CN102815674A - Heat-exchanging device for kiln-feeding raw material and high-temperature flue gas of roasting rotary kiln for producing acid from gypsum - Google Patents
Heat-exchanging device for kiln-feeding raw material and high-temperature flue gas of roasting rotary kiln for producing acid from gypsum Download PDFInfo
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- CN102815674A CN102815674A CN2011101521572A CN201110152157A CN102815674A CN 102815674 A CN102815674 A CN 102815674A CN 2011101521572 A CN2011101521572 A CN 2011101521572A CN 201110152157 A CN201110152157 A CN 201110152157A CN 102815674 A CN102815674 A CN 102815674A
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- preheater
- heat
- cyclone preheater
- flue gas
- gypsum
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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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- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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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
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a heat-exchanging device for kiln-feeding raw materials and high-temperature flue gas of a roasting rotary kiln for producing acid from gypsum, to solve problems that a flue gas temperature of a rotary kiln system in producing sulfuric acid (with cement as by-product) from gypsum is high and the materials are easy to block. The heat-exchanging device comprises a flat cylinder preheater, a vertical cylinder preheater, a four-stage cyclone preheater, a four-stage heat-exchanging air pipe, a three-stage cyclone preheater, a three-stage heat-exchanging air pipe and a two-stage cyclone preheater, wherein the flat cylinder preheater is connected with the vertical cylinder preheater, the vertical cylinder preheater is connected with the four-stage cyclone preheater, the four-stage cyclone preheater is connected with the three-stage cyclone preheater through the four-stage heat-exchanging air pipe, and the three-stage cyclone preheater is connected with the two-stage cyclone preheater through the three-stage heat-exchanging air pipe. The heat-exchanging device has double functions of energy conservation via heat-exchanging and dust exhaust, has the characteristics of strong heat-exchanging capability, good dust-exhausting capability and no material blockage, and is a preferred energy-saving and environment-friendly device of the roasting rotary kiln system for producing acid from gypsum.
Description
Technical field
The invention belongs to the energy-saving and environmental protection field, particularly a kind of gypsum relieving haperacidity calcination rotary kiln high-temperature flue gas heat exchange is lowered the temperature and is gone into the device that the heat exchange of kiln raw material heats up.
Background technology
At present, the many Wingdale production cement clinker kilns that directly adopt of gypsum relieving haperacidity calcination rotary kiln decompose outward and preheating cement produced with the dry method technology both at home and abroad, have following defective:
The first, because the gypsum fusing point is lower, in pre-heating system, be easy to generate serious technology accidents such as stammerer, obstruction, cause a lot of production lines to be difficult to normal operation;
The second, the proportion of gypsum is lighter, in preheater, is difficult for deposition, in pre-heating system, is not easy to realize heat exchange, has increased pre-heating system material cycling rate.
Summary of the invention
The purpose of this invention is to provide a kind of gypsum relieving haperacidity calcination rotary kiln and advance kiln raw material and high-temperature flue gas heat-exchanger rig, high to solve gypsum system sulfuric acid by-product cement calcination rotary kiln system flue-gas temperature, the problem of material easy blocking.
The present invention includes flat cylinder pre-heating, shaft preheater, Category Four cyclone preheater, level Four heat exchange airduct, three grades of cyclone preheaters, three grades of heat exchange airducts, secondary cyclone preheater; Flat cylinder pre-heating links to each other with shaft preheater; Shaft preheater links to each other with the Category Four cyclone preheater; The Category Four cyclone preheater links to each other with three grades of cyclone preheaters through level Four heat exchange airduct, and three grades of cyclone preheaters link to each other with the secondary cyclone preheater through three grades of heat exchange airducts.
For better dedusting, the secondary cyclone preheater links to each other with one-level whirlwind preheating fly-ash separator through connecting tube.Said one-level whirlwind preheating fly-ash separator is preferably two.
The high temperature kiln exit gas that rotary kiln came out during the present invention used gets into flat cylinder pre-heating, shaft preheater, Category Four cyclone preheater, level Four heat exchange airduct, three grades of cyclone preheaters, three grades of heat exchange airducts, secondary cyclone preheater, connecting tube, one-level whirlwind preheating fly-ash separator successively, and temperature is progressively reduced to 260 ℃～330 ℃ discharges from 800 ℃～900 ℃.And the material temperature of advancing kiln is promoted to 800 ℃～900 ℃, reaches UTILIZATION OF VESIDUAL HEAT IN, purpose of energy saving.
The present invention has the energy-conservation and dedusting dual-use function of heat exchange, and exchange capability of heat is strong, and dust collection capacity is strong, and the nonclogging characteristics of material are the first-selected energy-saving environmental protection devices of gypsum relieving haperacidity calcination rotary kiln system.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Following embodiment can further specify the present invention, but does not limit the present invention in any way.
The present invention includes flat cylinder pre-heating 1, shaft preheater 2, Category Four cyclone preheater 3, level Four heat exchange airduct 4, three grades of cyclone preheaters 5, three grades of heat exchange airducts 6, secondary cyclone preheater 7; Flat cylinder pre-heating 1 links to each other with shaft preheater 2; Shaft preheater 2 links to each other with Category Four cyclone preheater 3; Category Four cyclone preheater 3 links to each other with three grades of cyclone preheaters 5 through level Four heat exchange airduct 4, and three grades of cyclone preheaters 5 link to each other with secondary cyclone preheater 7 through three grades of heat exchange airducts 6.
For better dedusting, secondary cyclone preheater 7 links to each other with one-level whirlwind preheating fly-ash separator 9 through connecting tube 8.
One-level whirlwind preheating fly-ash separator 9 is two in the embodiment of the present invention.
In the use; Flue gas trend is as follows: the high temperature kiln exit gas that rotary kiln comes out gets into flat cylinder pre-heating 1, shaft preheater 2, Category Four cyclone preheater 3, level Four heat exchange airduct 4, three grades of cyclone preheaters 5, three grades of heat exchange airducts 6, secondary cyclone preheater 7, connecting tube 8, one-level whirlwind preheating fly-ash separator 9 successively, and temperature is progressively reduced to 260 ℃～330 ℃ discharges from 800 ℃～900 ℃.
In the use, material moves towards as follows: advance the kiln material and directly get into from three grades of heat exchange airducts 6, in three grades of heat exchange airducts, 6 pipes, broken up up flue gas stream and material heat exchange by the scattering plate special part.Material gets into secondary cyclone preheater 7 with air-flow, because the whirlwind centrifugation realizes separating, flue gas gets into one-level whirlwind preheating fly-ash separator 9, further dedusting collection material through connecting tube 8 to material with flue gas in secondary cyclone preheater 7.The material that 9 dedustings of one-level whirlwind preheating fly-ash separator are collected gets into three grades of heat exchange airducts 6 through one-level whirlwind preheating fly-ash separator 9 tremie pipes, if this circulation.Discharged from one-level whirlwind preheating fly-ash separator 9 by the flue gas after effective dedusting, get into subsequent processing.The material that goes out from secondary cyclone preheater 7 interior cyclone centrifugal separation gets into level Four heat transfer tube 4 through secondary cyclone preheater 7 tremie pipes, in level Four heat transfer tube 4, is broken up up flue gas stream and material heat exchange by the scattering plate special part.Material gets into three grades of cyclone preheaters 5 with air-flow; Material and flue gas in three grades of cyclone preheaters 5 since the whirlwind centrifugation realize separating; Flue gas gets into three grades of heat exchange airducts 6; Material gets into shaft preheater 2 by three grades of cyclone preheater 5 tremie pipes, is broken up up flue gas stream and material heat exchange by scattering plate special part in the shaft preheater.Material gets into Category Four cyclone preheater 3 with air-flow, because the whirlwind centrifugation realizes separating, flue gas gets into level Four heat exchange airduct 4 to material with flue gas in Category Four cyclone preheater 3; Material gets into flat cylinder pre-heating 1 by Category Four cyclone preheater 3 tremie pipes; Flat cylinder pre-heating 1 directly is connected with rotary kiln, has just been got into rotary kiln by the material of preheating, and making into, the material temperature of kiln is promoted to 800 ℃～900 ℃; Reach UTILIZATION OF VESIDUAL HEAT IN, purpose of energy saving.
In order to verify effect of the present invention, lot of test has been done by the application unit, 50,000 tons of supporting apparatus of the present invention of having used of gypsum relieving haperacidity project φ 3 * 48m calcination rotary kiln, selects the part-time production run parameter 1-4 that sees attached list.Can find out that through the temperature data in the subordinate list this device has reached conscientiously reduces to 260 ℃～330 ℃ discharges with 800 ℃～900 ℃ rotary kiln high-temperature flue gas, and make into that the kiln temperature of charge has risen to 800 ℃～900 ℃ energy-conservation purpose.Apparatus of the present invention run well continuously, inner nothing stammerer latch up phenomenon.
Claims (3)
1. a gypsum relieving haperacidity calcination rotary kiln advances kiln raw material and high-temperature flue gas heat-exchanger rig; It is characterized in that: it comprises flat cylinder pre-heating (1), shaft preheater (2), Category Four cyclone preheater (3), level Four heat exchange airduct (4), three grades of cyclone preheaters (5), three grades of heat exchange airducts (6), secondary cyclone preheater (7); Flat cylinder pre-heating (1) links to each other with shaft preheater (2); Shaft preheater (2) links to each other with Category Four cyclone preheater (3); Category Four cyclone preheater (3) links to each other with three grades of cyclone preheaters (5) through level Four heat exchange airduct (4), and three grades of cyclone preheaters (5) link to each other with secondary cyclone preheater (7) through three grades of heat exchange airducts (6).
2. gypsum relieving haperacidity calcination rotary kiln according to claim 1 advances kiln raw material and high-temperature flue gas heat-exchanger rig, it is characterized in that: said secondary cyclone preheater (7) links to each other with one-level whirlwind preheating fly-ash separator (9) through connecting tube (8).
3. gypsum relieving haperacidity calcination rotary kiln according to claim 2 advances kiln raw material and high-temperature flue gas heat-exchanger rig, it is characterized in that: said one-level whirlwind preheating fly-ash separator (9) is two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101521572A CN102815674A (en) | 2011-06-08 | 2011-06-08 | Heat-exchanging device for kiln-feeding raw material and high-temperature flue gas of roasting rotary kiln for producing acid from gypsum |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101521572A CN102815674A (en) | 2011-06-08 | 2011-06-08 | Heat-exchanging device for kiln-feeding raw material and high-temperature flue gas of roasting rotary kiln for producing acid from gypsum |
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| CN102815674A true CN102815674A (en) | 2012-12-12 |
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| CN2011101521572A Pending CN102815674A (en) | 2011-06-08 | 2011-06-08 | Heat-exchanging device for kiln-feeding raw material and high-temperature flue gas of roasting rotary kiln for producing acid from gypsum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979501A (en) * | 2014-06-11 | 2014-08-13 | 南京凯盛国际工程有限公司 | Heat exchanger for making acid from gypsum |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040098U (en) * | 1988-10-12 | 1989-06-28 | 朝阳重型机器厂 | Whirlwind oblate-tube preheater with high efficiency |
| CN1079818A (en) * | 1992-06-09 | 1993-12-22 | 北京特种水泥厂 | Improvement of cement rotary kiln vertical cylinder preheater |
| US20050274067A1 (en) * | 2004-06-14 | 2005-12-15 | Morton Edward L | Method and apparatus for drying wet bio-solids using excess heat from a cement clinker cooler |
| CN101844879A (en) * | 2010-02-04 | 2010-09-29 | 南京创能电力科技开发有限公司 | Device for producing sulfuric acid and cement by decomposing and calcining gypsum |
| CN101844748A (en) * | 2010-05-18 | 2010-09-29 | 云南创兴建材新技术有限公司 | Method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and decomposing furnace |
| CN202080890U (en) * | 2011-06-08 | 2011-12-21 | 甘肃锦世化工有限责任公司 | Kiln-feeding raw material and high-temperature flue gas heat-exchanging device for acid-production-from-gypsum rotary roasting kiln |
-
2011
- 2011-06-08 CN CN2011101521572A patent/CN102815674A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2040098U (en) * | 1988-10-12 | 1989-06-28 | 朝阳重型机器厂 | Whirlwind oblate-tube preheater with high efficiency |
| CN1079818A (en) * | 1992-06-09 | 1993-12-22 | 北京特种水泥厂 | Improvement of cement rotary kiln vertical cylinder preheater |
| US20050274067A1 (en) * | 2004-06-14 | 2005-12-15 | Morton Edward L | Method and apparatus for drying wet bio-solids using excess heat from a cement clinker cooler |
| CN101844879A (en) * | 2010-02-04 | 2010-09-29 | 南京创能电力科技开发有限公司 | Device for producing sulfuric acid and cement by decomposing and calcining gypsum |
| CN101844748A (en) * | 2010-05-18 | 2010-09-29 | 云南创兴建材新技术有限公司 | Method for preparing high-concentration SO2 flue gas and active CaO by using phosphogypsum and decomposing furnace |
| CN202080890U (en) * | 2011-06-08 | 2011-12-21 | 甘肃锦世化工有限责任公司 | Kiln-feeding raw material and high-temperature flue gas heat-exchanging device for acid-production-from-gypsum rotary roasting kiln |
Non-Patent Citations (1)
| Title |
|---|
| 薛勇: "《离心捕集原理与设备》", 31 May 2011, article "旋风预热器的组成与换热原理", pages: 164 - 10.2.1 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103979501A (en) * | 2014-06-11 | 2014-08-13 | 南京凯盛国际工程有限公司 | Heat exchanger for making acid from gypsum |
| CN103979501B (en) * | 2014-06-11 | 2016-08-24 | 南京凯盛国际工程有限公司 | A kind of gypsum relieving haperacidity heat-exchanger rig |
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Application publication date: 20121212 |