CN201288148Y - Novel multifuel combustion kiln - Google Patents
Novel multifuel combustion kiln Download PDFInfo
- Publication number
- CN201288148Y CN201288148Y CNU200820176090XU CN200820176090U CN201288148Y CN 201288148 Y CN201288148 Y CN 201288148Y CN U200820176090X U CNU200820176090X U CN U200820176090XU CN 200820176090 U CN200820176090 U CN 200820176090U CN 201288148 Y CN201288148 Y CN 201288148Y
- Authority
- CN
- China
- Prior art keywords
- flue gas
- kiln body
- coil
- product
- kiln
- 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.)
- Expired - Fee Related
Links
Landscapes
- Furnace Details (AREA)
Abstract
The utility model relates to a new mixed-combustion furnace which comprises a furnace body, and has the characteristic that a flue gas coil and an auxiliary heat exchange sheet are arranged in the furnace body. The mixed-combustion furnace is a direct and counter flow combination single-stage mixed-calcination facility of integrating continuous high-temperature fast drying, mild coil calcination and material cooling designed to aim at the characteristics of complicated composition, fine particles, large amount of adherent water and high calcium sulfate content of industrial by-product gypsum. The new mixed-combustion furnace back sends flue gas to a gas circulation passage and an auxiliary heat exchange sheet both arranged at the front of the furnace body through the flue gas coil for heat medium (flue gas) arranged in the furnace body in order to implement sufficient heat exchange between material and the heat medium, thereby increasing heat efficiency, reducing heat consumption of product, increasing yield of product, and producing varieties of high-quality gypsum powder.
Description
Technical field
The utility model belongs to the material of construction technical field of processing equipment, particularly relates to a kind of novel multifuel combustion kiln.
Background technology
Fast development along with China's industry, annual industrial solid castoff of discharging is (as flue gas desulfurization gypsum, phosphogypsum, claim industry by-product gypsum again) increase sharply, according to the annual phosphogypsum that produces of ASSOCIATE STATISTICS China more than 3,000 ten thousand tons, desulfurated plaster will be more than 2,000 ten thousand tons, pile up like a mountain for these by-product gypsums, and major part is not utilized, serious environment pollution.
At present, the treatment process of industry by-product gypsum mainly contains three kinds of methods: the stacking of 1, enclosing the land; 2, directly utilize the making cement retardant; 3, as the raw material of gypsum by-product production of articles.Wherein as gypsum by-product production of articles raw material mainly be with by-product gypsum directly or through after handling (prebake, washing etc.), adopt the traditional production technique and the device fabrication terra alba of the plaster of paris.
The method that traditional continous way is produced terra alba has two kinds: a kind of is outer burning method, this method mainly is with prebake or is crushed to the gypsum raw material inserting apparatus of certain particle size, thermal source heats at the equipment outer wall, by the equipment outer wall heat is passed to gypsum, thereby finishes calcining method.The general gypsum filling ratio of this calcination process is low, heat exchange angle little (less than 45 degree), so hear rate is very high.Another kind is interior burning method, be exactly that material directly contacts with thermal medium and carries out heat exchange, this method generally is with one of the mode of gypsum and flue gas equidirectional (following current) or opposite direction (adverse current) inserting apparatus, and gypsum is finished heat exchange calcining by directly contacting with flue gas in operational process.This method is as adopting rotary calcining, because the material filling ratio is low, the heat exchange angle is little, and heat exchange efficiency is low, and as adopting fluidizing calcination, material must add prebaking technique; And this method is directly mixed impurity such as contained coal ash in the flue gas with gypsum product, influence quality product.
Industry by-product gypsum is owing to contain a large amount of attached waters, complicated component, tiny, the sulfate dihydrate calcium contents height of particle, directly adopt above-mentioned traditional method of producing terra alba, the waste resource, can only produce low-grade plaster of Paris product, production process thermo-efficiency is low, energy consumption is high, yield poorly, environmental protection is poor, thereby has caused the application of industry by-product gypsum to be subjected to severely restricts.
Summary of the invention
The purpose of this utility model is to overcome the defective of above-mentioned prior art, provides a kind of and can effectively improve thermo-efficiency, reduces the hear rate of product, improves product percent of pass, can produce the multifuel combustion kiln of many kinds high quality terra alba.
The technical solution of the utility model is as follows:
A kind of novel multifuel combustion kiln comprises the kiln body, it is characterized in that: be provided with flue gas coil and auxiliary heat exchanger fin in the described kiln body;
Above-mentioned flue gas coil and auxiliary heat exchanger fin are located at kiln body stage casing, and flue gas coil two ends are communicated with high-temperature flue gas Heat Room that is located at kiln body front end and the back flue gas mixing-chamber that is located at kiln body end respectively; Also be provided with preceding flue gas mixing-chamber at kiln body front end, this preceding flue gas mixing-chamber is communicated with preceding flue gas mixing-chamber by being located at the intravital flue gas recirculation pipeline of kiln;
The front end of described kiln body also is equipped with the material puopulsion unit;
Be provided with the high-efficiency guide heat exchanger fin in the above-mentioned kiln body that high-temperature flue gas Heat Room place is set.
Multifuel combustion kiln of the present utility model be the complicated component, the particle that have at industry by-product gypsum tiny, contain characteristic such as higher attached water, sulfate dihydrate calcium contents height and design a kind ofly collect the single stage method mixed calcining equipment that concurrent-countercurrent that the flash baking of continous way high temperature, the calcining of gentle coil, material is cooled to one combines.This equipment by be arranged on the intravital coil that feeds thermal medium (flue gas) of kiln, with flue gas recirculation pipeline and the auxiliary heat exchanger fin of smoke backflow to kiln body front end, make material and thermal medium carry out sufficient heat exchange, thereby improved thermo-efficiency, reduced the hear rate of product, improve product percent of pass, can produce many kinds, high-quality terra alba.Calcining kiln of the present utility model is wide to adaptability to raw material, can adapt to all industry by-product gypsums of 0～25% water ratio; Fuel tolerance is wide, can adapt to coal, oil, Sweet natural gas or any 300～900 ℃ high-temperature flue gas; Material heat exchange efficiency height, the participation heat exchange position of adopting aniseed, thermo-contact and kiln body direction 180 degree of unique pipe embedded typ 360 degree; Impurity enters product in the may command flue gas, improves the quality of product; Can realize multiple gypsum product of a kind of device fabrication such as building gypsum plaster, ceramic die terra alba.
Description of drawings
Fig. 1 is the structural representation of the utility model multifuel combustion kiln.
Embodiment
Multifuel combustion kiln of the present utility model comprises kiln body 1, and this kiln body 1 is divided into hyperthermia drying section A, gentle calcining section B and material cooling section C according to the material direction of propulsion.
This kiln body 1 is to be supported by strut member 12, and by transmission rig 13 driven rotary.The front end of kiln body 1 (hyperthermia drying section A) is equipped with preceding flue gas mixing-chamber 3, feed-pipe 9 and high-temperature flue gas Heat Room 6, and preceding flue gas mixing-chamber 3 is provided with flue gas discharge opening 9, and the end of kiln body 1 (material cooling section C) is equipped with discharge port 11 and back flue gas mixing-chamber 5.Flue gas mixing-chamber 7 and back flue gas mixing-chamber 5 are communicated with by the flue gas recirculation pipeline 3 that is located in the kiln body 1 before above-mentioned.(gentle calcining section B) also is equipped with heat exchange coil 2 in the kiln body 1, and these coil 2 two ends are communicated with preceding flue gas mixing-chamber 5 and high-temperature flue gas Heat Room 6 respectively.And auxiliary heat exchanger fin 4 and high-efficiency heat conduction heat exchanger fin 14 (being installed in the kiln body corresponding to high-temperature flue gas Heat Room 6 places) are equipped with in kiln body 1 inside, and the leading section of kiln body 1 is equipped with material puopulsion unit 10.
During use, with by-product gypsum (attached water 0～25%) according to certain delivery rate, send into the spout 8 of multifuel combustion kiln uniformly, material enters calcining kiln and contacts with flue gas recirculation pipe 3, carry out the part preheating, be pushed into high temperature flash baking section A fast by material puopulsion unit 10 and carry out flash baking, material after the oven dry enters the gentleness calcining section B by coil 2 and flue gas recirculation pipeline 3 common heating and calcinings, wrap up in down holding under the arm of auxiliary heat exchanger fin 4, material is embedded in coil 2 and flue gas recirculation pipeline 3 in the bed of material and rotates heat exchange together, material breaks away from coil 2 and flue gas recirculation pipeline 3 gradually to the 180 degree directions, material begins whereabouts and mixing back cycle heat exchange and travels forward, pass through the effect of the equipment gradient and the fluidization effect of material thickness during to back flue gas mixing-chamber 5, the semi-hydrated gypsum that calcining is finished flow to material cooling section C, after the cooling of cooling section, go out calcining kiln to discharge port 11 to material.
The high-temperature flue gas of fuel combustion enters high-temperature flue gas Heat Room 6, with access arrangement the hygrometric state by-product gypsum carry out quick heat exchange by high-efficiency guide heat exchanger fin 14, the flue gas that temperature descends after heat exchange enters coil 2, and by assisting heat exchanger fin 4 and coil 2 that heat is changed to the material that is wrapped in coil, the low temperature of realizing material is evenly calcined (gentle calcining), the flue gas of finishing a large amount of heat exchange enters back flue gas mixing-chamber 5, is discharged by venting port 9 by flue gas recirculation pipeline 3 reverse extremely preceding flue gas mixing-chambers 7 backs.Material changes half water or III type gypsum phase grog through the calcining back into by two water gypsum, during the course by control smoke inlet temperature and flow of flue gas speed, reach the ratio of control half water or III type, thus the terra alba of production different varieties such as building gypsum plaster or ceramic die terra alba.
Claims (4)
1, a kind of novel multifuel combustion kiln comprises kiln body (1), it is characterized in that: be provided with flue gas coil (2) and auxiliary heat exchanger fin (4) in the described kiln body (1).
2, according to the described multifuel combustion kiln of claim 1, it is characterized in that: above-mentioned flue gas coil (2) and auxiliary heat exchanger fin (4) are located at kiln body (1) stage casing, and flue gas coil (2) two ends are respectively with the high-temperature flue gas Heat Room (6) that is located at kiln body (1) front end be located at the terminal back flue gas mixing-chamber (5) of kiln body (1) and be communicated with; Also be provided with preceding flue gas mixing-chamber (7) at kiln body (1) front end, this preceding flue gas mixing-chamber (7) is communicated with preceding flue gas mixing-chamber (5) by the flue gas recirculation pipeline (3) that is located in the kiln body (1).
3, according to claim 1 or 2 described multifuel combustion kilns, it is characterized in that: the front end of described kiln body (1) also is equipped with material puopulsion unit (10).
4, according to the described multifuel combustion kiln of claim 2, it is characterized in that: the above-mentioned setting in the kiln body (1) that high-temperature flue gas Heat Room (6) locates is provided with high-efficiency guide heat exchanger fin (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820176090XU CN201288148Y (en) | 2008-10-22 | 2008-10-22 | Novel multifuel combustion kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820176090XU CN201288148Y (en) | 2008-10-22 | 2008-10-22 | Novel multifuel combustion kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201288148Y true CN201288148Y (en) | 2009-08-12 |
Family
ID=40979826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820176090XU Expired - Fee Related CN201288148Y (en) | 2008-10-22 | 2008-10-22 | Novel multifuel combustion kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201288148Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130229A (en) * | 2015-07-07 | 2015-12-09 | 湖南昌迅科技环保股份有限公司 | Beta gypsum calcining kiln |
| CN106247810A (en) * | 2016-08-01 | 2016-12-21 | 宁波大学 | A kind of smoke backflow Dual-barrel rotary kiln |
| CN107986311A (en) * | 2017-12-08 | 2018-05-04 | 重庆庆龙新材料科技有限公司 | A kind of strontium carbonate high-temperature calcination equipment |
-
2008
- 2008-10-22 CN CNU200820176090XU patent/CN201288148Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105130229A (en) * | 2015-07-07 | 2015-12-09 | 湖南昌迅科技环保股份有限公司 | Beta gypsum calcining kiln |
| CN105130229B (en) * | 2015-07-07 | 2017-07-11 | 湖南昌迅科技环保股份有限公司 | A kind of β gyp-incineration, kilns |
| CN106247810A (en) * | 2016-08-01 | 2016-12-21 | 宁波大学 | A kind of smoke backflow Dual-barrel rotary kiln |
| CN106247810B (en) * | 2016-08-01 | 2018-05-11 | 宁波大学 | A kind of smoke backflow Dual-barrel rotary kiln |
| CN107986311A (en) * | 2017-12-08 | 2018-05-04 | 重庆庆龙新材料科技有限公司 | A kind of strontium carbonate high-temperature calcination equipment |
| CN107986311B (en) * | 2017-12-08 | 2023-11-24 | 重庆庆龙新材料科技有限公司 | Strontium carbonate high temperature calcination equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102875036B (en) | Heat storage type lime rotary kiln | |
| CN101348341A (en) | Manufacturing method for producing construction gypsum from boiler tail gas | |
| CN102001837A (en) | Method and device for calcining materials by using low calorific value fuel | |
| CN201288148Y (en) | Novel multifuel combustion kiln | |
| CN104003633B (en) | Preparation method of silicate clinker and cement and rotary kiln for preparing silicate clinker | |
| CN103241717B (en) | Drying and calcining process and device for coproduction of sulfuric acid and cement from gypsum | |
| CN203007146U (en) | Beam type heat accumulation lime kiln | |
| CN105152141B (en) | A kind of gypsum relieving haperacidity thermal technology and device | |
| CN103819106A (en) | Plasterboard integrated hot-blast stove central heating system | |
| CN203782044U (en) | System for drying and decomposing wet carbide slag as calcium raw material to sinter cement clinker | |
| CN212476557U (en) | Device for preparing magnesium phosphate cement by using medium-burned magnesium oxide | |
| CN105693115A (en) | Calcium oxide efficient calcining furnace | |
| CN105384363B (en) | A kind of application process of Active Lime Rotary Kiln | |
| CN203212332U (en) | Drying and calcining device for sulfuric acid and cement production from gypsum | |
| CN100473622C (en) | Novel calcination technique for gypsum | |
| CN201155919Y (en) | Cement rotary kiln using coal gas as fuel | |
| CN209602391U (en) | A kind of preheater kiln technology prepares the device of pure calcium aluminate cement | |
| CN203474654U (en) | Heat storage type rotary kiln | |
| CN215102891U (en) | Waste heat recycling system for II type anhydrous gypsum powder production line | |
| CN102351442B (en) | Method for material calcination and limekiln device | |
| CN205023854U (en) | Gypsum relieving haperacidity thermal technology device | |
| CN109970370B (en) | Device for preparing pure calcium aluminate cement by preheater kiln technology and production process | |
| CN104002371B (en) | A kind of production technology utilizing limekiln using waste heat from tail gas coproduction air-entrained concrete building block | |
| CN203295370U (en) | Desulfurized gypsum calcining device | |
| CN205953844U (en) | Utilize industrial furnace of likepowder limestone calcination lime |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090812 Termination date: 20151022 |
|
| EXPY | Termination of patent right or utility model |