is characterized in that: comprise following technical process: first, the high-temperature calcination furnace gas of 110 ~ 115 DEG C from calcination process and the filtration mother liquor from alkali producing process are carried out heat exchange in furnace gas condenser, filtration mother liquor temperature after preheating reaches 85 ~ 90 DEG C, and furnace gas is cooled simultaneously; Then, the filtration mother liquor after preheating is delivered to mother liquor deammoniation tower, the deamination tail gas of generation directly enters tail gas rectifying tower and carries out rectifying; Finally, the cooled tai gas of rectifying of tail gas condenser through tail gas rectifying tower top deliver to ammonia absorption tower absorb, and tail gas rectifier bottoms ammonia content lower than 5ppm clean ammoniacal liquor through cooling after for other users.
Mother liquor deamination technique of producing for Re Falian alkali of the present invention, it directly enters tail gas rectifying tower feed plate through the deamination tail gas that mother liquor deammoniation tower is deviate from, the rectifying tower reboiler of tail gas rectifying tower peripheral hardware adopts low-pressure steam to provide thermal source, the phlegma backflow of the tail gas condenser at tail gas rectifying tower top enters tail gas rectifying tower, the rectifying of deamination tail gas operates under the vacuum pressures, and vacuum ranges is at 10 ~ 40Kpa.
Mother liquor deamination technique of producing for Re Falian alkali of the present invention, deamination liquid bottom mother liquor deammoniation tower described in it reclaims after low-pressure steam through phlegma flash evaporation, evaporative crystallization operation is pumped to by deamination mother liquor, the shwoot vapour that phlegma flash evaporation top generates delivers to corresponding pipe network, and the steam condensate generated bottom phlegma flash evaporation delivers to corresponding pipe network.
Mother liquor deamination technique of producing for Re Falian alkali of the present invention, the clean ammoniacal liquor of tail gas rectifier bottoms described in it reclaims after low-pressure steam through phlegma flash evaporation, delivers to each production user by clean ammoniacal liquor pump after clean ammoniacal liquor water cooler cooling.
A kind of mother liquor deamination equipment produced for Re Falian alkali, it is characterized in that: comprise furnace gas condenser, mother liquor deammoniation tower and tail gas rectifying tower, described furnace gas condenser top is provided with high-temperature furnace gas inlet mouth, be provided with on described furnace gas condenser top and filter mother liquor fluid inlet, the rear furnace gas air outlet of cooling is provided with in described furnace gas condenser bottom, furnace gas condensate liquid outlet is provided with bottom described furnace gas condenser, described furnace gas condenser top is connected with mother liquor deammoniation tower and tail gas rectifying tower respectively by pipeline, described mother liquor deammoniation tower top is connected with tail gas rectifying tower by pipeline, deamination liquid leakage fluid dram is provided with bottom described mother liquor deammoniation tower, described tail gas rectifying tower top is provided with tail gas condenser, described tail gas condenser is connected with ammonia absorption tower by pipeline, described tail gas rectifier bottoms uses pipeline to be connected with clean ammoniacal liquor water cooler with user by clean ammoniacal liquor pump, described mother liquor deammoniation tower and tail gas rectifying tower are outer is respectively provided with deammoniation tower reboiler and rectifying tower reboiler.
The mother liquor deamination equipment produced for Re Falian alkali of the present invention, furnace gas condensate liquid outlet bottom furnace gas condenser described in it is connected with light liquid distillation tower by light liquid pump, deamination liquid leakage fluid dram bottom described mother liquor deammoniation tower is connected with evaporative crystallization processing apparatus by deamination mother liquor pump, described deammoniation tower reboiler is connected with phlegma flash evaporation respectively by pipeline with rectifying tower reboiler, described phlegma flash evaporation top is provided with shwoot vapour discharge outlet, is provided with steam condensate discharge outlet bottom described phlegma flash evaporation.
The present invention utilizes the high-temperature furnace gas preheating deamination mother liquor of calcining workshop section, reach the object of furnace gas self cooling simultaneously, energy obtains Appropriate application, greatly reduce furnace gas cooling water amount, and enter tail gas rectifying tower through the deamination tail gas that mother liquor deammoniation tower is deviate from and carry out NH3 and CO2 concentrate, produce soda ash deamination liquid equivalent per ton and can reduce 400kg moisture, decrease the equivalent evaporation of evaporization process, light liquid at the bottom of tower contains ammonia lower than 5ppm.The present invention is analyzed by energy consumption structure, and process optimization designs, and optimizes the energy consumption of technological process, and comprehensive energy consumption reduces by 20%.
Accompanying drawing explanation
Fig. 1 is structure principle chart of the present invention.
Mark in figure: 1 is furnace gas condenser, and 2 is mother liquor deammoniation tower, and 3 is tail gas rectifying tower, and 4 is tail gas condenser, 5 is clean ammoniacal liquor pump, and 6 is clean ammoniacal liquor water cooler, and 7 is deammoniation tower reboiler, and 8 is rectifying tower reboiler, 9 is light liquid pump, and 10 is deamination mother liquor pump, and 11 is phlegma flash evaporation.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail.
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, a kind of mother liquor deamination equipment produced for Re Falian alkali, comprise furnace gas condenser 1, mother liquor deammoniation tower 2 and tail gas rectifying tower 3, described furnace gas condenser 1 top is provided with high-temperature furnace gas inlet mouth, be provided with on described furnace gas condenser 1 top and filter mother liquor fluid inlet, the rear furnace gas air outlet of cooling is provided with in described furnace gas condenser 1 bottom, furnace gas condensate liquid outlet is provided with bottom described furnace gas condenser 1, described furnace gas condenser 1 top is connected with mother liquor deammoniation tower 2 and tail gas rectifying tower 3 respectively by pipeline, described mother liquor deammoniation tower 2 top is connected with tail gas rectifying tower 3 by pipeline, deamination liquid leakage fluid dram is provided with bottom described mother liquor deammoniation tower 2, described tail gas rectifying tower 3 top is provided with tail gas condenser 4, described tail gas condenser 4 is connected with ammonia absorption tower by pipeline, pipeline is used to be connected with clean ammoniacal liquor water cooler 6 with user by clean ammoniacal liquor pump 5 bottom described tail gas rectifying tower 3, described mother liquor deammoniation tower 2 and tail gas rectifying tower 3 are outer is respectively provided with deammoniation tower reboiler 7 and rectifying tower reboiler 8.
Wherein, furnace gas condensate liquid outlet bottom described furnace gas condenser 1 is connected with light liquid distillation tower by light liquid pump 9, deamination liquid leakage fluid dram bottom described mother liquor deammoniation tower 2 is connected with evaporative crystallization processing apparatus by deamination mother liquor pump 10, described deammoniation tower reboiler 7 is connected with phlegma flash evaporation 11 respectively by pipeline with rectifying tower reboiler 8, described phlegma flash evaporation 11 top is provided with shwoot vapour discharge outlet, is provided with steam condensate discharge outlet bottom described phlegma flash evaporation 11.
A kind of mother liquor deamination technique of producing for Re Falian alkali, comprise following technical process: first, the high-temperature calcination furnace gas of 110 ~ 115 DEG C from calcination process and the filtration mother liquor from alkali producing process are carried out heat exchange in furnace gas condenser, filtration mother liquor temperature after preheating reaches 85 ~ 90 DEG C, furnace gas is cooled simultaneously, the furnace gas of cooling delivers to calcining process furnace gas washing tower, and the furnace gas condensate that furnace gas condenser produces delivers to light liquid distillation tower by light liquid pump, then, filtration mother liquor after preheating is delivered to mother liquor deammoniation tower, the deamination tail gas deviate from through mother liquor deammoniation tower directly enters tail gas rectifying tower feed plate, and because deamination tail gas needs to be used for carrying out preheating to filtration mother liquor in existing technique, after its preheating, temperature reduces, then cannot carry out tail gas rectifying again, to such an extent as to the equivalent evaporation of deamination liquid is high in its subsequent technique, the rectifying tower reboiler of tail gas rectifying tower peripheral hardware adopts low-pressure steam to provide thermal source, its low pressure steam refers to that below 1Mpa is for low pressure, the phlegma backflow of the tail gas condenser at tail gas rectifying tower top enters tail gas rectifying tower, the rectifying of deamination tail gas operates under the vacuum pressures, vacuum ranges is at 10 ~ 40Kpa, finally, the cooled tai gas of rectifying of tail gas condenser through tail gas rectifying tower top deliver to ammonia absorption tower absorb, and tail gas rectifier bottoms ammonia content lower than 5ppm clean ammoniacal liquor through cooling after for other users.
Wherein, deamination liquid bottom described mother liquor deammoniation tower reclaims after low-pressure steam through phlegma flash evaporation, be pumped to evaporative crystallization operation by deamination mother liquor, the shwoot vapour that phlegma flash evaporation top generates delivers to corresponding pipe network, and the steam condensate generated bottom phlegma flash evaporation delivers to corresponding pipe network; The clean ammoniacal liquor of described tail gas rectifier bottoms reclaims after low-pressure steam through phlegma flash evaporation, delivers to each production user by clean ammoniacal liquor pump after clean ammoniacal liquor water cooler cooling.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a mother liquor deamination technique of producing for Re Falian alkali, it is characterized in that: comprise following technical process: first, the high-temperature calcination furnace gas of 110 ~ 115 DEG C from calcination process and the filtration mother liquor from alkali producing process are carried out heat exchange in furnace gas condenser, filtration mother liquor temperature after preheating reaches 85 ~ 90 DEG C, and furnace gas is cooled simultaneously; Then, the filtration mother liquor after preheating is delivered to mother liquor deammoniation tower, the deamination tail gas of generation directly enters tail gas rectifying tower and carries out rectifying; Finally, the cooled tai gas of rectifying of tail gas condenser through tail gas rectifying tower top deliver to ammonia absorption tower absorb, and tail gas rectifier bottoms ammonia content lower than 5ppm clean ammoniacal liquor through cooling after for other users.
2. mother liquor deamination technique of producing for Re Falian alkali according to claim 1, it is characterized in that: the deamination tail gas deviate from through mother liquor deammoniation tower directly enters tail gas rectifying tower feed plate, the rectifying tower reboiler of tail gas rectifying tower peripheral hardware adopts low-pressure steam to provide thermal source, the phlegma backflow of the tail gas condenser at tail gas rectifying tower top enters tail gas rectifying tower, the rectifying of deamination tail gas operates under the vacuum pressures, and vacuum ranges is at 10 ~ 40Kpa.
3. mother liquor deamination technique of producing for Re Falian alkali according to claim 2, it is characterized in that: the deamination liquid bottom described mother liquor deammoniation tower reclaims after low-pressure steam through phlegma flash evaporation, evaporative crystallization operation is pumped to by deamination mother liquor, the shwoot vapour that phlegma flash evaporation top generates delivers to corresponding pipe network, and the steam condensate generated bottom phlegma flash evaporation delivers to corresponding pipe network.
4. mother liquor deamination technique of producing for Re Falian alkali according to claim 2, it is characterized in that: the clean ammoniacal liquor of described tail gas rectifier bottoms reclaims after low-pressure steam through phlegma flash evaporation, after clean ammoniacal liquor water cooler cooling, deliver to each production user by clean ammoniacal liquor pump.
5. the mother liquor deamination equipment produced for Re Falian alkali, it is characterized in that: comprise furnace gas condenser (1), mother liquor deammoniation tower (2) and tail gas rectifying tower (3), described furnace gas condenser (1) top is provided with high-temperature furnace gas inlet mouth, be provided with on described furnace gas condenser (1) top and filter mother liquor fluid inlet, the rear furnace gas air outlet of cooling is provided with in described furnace gas condenser (1) bottom, described furnace gas condenser (1) bottom is provided with furnace gas condensate liquid outlet, described furnace gas condenser (1) top is connected with mother liquor deammoniation tower (2) and tail gas rectifying tower (3) respectively by pipeline, described mother liquor deammoniation tower (2) top is connected with tail gas rectifying tower (3) by pipeline, described mother liquor deammoniation tower (2) bottom is provided with deamination liquid leakage fluid dram, described tail gas rectifying tower (3) top is provided with tail gas condenser (4), described tail gas condenser (4) is connected with ammonia absorption tower by pipeline, described tail gas rectifying tower (3) bottom uses pipeline to be connected with clean ammoniacal liquor water cooler (6) with user by clean ammoniacal liquor pump (5), described mother liquor deammoniation tower (2) and tail gas rectifying tower (3) are outer is respectively provided with deammoniation tower reboiler (7) and rectifying tower reboiler (8).
6. the mother liquor deamination equipment produced for Re Falian alkali according to claim 5, it is characterized in that: the furnace gas condensate liquid outlet of described furnace gas condenser (1) bottom is connected with light liquid distillation tower by light liquid pump (9), the deamination liquid leakage fluid dram of described mother liquor deammoniation tower (2) bottom is connected with evaporative crystallization processing apparatus by deamination mother liquor pump (10), described deammoniation tower reboiler (7) is connected with phlegma flash evaporation (11) respectively by pipeline with rectifying tower reboiler (8), described phlegma flash evaporation (11) top is provided with shwoot vapour discharge outlet, described phlegma flash evaporation (11) bottom is provided with steam condensate discharge outlet.
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| CN201510599474.7A CN105174346B (en) | 2015-09-21 | 2015-09-21 | A kind of mother liquor deamination Processes and apparatus produced for Re Falian alkali |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864214A (en) * | 1981-10-08 | 1983-04-16 | Nippon Kokan Kk <Nkk> | Recovering method for ammonia |
| CN101264948A (en) * | 2008-04-25 | 2008-09-17 | 北京化工大学 | Ammonia nitrogen waste water discharge-reducing and ammonia nitrogen resource utilizing device and method |
| CN103408086A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof |
-
2015
- 2015-09-21 CN CN201510599474.7A patent/CN105174346B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864214A (en) * | 1981-10-08 | 1983-04-16 | Nippon Kokan Kk <Nkk> | Recovering method for ammonia |
| CN101264948A (en) * | 2008-04-25 | 2008-09-17 | 北京化工大学 | Ammonia nitrogen waste water discharge-reducing and ammonia nitrogen resource utilizing device and method |
| CN103408086A (en) * | 2013-08-02 | 2013-11-27 | 天华化工机械及自动化研究设计院有限公司 | MVR (Mechanical Vapor Recompression) vapor-stripping deamination system and application method thereof |
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