CN109126177A - A kind of device and method extending soda manufacture mother liquid distillation tower duty cycle - Google Patents
A kind of device and method extending soda manufacture mother liquid distillation tower duty cycle Download PDFInfo
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- CN109126177A CN109126177A CN201810853135.0A CN201810853135A CN109126177A CN 109126177 A CN109126177 A CN 109126177A CN 201810853135 A CN201810853135 A CN 201810853135A CN 109126177 A CN109126177 A CN 109126177A
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- preliming
- ammonia still
- preliming tank
- tank
- ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D3/00—Distillation or related exchange processes in which liquids are contacted with gaseous media, e.g. stripping
- B01D3/42—Regulation; Control
- B01D3/4211—Regulation; Control of columns
- B01D3/4216—Head stream
Abstract
The invention discloses a kind of device and methods for extending soda manufacture mother liquid distillation tower duty cycle, described device includes ammonia still and at least two preliming tanks being arranged in series, the bottom of at least one preliming tank is provided with low pressure steam inlet, the ammonia still is divided into preheating section and distilling period, the preheating section of the ammonia still is connect with First preliming tank, and the distilling period of the ammonia still is connect with last preliming tank.The present invention is in mother liquor Distallation systm, by the way that multiple preliming tanks are connected, and the mode of a certain amount of automatic steam control operation temperature is passed through in preliming tank, to slow down scabbing for mother liquid distillation tower, in mother liquor distillation process, for bubble-cap tower or perforated plate column, the purpose for extending mother liquid distillation tower duty cycle can reach using technology of the invention.
Description
Technical field
The invention belongs to ammonia-soda process soda manufacture technology field, in particular to one kind can extend soda manufacture mother liquor
The device and method of destilling tower duty cycle.
Background technique
In ammonia-soda process soda ash, NH3It is constantly to be followed in cycles in process of production as existing for intermediate medium
Ring, and this circulation is realized by distillation process.Mother liquor Distallation systm is made of preliming tank and mother liquid distillation tower, due to
There are a large amount of sulfate and sandstone (coming from milk of lime) in system, destilling tower and preliming tank in use can fouling, one
Fouling is serious in denier tower, and operation is just unable to operate normally, and at this moment must just be reduced or stop tower cleaning.This cleaning that scabs is with artificial
Based on, work situation is severe, and it is very arduous, and have largely scab object and product sand in tower and bucket, ammonia taste is very heavy, before cleaning
It must first carry out boiling tower.Therefore, the scarring speed for slowing down distillation equipment, extends its service life, and reduction is swept tower frequency, is not only
The needs of steady production, and the requirement for reducing labor intensity and improving labor safety, creating friendly working environment.
The destilling tower of alkali factory of the country mainly has bubble column and sieve-plate tower at present, and distillation technique has positive pressure distillation, vacuum distillation
It is distilled with dry ash.Wherein the country is uniquely a set of is had been switched off using the alkali factory of dry ash distillation technique.Under the conditions of same materials,
It is operated using vacuum distillation, the bubble-cap tower operation cycle uses positive pressure distillation technique generally up to 6 months or more, makes
It is only 3 months or so with the period.Since internal structure is simple compared with bubble column, service life will significantly improve perforated plate column,
It generally can reach 5-6 months.
Typical case in analytical distillation tower scabs object, main component CaSO4.According to related document introduction, operation temperature
Lower than 93 DEG C, CaSO4It is precipitated with insoluble shape, but not blocking device；At this point, it is with CaSO4.2H2O form exists.And vacuum
Distillation procedure can maintain low-temperature operation, be its operation cycle it is long the main reason for.But the distillation equipment of vacuum distillation produces
Intensity is low, preheats mother solution C O2Content is high, and ash cream consumption is high.Therefore, the alkali factory of most domestic still uses positive pressure to distill at present
Technique.Bubble-cap tower is since its good operating flexibility is widely used, but the problem that its service life is partially short
It annoyings manufacturing enterprise always, needs to study a kind of effective measures, solve short difficulty bubble column positive pressure distillation technique duty cycle
Topic.
Summary of the invention
It is an object of the invention to: in view of the above problems, soda manufacture mother can effectively be extended by providing one kind
The device and method of liquid destilling tower duty cycle.
The technical scheme of the present invention is realized as follows: a kind of dress for extending soda manufacture mother liquid distillation tower duty cycle
It sets, it is characterised in that: including ammonia still and at least two preliming tanks being arranged in series, set in the bottom of at least one preliming tank
It is equipped with low pressure steam inlet, the ammonia still is divided into preheating section and distilling period, the preheating section and the pre- ash of First of the ammonia still
Bucket connection, the distilling period of the ammonia still are connect with last preliming tank.
The device of the present invention for extending soda manufacture mother liquid distillation tower duty cycle, described in the pre- ash that is arranged in series
Bucket is two, and the preheating section of the ammonia still is connect with the first preliming tank, and the distilling period of the ammonia still and the second preliming tank connect
It connects, second preliming tank bottom is provided with low pressure steam inlet.
The method of the present invention for extending soda manufacture mother liquid distillation tower duty cycle, ammonia still mating at least two
Concatenated preliming tank is passed through heating steam in the bottom of at least one preliming tank, and maintain in preliming tank operation temperature 95~
110℃。
The method of the present invention for extending soda manufacture mother liquid distillation tower duty cycle, mating two series connection of ammonia still
Preliming tank, be passed through heating steam in the bottom of the second preliming tank, and maintain in preliming tank operation temperature at 100~101 DEG C.
The method of the present invention for extending soda manufacture mother liquid distillation tower duty cycle, mother liquor add from the top of ammonia still
The preheating section for entering ammonia still removes major part CO by preheating section2And free ammonia, then gravity flow pass sequentially through the first preliming tank and
Second preliming tank, then the distilling period of ammonia still is flowed back to, ash cream is added in the first preliming tank, ash cream reacts generation trip with ammonium chloride
From ammonia, it is passed through a certain amount of steam in second preliming tank, and maintains preliming tank operation temperature at 100~101 DEG C, has been reacted
Complete pre- lixivium is heated in the low-pressure steam that the distilling period of ammonia still is passed through by bottom, and free ammonia is steamed, and slops steams certainly
The discharge of ammonia tower bottom, distillation ammonia are discharged after the pre- hot mother liquor of preheating section of ammonia still through tower top.
The present invention by the way that multiple preliming tanks are connected, and is passed through a certain amount of steaming in mother liquor Distallation systm in preliming tank
Vapour controls the mode of operation temperature, to slow down scabbing for mother liquid distillation tower, in mother liquor distillation process, for bubble-cap tower or
Perforated plate column can reach the purpose for extending mother liquid distillation tower duty cycle using technology of the invention.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Marked in the figure: 1 is ammonia still, 1a is preheating section, and 1b is distilling period, and 2 be the first preliming tank, and 3 be the second preliming tank.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, a kind of device for extending soda manufacture mother liquid distillation tower duty cycle, including ammonia still 1 and string
Join two preliming tanks of setting, the ammonia still 1 divide for preheating section 1a and distilling period 1b, the preheating section 1a of the ammonia still 1 with
The connection of first preliming tank 2, the distilling period 1b of the ammonia still 1 is connect with the second preliming tank 3, in 3 bottom of the second preliming tank
It is provided with low pressure steam inlet.
The method for the extension soda manufacture mother liquid distillation tower duty cycle that the present invention uses is: making mating two strings of ammonia still
The preliming tank of connection is passed through heating steam in the bottom of the second preliming tank, and maintains in preliming tank operation temperature at 95~110 DEG C,
In the present embodiment, preferably maintain preliming tank in operation temperature at 100~101 DEG C.
The present invention can increase the reaction time using series connection preliming tank, extend the residence time of reactant in bucket, help
The CaSO in elimination liquid4Degree of supersaturation.At a temperature of aforesaid operations, CaSO4With CaSO4.1/2H2The crystallization of O form is precipitated,
The sandstone in the preliming tank with stirring and indigested lime solids particle provide crystal seed, the CaSO in liquid in bucket simultaneously4
It is constantly precipitated, is attached on solid particle crystal seed, the CaSO in liquid4It is supersaturated constantly to eliminate.It flows into and steams from the first preliming tank
CaSO between the pre- lixivium and tower bottom slops of ammonia tower4Degree of supersaturation difference is effectively reduced, the CaSO in tower in liquid4Big portion
Point with slops discharge tower outside, ammonia still distilling period scab situation be improved significantly, to extend destilling tower
Duty cycle.
Mother liquor distillation is carried out using the present apparatus, due to CaSO4Main control is precipitated in preliming tank, so as to cause preliming tank
Duty cycle shorten.But the inside of preliming tank only has agitating device, without remaining complicated internals, structure is compared with ammonia still
It is simple many, it scabs cleaning and cleaning labor intensity is substantially reduced.Preliming tank is used in series in the present apparatus, one of them into
The continuous operation of device is not influenced when row cleaning.
The present invention is applied widely, can be used for bubble-cap tower or perforated plate column technique, distills work for existing positive pressure
Skill, simple and effective using modification scheme of the invention, investment is low, does not influence the normal production run of existing apparatus.
Process flow of the invention is: the preheating section of ammonia still is added from the top of ammonia still for mother liquor, is removed by preheating section
Most of CO2And free ammonia, then gravity flow passes sequentially through the first preliming tank and the second preliming tank, then flows back to the distillation of ammonia still
Ash cream is added in section in the first preliming tank, and ash cream is reacted with ammonium chloride generates free ammonia, is passed through in second preliming tank certain
The steam of amount, and maintain preliming tank operation temperature at 100~101 DEG C, the distilling period quilt of the pre- lixivium of fully reacting in ammonia still
The low-pressure steam heating that bottom is passed through, free ammonia is steamed, and slops is discharged from ammonia still process tower bottom, distills ammonia in ammonia still
The pre- hot mother liquor of preheating section after be discharged through tower top.
Certain original distillation technique of alkali factory is distilled using positive pressure, and the distilling period of ammonia still is blister configuration, and preheating section is filler,
The mating ammonia still of one preliming tank, and it is spare to be equipped with a set of Distallation systm.There was only 2-3 the duty cycle of former ammonia still
Month, tower heavy workload is cleaned, the even running of device is influenced.After being transformed by this technology, it is passed through and adds in preliming tank bottom
Hot steam adjusts operating parameter, extends to 6 months or more the duty cycle of ammonia still, up to 1 year, steadily transports for factory
Row creates condition, and significantly reduces plant operation operating cost, hence it is evident that reduces labor intensity, creates for factory safety operation
Condition, with good economic efficiency and social benefit.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (5)
1. a kind of device for extending soda manufacture mother liquid distillation tower duty cycle, it is characterised in that: including ammonia still (1) and string
At least two preliming tanks for joining setting, are provided with low pressure steam inlet, the ammonia still (1) in the bottom of at least one preliming tank
It is divided into preheating section (1a) and distilling period (1b), the preheating section (1a) of the ammonia still (1) is connect with First preliming tank, the steaming
The distilling period (1b) of ammonia tower (1) is connect with last preliming tank.
2. the device according to claim 1 for extending soda manufacture mother liquid distillation tower duty cycle, it is characterised in that: described
The preliming tank being arranged in series is two, and the preheating section (1a) of the ammonia still (1) is connect with the first preliming tank (2), the ammonia still process
The distilling period (1b) of tower (1) is connect with the second preliming tank (3), the second preliming tank (3) bottom be provided with low-pressure steam into
Mouthful.
3. the method according to claim 1 or 2 for extending soda manufacture mother liquid distillation tower duty cycle, it is characterised in that:
The mating at least two concatenated preliming tanks of ammonia still, are passed through heating steam in the bottom of at least one preliming tank, and maintain pre- ash
Operation temperature is at 95~110 DEG C in bucket.
4. the method according to claim 3 for extending soda manufacture mother liquid distillation tower duty cycle, it is characterised in that: ammonia still process
The mating two concatenated preliming tanks of tower, are passed through heating steam in the bottom of the second preliming tank, and maintain operation temperature in preliming tank
At 100~101 DEG C.
5. the method according to claim 4 for extending soda manufacture mother liquid distillation tower duty cycle, it is characterised in that: mother liquor
The preheating section of ammonia still is added at the top of from ammonia still, major part CO is removed by preheating section2And free ammonia, then flow automatically and successively leads to
The first preliming tank and the second preliming tank are crossed, then flows back to the distilling period of ammonia still, ash cream, ash cream and chlorine are added in the first preliming tank
Change ammonium reaction and generate free ammonia, is passed through a certain amount of steam in second preliming tank, and maintain preliming tank operation temperature 100
~101 DEG C, the pre- lixivium of fully reacting is heated in the low-pressure steam that the distilling period of ammonia still is passed through by bottom, and free ammonia is steamed
Out, slops is discharged from ammonia still process tower bottom, and distillation ammonia is discharged after the pre- hot mother liquor of preheating section of ammonia still through tower top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810853135.0A CN109126177B (en) | 2018-07-30 | 2018-07-30 | Device and method for prolonging operation period of soda production mother liquor distillation tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810853135.0A CN109126177B (en) | 2018-07-30 | 2018-07-30 | Device and method for prolonging operation period of soda production mother liquor distillation tower |
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| CN109126177A true CN109126177A (en) | 2019-01-04 |
| CN109126177B CN109126177B (en) | 2021-06-29 |
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| CN201810853135.0A Active CN109126177B (en) | 2018-07-30 | 2018-07-30 | Device and method for prolonging operation period of soda production mother liquor distillation tower |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268694A (en) * | 2020-03-10 | 2020-06-12 | 邓守国 | Double-solid ammonia distillation method |
| CN111675227A (en) * | 2020-05-25 | 2020-09-18 | 山东海天生物化工有限公司 | Method for preventing pre-ash barrel from scabbing in distillation process in ammonia-soda process soda ash production |
| CN113800700A (en) * | 2020-06-11 | 2021-12-17 | 应城市新都化工有限责任公司 | High-efficient waste liquid ammonia still |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2946653A (en) * | 1956-09-05 | 1960-07-26 | Diamond Alkali Co | Ammonia-soda process improvements |
| SU1386566A1 (en) * | 1986-01-06 | 1988-04-07 | Предприятие П/Я А-3732 | Method of regenerating ammonia from filtered liquid of ammonia-sodium production |
| CN101121534A (en) * | 2007-07-31 | 2008-02-13 | 唐山三友化工股份有限公司 | Ammonia-soda process mother liquid distillation tower scaring-proof method |
| RU2389686C2 (en) * | 2007-07-03 | 2010-05-20 | Государственный научно-исследовательский и проектный институт основной химии (НИОХИМ) | Method of regenerating ammonia from ammonia-soda production filter liquid |
| CN102145912A (en) * | 2011-03-01 | 2011-08-10 | 大连大化工程设计有限公司 | Process for preparing calcium chloride solution by utilizing ammonia soda filtration mother liquor |
| CN103693701A (en) * | 2013-12-30 | 2014-04-02 | 唐山三友化工股份有限公司 | Ammonia distillation device and technology by mother liquor and total ash powder with alkaline method |
-
2018
- 2018-07-30 CN CN201810853135.0A patent/CN109126177B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2946653A (en) * | 1956-09-05 | 1960-07-26 | Diamond Alkali Co | Ammonia-soda process improvements |
| SU1386566A1 (en) * | 1986-01-06 | 1988-04-07 | Предприятие П/Я А-3732 | Method of regenerating ammonia from filtered liquid of ammonia-sodium production |
| RU2389686C2 (en) * | 2007-07-03 | 2010-05-20 | Государственный научно-исследовательский и проектный институт основной химии (НИОХИМ) | Method of regenerating ammonia from ammonia-soda production filter liquid |
| CN101121534A (en) * | 2007-07-31 | 2008-02-13 | 唐山三友化工股份有限公司 | Ammonia-soda process mother liquid distillation tower scaring-proof method |
| CN102145912A (en) * | 2011-03-01 | 2011-08-10 | 大连大化工程设计有限公司 | Process for preparing calcium chloride solution by utilizing ammonia soda filtration mother liquor |
| CN103693701A (en) * | 2013-12-30 | 2014-04-02 | 唐山三友化工股份有限公司 | Ammonia distillation device and technology by mother liquor and total ash powder with alkaline method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111268694A (en) * | 2020-03-10 | 2020-06-12 | 邓守国 | Double-solid ammonia distillation method |
| CN111675227A (en) * | 2020-05-25 | 2020-09-18 | 山东海天生物化工有限公司 | Method for preventing pre-ash barrel from scabbing in distillation process in ammonia-soda process soda ash production |
| CN111675227B (en) * | 2020-05-25 | 2022-06-07 | 山东海天生物化工有限公司 | Method for preventing pre-ash barrel from scabbing in distillation process in ammonia-soda process soda ash production |
| CN113800700A (en) * | 2020-06-11 | 2021-12-17 | 应城市新都化工有限责任公司 | High-efficient waste liquid ammonia still |
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| CN109126177B (en) | 2021-06-29 |
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