CN102381848A - Efficient direct-heating gypsum calcination rotary kiln - Google Patents
Efficient direct-heating gypsum calcination rotary kiln Download PDFInfo
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- CN102381848A CN102381848A CN2011102088066A CN201110208806A CN102381848A CN 102381848 A CN102381848 A CN 102381848A CN 2011102088066 A CN2011102088066 A CN 2011102088066A CN 201110208806 A CN201110208806 A CN 201110208806A CN 102381848 A CN102381848 A CN 102381848A
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Abstract
The invention relates to building material processing equipment and in particular to an efficient direct-heating gypsum calcination rotary kiln. The rotary kiln is provided with a horizontal rotating cylinder equipped with a support rotary drive mechanism, wherein the cylinder is internally provided with an import section equipped with a guide plate, a dehydration section equipped with a raising plate, a calcination section and an export section equipped with a guide plate, an inlet is arranged on the front end of the cylinder, and an outlet is arranged on the rear end of the cylinder. The efficient direct-heating gypsum calcination rotary kiln is characterized in that a calcination suspended chain is hung at the periphery of the cylinder wall at the calcination section of the cylinder, and a single cylinder and double cylinders are respectively designed according to change of material characteristics and different requirements for product quality indexes. The efficient direct-heating gypsum calcination rotary kiln has the advantages of simple technological structure, high efficiency and low energy consumption, and is convenient in operation; the product produced by the rotary kiln has good and stable quality; and the rotary kiln is mainly applied to dehydration and calcination of natural gypsum and industrial byproduct gypsum.
Description
(1) technical field: the present invention relates to the treatment facility of material of construction, especially a kind of highly effective directly-heated gypsum calcination rotary kiln.
The (2) background technology: the plaster of paris and industry by-product gypsum are to exist with the sulfate dihydrate calcium form, and two crystal water are arranged in its molecular formula, need slough a hypocrystalline water during actual the use and make it generate calcium sulphate hemihydrate, and this process is exactly the calcining of gypsum.
Just become the widely used plaster of Paris of building trade through the gypsum after the calcining owing to have gelating property.The calciner of plaster of Paris is of a great variety, and its production technique is also different with the difference of calciner, receives the difference of hot mode can be divided into indirect heating and direct heating like dehydration; Can be divided into single stage method and two step method by dewatering type; Can be divided into fast dewatering calcining and dehydration calcining at a slow speed by the dehydration calcinating speed; Can be divided into intermittent take-off and continuous discharging etc. by the input and output material mode.Calciner then has frying pan, fluidizing furnace, air-flow calcining machine, the polishing of sauce base, those special mills of this moral calcining furnace, rotary kiln etc., and these calciners differ from one another and also respectively have superiority and deficiency.
Tradition direet-heating type rotary calciner is because the simple efficient of device structure is high; Successfully be applied to the calcination process of cement and lime industry; But when calcined gypsum is particularly calcined industry by-product gypsum owing to need remove higher gypsum appearance water earlier and then slough a hypocrystalline water; When the fluctuation of raw material moisture content and gypsum composition is big; Be difficult to disposable completion dehydration and calcining in kiln stably, reenter the kiln calcining to slough crystal water, two step method that Here it is calcining after the oven dry that often need carry out appearance water earlier makes appearance water reach a stable numerical value.Two step method incinerating advantage is that dehydration is in different equipment, to accomplish separately with calcining, thereby control is convenient, produces relatively stablely, and quality product is easy to assurance.But need independent drying plant and input and output material and relay storage system owing to slough appearance water; And often dryer uses different equipment and system with calcining; Add continuous frying pan and air stream drying adds modes such as fluidizing furnace like present domestic air stream drying commonly used; Make technology become complicated, thermosteresis increases, and energy consumption increases.On the other hand, gypsum calcination calcined by rotary kiln section commonly used at present is to adopt the lifting plank frame, and promptly material forms and expects that curtain directly contacts and heat exchange with hot gas flow, further sloughs crystal water.But particularly the industry by-product gypsum particle is very thin owing to gypsum, between 10um to 140um, sloughs appearance water later on particularly when sloughing crystal water usually; Unit weight reduces rapidly, and it is thinner that particle becomes, and is very easily directly taken out of outside the kiln by hot gas flow; Shorten calcination time, for this reason, or increase the kiln body length to increase the residence time; Add the Dayao footpath with reduction cross section wind speed, thereby make equipment become huge.
The (3) summary of the invention: it is complicated that the object of the invention will solve existing two step method calcining process exactly; Thermosteresis is big, and energy consumption is high, though traditional single stage method rotary kiln technology is simple, thermosteresis is little; But problems such as unstable product quality provide a kind of highly effective directly-heated gypsum calcination rotary kiln.
The present invention is directed to gypsum raw material quality parameter, moisture content, and the fluctuation situation of fuel characteristic different, two kinds of solutions have been proposed:
Scheme one: a kind of highly effective directly-heated gypsum calcination rotary kiln; (fluctuation that is suitable for the crude fuel quality parameter within allowed band time) has horizontally-arranged rotating cylinder; Dispose the bearing and turning driving mechanism, be divided into introduction segment in the cylindrical shell and charging guide plate, dewatering period are installed material delivering plate, calcining section are installed and derive section charging guide plate is installed, barrel front end is import; The rear end is outlet, and it is characterized in that: the calcining section at cylindrical shell is lifted with the calcining stretched wire along the barrel periphery.
Scheme two: a kind of highly effective directly-heated gypsum calcination rotary kiln; (it is bigger to be suitable for the fluctuation of crude fuel quality parameter; Or when having adjustment to require to the quality index of product) have dehydration cylindrical shell and calcining cylindrical shell, two cylindrical shells dispose the bearing and turning drive unit separately, are divided into introduction segment in the said dehydration cylindrical shell and charging guide plate, dewatering period are installed material delivering plate are installed, derive section charging guide plate is installed; Barrel front end is import, and the rear end is outlet; Be divided into introduction segment in the said calcining cylindrical shell and charging guide plate, calcining section be installed and derive section charging guide plate is installed, barrel front end is import, and the rear end is outlet; It is characterized in that: the outlet of said dehydration cylindrical shell is docked with the import of calcining cylindrical shell each other; And the calcining section at the calcining cylindrical shell is lifted with the calcining stretched wire along the barrel periphery.
The introduction segment at cylindrical shell described in the present invention program one and two is equipped with breaks up device.
The stretched wire of calcining described in the present invention program one and two is many row's curtain formulas and arranges that staggered certainly or random layout also is feasible in cylindrical shell.
The stretched wire of calcining described in the present invention program one and two is straight line chain or U type chain.
The stretched wire of calcining described in the present invention program one and two is to be formed by a plurality of annulus or elliptical ring or " 8 " word ring set buckle; Certainly the stretched wire of other structure formation also is feasible, but best with " 8 " word ring fastening type stretched wire, its structure can make heat exchange abundant.
The present invention program two is made up of front and back two portions, because the function that front and back two portions are born is different, thereby the internal structure of two portions cylindrical shell is also different.First half divides three sections to be mounted with four kinds of devices in cylindrical shell: first section is equipped with charging guide plate, and aqueous gypsum raw material is imported next stage rapidly; And be provided with one group of suspensive chain type at first section and break up device, oarse-grained material becomes fluffy small-particle in this stage, to increase the specific surface area of gypsum particle, is convenient to the heat absorption evaporation of moisture; Uniform gypsum raw material can save and break up device for feed particles is little; Subordinate phase is equipped with combination material delivering plate device, and gypsum raw material is taken up along with the rotation of cylindrical shell by the combination material delivering plate and left, and the material curtain that formation one is uniformly distributed with in tube can make the sufficient thermal dehydration of gypsum when high-temperature flue gas passes the material curtain; Afterbody is equipped with the charging guide plate of one group of export function, and gypsum raw material is sent into the rear section cylindrical shell.
Be divided into three sections in the cylindrical shell of rear section equally, the fs also is provided with charging guide plate for introduction segment, imports material, and this section charging guide plate can further be sloughed remaining appearance water simultaneously, and powder is spilt to subordinate phase through air-laid; Subordinate phase is provided with curtain formula calcining stretched wire for calcining section, thereby the gypsum raw material of having sloughed appearance water is sloughed a hypocrystalline water through convection current with the mode of conduction heat exchange in this stage and become qualified plaster of Paris powder.
Its principle of work is: the material delivering plate device of the present invention in will the section of calcining changes into after the calcining stretched wire; Material is no longer kicked up, but obtains the heat of flue gas flow by curtain formula calcining stretched wire through the mode of convective heat exchange, imbeds in the bed of material of cylindrical shell bottom gradually along with the rotation of cylindrical shell then; Because this moment, material was loose flow state; Material is very abundant with contacting of chain appearance, can obtain the heat that chain is saved efficiently, accomplishes the heat exchange dehydration with the mode of conduction.The advantage of this device is: one, simple in structure, the volume of rotary kiln reduces, the relative material delivering plate of chain, and manufacturing cost also reduces; Two, after chain is imbedded material, constantly stir, material is had the function of copying, heat exchange efficiency is improved along with the rotation of cylindrical shell; Three,, make the material simultaneously also can be pure and change coating of particles, thereby reach physically modified and improve the purpose of grain composition thereupon powder at incinerating because chain constantly stirs and grind relatively; Four, calcining temperature stable and uniform reduces burning and gives birth to the phenomenon of burning, and guarantees the quality of product.Regulate and the control product quality in order to change according to parameter of materials targetedly; Employing is installed on the outside thermal sensor spare of cylindrical shell and records the temperature in relevant stage; And adopt the detected temperature of charge of online sampling unit and opening for feed place be installed on the cylindrical shell and the variation of moisture, change material in the intravital residence time of tube through adjustment two portions drum speed, with control dehydration and soaking time; Thereby very easily the calcining parameter is adjusted, guaranteed needed quality parameter; Phase III is that material is derived section, utilizes the revolution of cylindrical shell through the charging guide plate of the lifting function of holding concurrently finished product to be exported outside the calcining cylindrical shell.
Demands of different according to material characteristic and product quality index; At the product of long-term production with a kind of quality parameter; The moisture content of raw material and composition fluctuation simultaneously also can unite two into one front and back two portions under the situation of allowed band, and promptly the present invention program one; Then only need a cylindrical shell, a sets of transmission mechanism, this is typical single stage method calcining kiln.At this moment, its internal structure can be divided into four-stage: the fs is provided with charging guide plate, and can increase and break up device, but when the material rarefaction is very good, can saves and break up device; Subordinate phase is that dewatering period is equipped with the built-up type material delivering plate; Phase III is curtain formula calcining stretched wire; Stage is the material delivering plate with guide function, and its form is different and different according to the discharging mode of movement of afterbody.
(Four) description of drawings:
Fig. 1 is the synoptic diagram of structure one of the present invention;
Fig. 2 is the A-A synoptic diagram of Fig. 1;
Fig. 3 is the B-B synoptic diagram of Fig. 1;
Fig. 4 is the synoptic diagram of straight line calcining stretched wire;
Fig. 5 is the partial enlarged view of oval ring calcining stretched wire;
Fig. 6 is the partial enlarged view of distortion figure of eight calcining stretched wire;
Fig. 7 is the synoptic diagram of structure two of the present invention;
Fig. 8 is the synoptic diagram of structure three of the present invention.
Among the figure: the 1-heating duct, the 2-hopper, the 3-charging guide plate, the 4-chain type is broken up device, the 5-material delivering plate; The 6-rotating cylinder, 7-calcines stretched wire, 8-charging guide plate, 9-steel ring, 10-support wheel; The 11-gear ring, the 12-gear, the 13-motor reducer, the 14-elliptical ring, 15-is out of shape " 8 " word ring; The 16-cylindrical shell that dewaters, the 17-cover that is coaxial docking, 18-calcines cylindrical shell, 19-dislocation butt joint cover, 20-material.
The (5) embodiment:
Example 1: structure one of the present invention; Referring to Fig. 1,2,3; It has horizontally-arranged rotating cylinder 6, dispose the bearing and turning driving mechanism (by front and back steel ring 9, support wheel 10, and gear ring 11, gear 12, motor reducer 13 forms), be divided into introduction segment in the cylindrical shell and charging guide plate 3, dewatering period are installed material delivering plate 5, calcining section are installed and derive charging guide plate 8 section is installed; Barrel front end is import (an external heating duct 1 and hopper 2); The rear end is outlet, particularly: be lifted with calcining stretched wire 7 in the calcining section of cylindrical shell along the barrel periphery, and be equipped with at the introduction segment of cylindrical shell and break up device 4 (device of breaing up of present embodiment is a chain structure; Can also be reamer, pulverizing hammer etc.), material 20 is broken up; The stretched wire 7 of calcining described in the present embodiment is many row's curtain formulas and arranges; And calcining stretched wire 7 is straight line chain (referring to Fig. 4) or U type chain (referring to Fig. 3), and said calcining stretched wire 7 is to be formed by connecting elliptical ring 14 (referring to Fig. 5) or distortion " 8 " word ring 15 (referring to Fig. 6) (can also be the annular of annulus and other form) hitch.Can also install grinding elemenies such as steel ball in the calcining stretched wire 7 additional.
Example 2: structure two of the present invention; Referring to Fig. 7; It has dehydration cylindrical shell 16 and disposes bearing and turning drive unit (with routine 1 structure) separately with calcining cylindrical shell 18, two cylindrical shells, is divided into introduction segment in the said dehydration cylindrical shell 16 and charging guide plate 3 is installed and breaks up device 4 (also can save under special circumstances); Dewatering period is equipped with material delivering plate 5, the derivation section is equipped with charging guide plate 8, and barrel front end is import (a butt joint heating duct 1 and hopper 2), and the rear end is for exporting; Be divided into introduction segment in the said calcining cylindrical shell 18 and charging guide plate 3, calcining section be installed and derive section charging guide plate 8 is installed, barrel front end is import, and the rear end is outlet; Particularly: the outlet of said dehydration cylindrical shell 16 adopts the cover 17 that is coaxial docking to dock each other with the import of calcining cylindrical shell 18; And the calcining section at calcining cylindrical shell 18 is lifted with calcining stretched wire 7 along the barrel periphery; The stretched wire 7 of calcining described in the present embodiment is many row's curtain formulas and arranges that said calcining stretched wire 7 be a U type chain, referring to Fig. 3, said calcining stretched wire 7 be by a plurality of elliptical ring 14 referring to Fig. 5, or be out of shape " 8 " word ring 15 and be formed by connecting referring to Fig. 6 hitch.
Example 3: structure three of the present invention; Referring to Fig. 8, its substruction is with example 2, and different is; Save and break up device (also can increase as required and break up device) dehydration cylindrical shell 16 and calcining cylindrical shell 18 dislocation (disalignment) layouts, then both adopt 19 butt joints of dislocation butt joint cover.
Claims (10)
1. highly effective directly-heated gypsum calcination rotary kiln; Has horizontally-arranged rotating cylinder; Dispose the bearing and turning driving mechanism, be divided into introduction segment in the cylindrical shell and charging guide plate, dewatering period are installed material delivering plate, calcining section are installed and derive section charging guide plate is installed, barrel front end is import; The rear end is outlet, and it is characterized in that: the calcining section at cylindrical shell is lifted with the calcining stretched wire along the barrel periphery.
2. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 1 is characterized in that: be equipped with at the introduction segment of cylindrical shell and break up device.
3. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 1 is characterized in that: said calcining stretched wire is many row's curtain formulas and arranges in cylindrical shell.
4. according to claim 1 or 3 described a kind of highly effective directly-heated gypsum calcination rotary kilns, it is characterized in that: said calcining stretched wire is straight line chain or U type chain.
5. according to claim 1 or 3 described a kind of highly effective directly-heated gypsum calcination rotary kilns, it is characterized in that: said calcining stretched wire is to be formed by a plurality of annulus or elliptical ring or " 8 " word ring set buckle.
6. highly effective directly-heated gypsum calcination rotary kiln; Have dehydration cylindrical shell and calcining cylindrical shell; Two cylindrical shells dispose the bearing and turning drive unit separately; Be divided into introduction segment in the said dehydration cylindrical shell and charging guide plate, dewatering period are installed material delivering plate are installed, derive section charging guide plate is installed, barrel front end is import, and the rear end is outlet; Be divided into introduction segment in the said calcining cylindrical shell and charging guide plate, calcining section be installed and derive section charging guide plate is installed, barrel front end is import, and the rear end is outlet; It is characterized in that: the outlet of said dehydration cylindrical shell is docked with the import of calcining cylindrical shell each other; And the calcining section at the calcining cylindrical shell is lifted with the calcining stretched wire along the barrel periphery.
7. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 6 is characterized in that: the introduction segment at the dehydration cylindrical shell is equipped with and breaks up device.
8. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 6 is characterized in that: said calcining stretched wire is many row's curtain formulas and arranges in cylindrical shell.
9. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 6 is characterized in that: said calcining stretched wire is straight line chain or U type chain.
10. a kind of highly effective directly-heated gypsum calcination rotary kiln according to claim 6 is characterized in that: said calcining stretched wire is to be formed by a plurality of annulus or elliptical ring or " 8 " word ring set buckle.
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| CN2011102088066A CN102381848A (en) | 2011-07-25 | 2011-07-25 | Efficient direct-heating gypsum calcination rotary kiln |
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| CN2011102088066A CN102381848A (en) | 2011-07-25 | 2011-07-25 | Efficient direct-heating gypsum calcination rotary kiln |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104230192A (en) * | 2014-09-17 | 2014-12-24 | 黄石燕燃进出口有限公司 | Method and device for producing alpha-type gypsum in large scale with low cost |
| CN105800978A (en) * | 2016-06-08 | 2016-07-27 | 湖南昌迅科技环保股份有限公司 | Rotary alpha gypsum powder crystallization kiln |
| CN110357130A (en) * | 2019-08-07 | 2019-10-22 | 葫芦岛虹京科技有限公司 | A kind of acidizing fired device and its production method improving lithium carbonate conversion ratio |
| CN111533477A (en) * | 2020-05-18 | 2020-08-14 | 郑州三迪建筑科技有限公司 | Phosphogypsum double-cylinder calcining furnace |
| RU2773785C1 (en) * | 2021-10-04 | 2022-06-09 | Акционерное общество "ЕВРАЗ Ванадий Тула" | Rotating furnace chain curtain |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105800978B (en) * | 2016-06-08 | 2017-09-01 | 湖南昌迅科技环保股份有限公司 | A kind of alpha gypsum powder rotates crystallization |
| CN110357130A (en) * | 2019-08-07 | 2019-10-22 | 葫芦岛虹京科技有限公司 | A kind of acidizing fired device and its production method improving lithium carbonate conversion ratio |
| CN111533477A (en) * | 2020-05-18 | 2020-08-14 | 郑州三迪建筑科技有限公司 | Phosphogypsum double-cylinder calcining furnace |
| RU2773785C1 (en) * | 2021-10-04 | 2022-06-09 | Акционерное общество "ЕВРАЗ Ванадий Тула" | Rotating furnace chain curtain |
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Application publication date: 20120321 |