CN201313822Y - Thermal dehydration installation for carnallite - Google Patents
Thermal dehydration installation for carnallite Download PDFInfo
- Publication number
- CN201313822Y CN201313822Y CNU2008201288798U CN200820128879U CN201313822Y CN 201313822 Y CN201313822 Y CN 201313822Y CN U2008201288798 U CNU2008201288798 U CN U2008201288798U CN 200820128879 U CN200820128879 U CN 200820128879U CN 201313822 Y CN201313822 Y CN 201313822Y
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- CN
- China
- Prior art keywords
- kettle
- carnallitite
- thermal dehydration
- kettle body
- dehydration
- Prior art date
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- Expired - Fee Related
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- 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
- Y02P20/10—Process efficiency
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- Manufacture And Refinement Of Metals (AREA)
Abstract
The utility model relates to a thermal dehydration installation, in particular to a thermal dehydration installation for carnallite. The thermal dehydration installation has the following characteristics: the thermal dehydration installation comprises a horizontal kettle body and a heater under the kettle body, wherein mechanical agitating cutters driven by a variable-frequency motor are fixed along an axial direction in the kettle body; an inspection hole is arranged on the top of the kettle body; the lower side of the kettle body is provided with a deslagging hole and a finished product-discharging outlet; and a two-stage holed dehydration partition plate which divides the kettle body into a front chamber and a rear chamber is arranged in the middle of the kettle body. The utility model has the advantages of unique structure, high automation degree, advanced technique and environment-friendliness.
Description
Technical field
The utility model relates to a kind of thermal dehydration equipment, especially relates to a kind of thermal dehydration device of carnallitite.
Background technology
The dehydration of carnallitite generally is divided into two stages and carries out: the fs is that six water carnallitites are taken off to two water carnallitites.This phase temperature is controlled between 120 ℃～140 ℃ better, if temperature is too high more than 167.5 ℃ the time, six water carnallitites will be melted in the oneself crystal water, and press following formula decomposition: KClMgCl
26H
2O → KCI+MgCl
26H
2O and MgCl
26H
2The O dehydration is difficulty, and will aggravate hydrolysis.Subordinate phase is to slough two remaining in carnallitite crystal water, generates anhydrous carnallite.That is: KClMgCl
22H
2O → KClMgCl
2+ 2H
2O.This process also can produce hydrolysis reaction, and its reaction process is: KClMgCl
22H
2O → MgOHClKCl+HCl+2H
2O MgOHClKCl → MgO+KCl+HCl dehydration temperaturre under normal conditions directly influences the percent hydrolysis of material, experiment showed, repeatedly that the subordinate phase temperature is controlled at can obtain water content and the low dehydration material of percent hydrolysis between 180 ℃～210 ℃.USSR (Union of Soviet Socialist Republics) is the country of unique in the world employing carnallitite refining magnesium, have the history in more than 60 year so far, they are to use rotary kiln to carry out the primary dewatering of potassium carnallitite earlier, just got down to later the research of the boiling dehydration technique of carnallitite in 1956, just all replaced rotary kiln with fluidizing furnace the sixties, and dehydration material quality is improved greatly.China begins the research of this respect from the eighties, by experiment and with reference to the pertinent data of USSR (Union of Soviet Socialist Republics), carried out the type approval test of potassium carnallitite refining magnesium in relevant magnesium factory, has obtained certain success in that the fluidizing furnace dewatering process is technical.But still there is certain deficiency in the fluidizing furnace dehydration at aspects such as technology, efficient.
The boiling thermal dehydration is that carnallitite and fuel mix are put into process furnace, lean on of the carnallitite stirring of the power of air distribution with melting state, degree of uniformity is difficult to control, just easy balling in ebullated bed, its ball weight is big, be difficult for discharging out of the furnace, moisture also is difficult for overflowing in the ball, these ball pieces are trapped in sieve plate top and float, and rubbing mutually between the ball piece produces the superfine dust of many granularities, and giving gathers dust brings a lot of difficulties, reduced the casting yield of magnesium, how the ball piece has accumulated the fluidized state that will worsen ebullated bed, needs the blowing out cleaning, influences the normal running of fluidizing furnace.And fuel directly contacts with raw material, and the oxygen in the combustion air can cause the oxidation of magnesium, generates magnesium oxide, and impurities in raw materials also can't be discharged, and product purity is lower.The fuel that the boiling thermal dehydration uses can only be gas, production cost height, the emergent difficulty that substitutes.And contain materials such as many carnallitite dust and HCl in the tail gas, tail gas its wastewater treatment difficulty after washing, even can't handle.
Except fluidizing furnace dewatering process technology, still continue to use the primary fixed bed process in China, not only there is not molding device, production efficiency is low, and atmospheric pollution is serious, causes great destruction to environment, even causes casualties.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of structure uniqueness, level of automation height, technology advanced person is provided, is beneficial to the dehydration of carnallitite of environmental protection and the refining plant of tail gas.
The utility model is realized in the following way:
A kind of thermal dehydration device of carnallitite, it is characterized in that: it comprises the heating unit of a horizontal kettle and its underpart, in axial direction be fixed with the machinery that is driven by variable-frequency motor in the kettle and stir cutter, the inspection window that its top is provided with, cinder cleaning hole and the finished product discharge port that its underpart is provided with, the kettle middle part is provided with two stages of foraminous of the establishing dehydration dividing plate that it is divided into former and later two chambers;
Described heating unit is to be formed by shell, burner hearth, thermal insulation layer and burner assembling;
In described kettle and burner hearth, be equipped with thermopair;
The heating unit of described kettle and its underpart links together by the kettle supporter;
It is cylindrical that described kettle is served as reasons and is processed into.
The utility model has following effect:
1) structure uniqueness: the device that the utility model provides comprises: machinery stirs the dewater built-in electroheat pair that is complementary of dividing plate with holes, coal gas or coal burner, kettle and burner hearth, kettle inspection window, cinder cleaning hole, the outlet of finished product material, kettle of cutter, two stages and supports and the burner hearth molectron in the cylindrical industrial stainless steel dewatering kettle, variable-frequency motor, kettle.Kettle supports by shaped steel and is connected with kettle and is supported in body of heater.Be the alumina firebrick burner hearth below the kettle, insulating be set outward, build by laying bricks or stones with common brick and get final product again.
The finished product hopper is industrial stainless steel and makes, and wherein kettle adopts the 316L steel.
2) level of automation height: after raw material is delivered to hopper by former feed bin by worm conveyor, enter the dehydration kettle, kettle is divided into former and later two chambers by dividing plate, kettle is burner hearth down, be save energy, position, two chambers provides heating by same burner hearth, but finish the required suitable temp of twice dehydration for guaranteeing two chambers, fire box temperature is controlled at 800 ℃-825 ℃, and adjust input speed according to the working temperature of electroheat pair control, real in controlling residence time of raw material, make the 1st chambers temp after finishing the fs dehydration between 180 ℃～360 ℃, the fused carnallitite flows into Room the 2nd by the dividing plate perforate, make temperature be increased to the dehydration of finishing subordinate phase between 360 ℃～700 ℃ by rapid intensification, the temperature of indoor raw material is controlled by electroheat pair, flow into discharge pipe through discharge port afterwards, pipeline outsourcing insulating ceramic electrothermal sleeve, with the line clogging that prevents to lower the temperature and cause, after the finished product material enters hopper by pipeline, automatically control conveying belt through steel and deliver to jaw crusher, deliver to by rotary conveyor again and enter the electronics automatic loading machine after pulverizer is pulverized, after can pack.For the small amount of H Cl gas that produces owing to hydrolysis reaction in the dehydration, be delivered to spray column by kettle top output channel and graphite cooler cooling back by induced draft fan, caustic soda steam-NaOH with the shower ejection, neutralization reaction takes place, sodium-chlor after the neutralization reaction and water directly flow into settling tank by gravity line at the bottom of the tower, and water vapour is discharged by chimney.Flue gas in the burner hearth also is delivered to spray column by induced draft fan by the output channel of kettle end after the graphite cooler cooling, yellow soda ash after the after chemical reaction and water directly flow into settling tank by gravity line at the bottom of the tower, and water vapour is discharged by chimney.Autoclave body bottom is provided with discharge outlet, and with the waste residue that produces in the dehydration, regular discharges from discharge outlet.
3) the utility model whole-process automatic control can be moved continuously, by in kettle and the burner hearth thermopair being set, and effectively controls working temperature according to the dehydration temperaturre of carnallitite, and dewatering efficiency can reach 100%.
4) the dehydration kettle among the present invention is a horizontal, and fixed bed more in the past or vertical fluidizing furnace have plurality of advantages, and horizontal kettle heating surface area is big, be easy to stir, be heated evenly, and has avoided quick-fried pot or quick-fried stove, ensures safety in production.Adopt the perforate dividing plate to isolate simultaneously, and regulate and control raw material dehydration temperaturre, saved fuel effectively, reduced CO by different raw material volumes and input speed
2Discharging, and improved the quality of product.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Embodiment
A kind of thermal dehydration device of carnallitite, as shown in Figure 1: it comprises the heating unit 2 of a horizontal kettle 1 and its underpart, in axial direction be fixed with the machinery that drives by variable-frequency motor 3 in the kettle 1 and stir cutter 4, the inspection window 5 that its top is provided with, cinder cleaning hole 6 that its underpart is provided with and finished product discharge port 7, kettle 1 middle part is provided with two stages of foraminous of the establishing dehydration dividing plate 8 that it is divided into former and later two chambers, heating unit 2 is by shell 9, burner hearth 10, thermal insulation layer 11 and burner 12 assemble, in described kettle 1 and burner hearth 10, be equipped with thermopair, the heating unit 2 of kettle 1 and its underpart links together by kettle supporter 13, and it is cylindrical that kettle 1 is served as reasons and is processed into.
Worm conveyor carries out frequency conversion drive by variable-frequency motor, and the carnallitite in the former feed bin is delivered to hopper, enters kettle by the open-close type hopper, kettle is divided into former and later two thermal dehydration chambers with dividing plate, carry out perforate at the dividing plate certain altitude, replaced pipe connection, prevent to stop up; Kettle for the burner hearth heating unit, provides heating by coal gas or coal dust firing down, the electroheat pair that is complementary that kettle is built-in, control working temperature; Stir cutter in the kettle, and drive by kettle end variable-frequency motor,, prevent to condense to stir carnallitite by axis, make be heated more even;
After raw material enters kettle, begin the heated and stirred dehydration of fs in kettle Room the 1st, along with raw material constantly enters, the carnallitite of finishing fs dehydration, molten state is gone into kettle Room the 2nd by the dividing plate orifice flow and is carried out the dehydration of subordinate phase, flow into discharge pipe through discharge port afterwards, pipeline outsourcing insulating ceramic electrothermal sleeve, with the line clogging that prevents to lower the temperature and cause, after the finished product material enters hopper by pipeline, automatically control conveying belt through steel and deliver to jaw crusher, deliver to by rotary conveyor again and enter the electronics automatic loading machine after pulverizer is pulverized, after can pack.
Carnallitite at first carries out first time dehydration the 1st dewatering station, reaches after the molten state to go into the 2nd thermal dehydration chamber by the dividing plate orifice flow and carry out second time and dewater, and enters finished product material recovery system by discharge port at last.
Kettle has cinder cleaning hole, regularly carries out scarfing cinder.The top is provided with inspection window, convenient inspection temporarily.
The HCl gas that produces in the dehydration is from the output channel output of kettle end, after the graphite cooler cooling, be delivered to spray column by acidproof induced draft fan, by the acid resisting concrete shoring of foundation, chemical neutralization reaction takes place in the NaOH mist vapour of HCl and the ejection of porous shower, water that generates and NaCl and flow into settling tank by gravity line at the bottom of the deadweight effect sinks down into tower.
Flue gas in the burner hearth also passes through graphite cooler, is delivered to spray column by acidproof induced draft fan, the CO that burning produces
2Chemical reaction, the Na of generation take place with NaOH
2CO
3With water at the bottom of the deadweight effect sinks down into tower, and flow into settling tank by gravity line.
Claims (5)
1. the thermal dehydration device of a carnallitite, it is characterized in that: it comprises the heating unit (2) of a horizontal kettle (1) and its underpart, in axial direction be fixed with the machinery that is driven by variable-frequency motor (3) in the kettle (1) and stir cutter (4), the inspection window (5) that its top is provided with, cinder cleaning hole (6) and the finished product discharge port (7) that its underpart is provided with, kettle (1) middle part is provided with two stages of foraminous of the establishing dehydration dividing plate (8) that it is divided into former and later two chambers.
2. the thermal dehydration device of carnallitite as claimed in claim 1, it is characterized in that: described heating unit (2) is to be assembled by shell (9), burner hearth (10), thermal insulation layer (11) and burner (12).
3. the thermal dehydration device of carnallitite as claimed in claim 1 or 2 is characterized in that: be equipped with thermopair in described kettle (1) and burner hearth (10).
4. the thermal dehydration device of carnallitite as claimed in claim 1, it is characterized in that: the heating unit (2) of described kettle (1) and its underpart links together by kettle supporter (13).
5. the thermal dehydration device of carnallitite as claimed in claim 1, it is characterized in that: it is cylindrical that described kettle (1) is served as reasons and is processed into.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201288798U CN201313822Y (en) | 2008-11-29 | 2008-11-29 | Thermal dehydration installation for carnallite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201288798U CN201313822Y (en) | 2008-11-29 | 2008-11-29 | Thermal dehydration installation for carnallite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201313822Y true CN201313822Y (en) | 2009-09-23 |
Family
ID=41125614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201288798U Expired - Fee Related CN201313822Y (en) | 2008-11-29 | 2008-11-29 | Thermal dehydration installation for carnallite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201313822Y (en) |
-
2008
- 2008-11-29 CN CNU2008201288798U patent/CN201313822Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090923 Termination date: 20091229 |