CN112777613B - Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production - Google Patents
Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production Download PDFInfo
- Publication number
- CN112777613B CN112777613B CN202110124308.7A CN202110124308A CN112777613B CN 112777613 B CN112777613 B CN 112777613B CN 202110124308 A CN202110124308 A CN 202110124308A CN 112777613 B CN112777613 B CN 112777613B
- Authority
- CN
- China
- Prior art keywords
- carbonization
- tower
- carbonization tower
- material conveying
- separator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/12—Preparation of carbonates from bicarbonates or bicarbonate-containing product
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D7/00—Carbonates of sodium, potassium or alkali metals in general
- C01D7/18—Preparation by the ammonia-soda process
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Carbon And Carbon Compounds (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to the technical field of soda ash production, in particular to a method for improving carbon in soda ash productionThe technological process of carbonizing reaction material crystal granularity in carbonizing tower includes feeding the carbonized material into separator via material conveying pipeline, separating material liquid in the upper part of the separator, and feeding the separated material liquid into carbonizing tower via reflux pipe to participate in carbonizing reaction. The process method improves NaHCO in the carbonization tower 3 The crystal grain size and the crystal grain size distribution are uniform.
Description
Technical Field
The invention relates to the technical field of soda production, in particular to a process method for improving crystallization granularity of carbonization reaction materials in a carbonization tower in soda production.
Background
In soda ash production, ammonia water carbonization is the most complex process involving a lot of process conditions, physical and chemical changes. The operation condition and the process index directly influence the product yield, the quality and the material consumption, and play a significant role in the economic benefit of enterprises. In the carbonization process of the alkali-making tower, the NaHCO with coarse particles is prepared as much as possible under the condition of striving to improve the NaCl conversion rate 3 Crystallization, CO in carbonization process 2 The gas enters from the tower bottom and the tower in two sections, the pre-carbonized liquid enters from the tower top, and the pre-carbonized liquid are in countercurrent contact in the tower to generate NaHCO through absorption reaction 3 And (5) crystallizing. In order to improve NaHCO in the materials after carbonization reaction in the carbonization tower in the prior art 3 The granularity of the crystal, the heat of the reaction of the upper ammonia water and carbon dioxide in the carbonization tower increases the reaction temperature to increase NaHCO 3 The supersaturation degree, then through setting up coolant tank (coolant tank's inside is equipped with condenser tube) inside the carbonization tower and come the gradual reduction temperature and make it produce the crystal nucleus and make the crystallization grow gradually, but the change of supersaturation degree's size and temperature gradient directly influences crystal nucleus formation process and crystal nucleus growth process, finally influences the granularity and the particle size distribution of crystal in the product. Therefore, in order to solve the above problems, it is necessary to establish a process for increasing the crystallization granularity of the carbonized reaction material in the carbonization tower in the production of sodium carbonate.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects of the prior art, a process method for improving the crystallization granularity of carbonization reaction materials in a carbonization tower in the production of sodium carbonate is provided, and the process method improves the NaHCO in the carbonization tower 3 The crystal grain size and the crystal grain size distribution are uniform.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a process method for improving crystallization granularity of carbonization reaction materials in a carbonization tower in sodium carbonate production comprises the steps that materials subjected to carbonization reaction in the carbonization tower enter a separator through a material conveying pipeline, and feed liquid which is positioned at the upper part of the separator after separation enters the carbonization tower through a return pipe to participate in carbonization reaction.
As an improved technical scheme, the separator comprises a body, the body comprises a straight section and a cone section which are communicated with each other, a feeding pipe is arranged on one side of the upper portion of the straight section, an upper discharging pipe is arranged at the middle position of the top of the straight section, and a lower discharging pipe is arranged at the bottom of the cone section.
As an improved technical scheme, the upper discharging pipe is communicated with the carbonization tower through a return pipe, and an alkali liquor storage tank is arranged below the lower discharging pipe.
As an improved technical scheme, the distance from the center of a reflux port on the carbonization tower, which is communicated with the reflux pipe, to the bottom of the carbonization tower is 944.5-1234.5cm.
As an improved technical scheme, the distance between the center of a discharge hole communicated with a material conveying pipeline on the carbonization tower and the bottom of the carbonization tower is 25-30cm.
As an improved technical scheme, the material conveying pipeline is provided with a material conveying pump, the lift of the material conveying pump is 42-48m, and the flow is 18-25m 3 And/h, the outlet pressure is about 0.5-0.6MPa.
After the technical scheme is adopted, the invention has the beneficial effects that:
the process of the invention comprises that part of feed liquid in the carbonization tower enters the separator through a material conveying pump, the feed liquid containing large particles in the separator under the action of centrifugal force enters an alkali liquid storage tank from top to bottom along the inner wall of the separator through a lower discharge pipe, the feed liquid in the alkali liquid storage tank (part of the feed liquid is sourced from a discharge hole at the bottom of the carbonization tower, and the other part of the feed liquid is sourced from a lower discharge hole after the separation of the separator, and then the feed liquid is subjected to filter pressingThe feed liquid containing small particles enters the carbonization tower along the return pipe under the pressure of the material conveying pump to continuously participate in carbonization reaction, and as the returned feed liquid contains sodium bicarbonate crystals with small particles, part of the feed liquid is used as seed crystals, the generation of a large amount of fine seed crystals in the tower can be reduced, and NaHCO in the carbonized feed liquid is promoted 3 The crystal grows. The method is convenient for filtering, can reduce the consumption of washing water, reduce the dissolution and filtration penetration loss, and has less water content in filter cakes, so that the treatment capacity of the calciner is increased, the energy is saved, and the method is convenient for packaging and transportation.
Drawings
FIG. 1 is a process flow diagram of the carbonization reaction stage of the process of the present invention;
wherein, 1-carbonization tower, 10-return port, 11-discharge port, 2-return pipe, 3-separator, 4-material conveying pipeline, 5-material conveying pump, 6-alkali liquor storage tank, 7-filter, 8-steam pipeline, 9-cleaning liquid pipeline, 12-alkali liquor discharge pipeline.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
A process for increasing the granularity of the carbonized material in carbonizing tower in sodium carbonate production features that the carbonized material in carbonizing tower is delivered to separator via material delivering pipeline, and the separated liquid is delivered to carbonizing tower via reflux pipe.
Wherein the distance between the center of the reflux port on the carbonization tower and the bottom of the carbonization tower is 944.5cm.
Wherein the distance between the center of a discharge hole communicated with the material conveying pipeline on the carbonization tower and the bottom of the carbonization tower is 30cm.
Wherein the material conveying pipeline is provided with a material conveying pump, the lift of the material conveying pump is 42m, and the flow is 25m 3 /h, outlet pressure of about0.52MPa。
Example 2
A process for increasing the granularity of crystal in carbonizer in sodium carbonate production features that the material after carbonizing reaction in carbonizer is delivered to separator via pipeline, and the separated liquid is delivered to carbonizer via reflux tube for carbonizing reaction.
Wherein the distance between the center of the reflux port on the carbonization tower and the bottom of the carbonization tower is 1100.5cm.
Wherein the distance between the center of a discharge hole communicated with the material conveying pipeline on the carbonization tower and the bottom of the carbonization tower is 28cm.
Wherein the material conveying pipeline is provided with a material conveying pump, the lift of the material conveying pump is 45m, and the flow is 22m 3 And/h, an outlet pressure of about 0.55MPa.
Example 3
A process for increasing the granularity of crystal in carbonizer in sodium carbonate production features that the material after carbonizing reaction in carbonizer is delivered to separator via pipeline, and the separated liquid is delivered to carbonizer via reflux tube for carbonizing reaction.
Wherein the distance between the center of the reflux port on the carbonization tower and the bottom of the carbonization tower is 1234.5cm.
Wherein the distance between the center of a discharge hole communicated with the material conveying pipeline on the carbonization tower and the bottom of the carbonization tower is 30cm.
The lift of the material conveying pump is 48m, and the flow is 18m 3 And/h, an outlet pressure of about 0.6MPa.
The separator in embodiments 1-3 includes a body, the body includes a straight section (diameter phi 360mm, height 540 mm) and a cone section (height 730 mm) that are mutually communicated, a feed pipe is disposed on one side of the upper portion of the straight section (the feed pipe is disposed along a tangential direction of a cylinder body of the straight section), an upper discharge pipe is disposed at a middle position of the top of the straight section (one end of the upper discharge pipe is disposed inside the straight section of the separator, the height of the upper discharge pipe is 290 mm), a lower discharge pipe is disposed at the bottom of the cone section, the upper discharge pipe is communicated with the carbonization tower through a return pipe, and an alkali liquor storage tank is disposed below the lower discharge pipe.
In order to better demonstrate the process of the present invention, 5 comparative examples are given with reference to example 1.
Comparative example 1
The materials in the carbonization tower adopt the operation of the prior art during carbonization reaction: the materials in the carbonization tower are cooled after being heated by the reaction heat of the materials in the carbonization tower (a cooling water pipe is arranged in the cooling water tank and is cooled by cooling water or coolant media such as seawater in the cooling water pipe) in the carbonization tower. All materials after carbonization reaction directly enter the alkali liquor storage tank through the material conveying pump, and part of the material liquid is not separated by the separator and returns to the carbonization tower for continuous carbonization reaction.
Comparative example 2
Compared to example 2, the only difference is that: the distance from the center of the reflux port on the carbonization tower to the bottom of the carbonization tower is 930cm.
Comparative example 3
Compared to example 2, the only difference is that: the distance from the center of the reflux port on the carbonization tower to the bottom of the carbonization tower is 1250cm.
Under the process methods of examples 1-3 and comparative examples 1-3, 500ml of the feed liquid after carbonization reaction in the carbonization tower is placed in a measuring cylinder (wherein 3 parallel are respectively carried out on the carbonized feed liquid in each example and comparative example, namely, 3 measuring cylinders are respectively adopted for placing the feed liquid after carbonization reaction in each example or comparative example, settling and layering time is observed by standing, the settling time in a data table is the average time measured in 3 parallel), and the settling time of the feed liquid is observed by standing; materials after carbonization reaction in the process methods of examples 1 to 3 and comparative examples 1 to 5 enter an alkali liquor storage tank, and then are filtered and washed by a filter, and the water consumption and filtration loss indexes are shown in Table 1.
TABLE 1
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (1)
1. A process method for improving crystallization granularity of carbonization reaction materials in a carbonization tower in sodium carbonate production is characterized by comprising the following steps of: the process method is that materials after carbonization reaction in the carbonization tower enter a separator through a material conveying pipeline, and feed liquid at the upper part of the separator after separation enters the carbonization tower through a return pipe to participate in carbonization reaction; the distance between the center of the reflux port on the carbonization tower and the bottom of the carbonization tower is 944.5-1234.5cm;
the separator comprises a body, wherein the body comprises a straight barrel section and a conical barrel section which are mutually communicated, a feeding pipe is arranged on one side of the upper part of the straight barrel section, an upper discharging pipe is arranged in the middle of the top of the straight barrel section, and a lower discharging pipe is arranged at the bottom of the conical barrel section; the distance between the center of a discharge hole on the carbonization tower and the bottom of the carbonization tower is 25-30cm; the material conveying pipeline is provided with a material conveying pump, the lift of the material conveying pump is 42-48m, and the flow is 18-25m 3 And/h, the outlet pressure is 0.5-0.6MPa;
the upper discharging pipe is communicated with the carbonization tower through a return pipe, and an alkali liquor storage tank is arranged below the lower discharging pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124308.7A CN112777613B (en) | 2021-01-29 | 2021-01-29 | Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110124308.7A CN112777613B (en) | 2021-01-29 | 2021-01-29 | Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112777613A CN112777613A (en) | 2021-05-11 |
| CN112777613B true CN112777613B (en) | 2023-06-06 |
Family
ID=75759662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110124308.7A Active CN112777613B (en) | 2021-01-29 | 2021-01-29 | Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112777613B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432041A (en) * | 2011-09-19 | 2012-05-02 | 四川和邦股份有限公司 | Carbonization cleaning process of carbonizer for producing heavy soda ash |
| CN104402023B (en) * | 2014-11-12 | 2016-08-31 | 天津渤化永利化工股份有限公司 | A kind of production method improving carbonizatin method sodium bicarbonate product granularity |
| CN105836765B (en) * | 2015-01-13 | 2017-08-15 | 青岛海湾集团有限公司 | The cleaning method of carbonators in a kind of sodium bicarbonate production |
| EP3353115A1 (en) * | 2015-09-23 | 2018-08-01 | Solvay SA | Production of crystalline sodium bicarbonate |
| CN205653182U (en) * | 2016-04-07 | 2016-10-19 | 天津渤化永利化工股份有限公司 | Improve device of carbonization sodium bicarbonate granularity |
| 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 |
-
2021
- 2021-01-29 CN CN202110124308.7A patent/CN112777613B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN112777613A (en) | 2021-05-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108128961A (en) | Brine waste zero emission method and system | |
| CN208008627U (en) | Brine waste zero emission system | |
| CN113620355B (en) | Preparation method and preparation device of battery anode material powder | |
| CN108358220A (en) | A kind of method and apparatus producing sodium bicarbonate | |
| CN110732154A (en) | internal circulation reaction crystallizer | |
| CN112516616A (en) | Crystallization device and method for purifying ethylene carbonate | |
| CN111792653A (en) | Production method for preparing spherical salt by single-effect evaporation by utilizing mechanical thermal compression technology | |
| CN112777613B (en) | Technological method for improving crystallization granularity of carbonization reaction materials in carbonization tower in sodium carbonate production | |
| CN218222393U (en) | Device for preparing battery-grade lithium carbonate by refining and purifying industrial-grade lithium carbonate | |
| CN108467051B (en) | Device and method for separating crystals in potassium chloride crystal slurry | |
| CN112516615A (en) | Device and method for crystallization purification | |
| KR20130100332A (en) | Apparatus for manufacturing fine powder of high purity silicon | |
| CN115448523A (en) | Device for recovering lithium in lithium precipitation mother liquor | |
| CN112919506B (en) | Device and method for continuously producing lithium chloride from salt lake lithium-rich brine | |
| CN112370856B (en) | Filtration and separation system and method for recovering ethylene oligomerization catalyst fine powder by dry method | |
| CN113845132B (en) | System and process for preparing battery-grade lithium carbonate | |
| CN206751588U (en) | A kind of processing system of tertiary cathode material production waste water | |
| CN203529949U (en) | Device for dilution crystallization of coked rough ammonium sulfate | |
| CN220351733U (en) | Device for separating oxalate in sodium aluminate solution | |
| CN109806613B (en) | Continuous freezing crystallizer and scab removing method thereof | |
| CN217613030U (en) | Battery-grade manganese sulfate production system | |
| CN216366692U (en) | Device for improving yield of baking soda | |
| CN109126225A (en) | A kind of rotational flow settlement device | |
| CN115893454B (en) | Method for efficiently producing ultrapure lithium carbonate with uniform and stable granularity | |
| CN218709764U (en) | Device for recovering lithium from lithium precipitation mother liquor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |