CN111637431A - Waste heat boiler for recycling smoke heat of rotary hearth furnace - Google Patents
Waste heat boiler for recycling smoke heat of rotary hearth furnace Download PDFInfo
- Publication number
- CN111637431A CN111637431A CN202010505760.3A CN202010505760A CN111637431A CN 111637431 A CN111637431 A CN 111637431A CN 202010505760 A CN202010505760 A CN 202010505760A CN 111637431 A CN111637431 A CN 111637431A
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- CN
- China
- Prior art keywords
- flue gas
- waste heat
- rotary hearth
- hearth furnace
- heat boiler
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G7/00—Steam superheaters characterised by location, arrangement, or disposition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention belongs to the field of rotary hearth furnace flue gas waste heat recovery, and relates to a waste heat boiler for recovering heat of rotary hearth furnace flue gas, which comprises a body, a first slag condensing tube bundle arranged at one end of the body, a plurality of second slag condensing tube bundles arranged along the moving direction of the flue gas in the body and used for performing countercurrent heat exchange with the flue gas, and a superheater, an evaporator and an economizer arranged along the moving direction of the flue gas in the body. By means of arranging the two-stage slag condensing tube bundle, the multi-stage superheater, the combined ash removal structure and the like, the accumulated ash and corrosion of the waste heat boiler are reduced and even avoided, the operation rate of the waste heat boiler is improved, the service life of the waste heat boiler is prolonged, and the production cost is reduced.
Description
Technical Field
The invention belongs to the field of rotary hearth furnace flue gas waste heat recovery, and relates to a waste heat boiler for recovering heat of rotary hearth furnace flue gas.
Background
As a process means for treating the solid wastes of iron and steel enterprises, the rotary hearth furnace technology develops rapidly in China in recent years. In order to recover the heat of the flue gas generated by the rotary hearth furnace, a waste heat boiler is arranged behind the rotary hearth furnace. The exhaust-heat boiler on the one hand produces steam for production and life use, on the other hand can reduce the flue gas temperature to follow-up dust removal and collection zinc powder to the flue gas. The components of the raw materials entering the rotary hearth furnace are complex and unstable, and the raw materials comprise dust, dust mud, dust and the like in various process links such as iron making, steel making and the like, so the components of the flue gas generated in the production process of the rotary hearth furnace are also complex.
In general, rotary hearth furnace fumes exhibit strong adhesion and corrosiveness. The caking property is that the smoke contains low-melting-point substances, so that the smoke is easy to attach to the heating surface of the waste heat boiler to form accumulated dust. The dust deposition will lead to the reduction of the heat exchange efficiency of the waste heat boiler, the reduction of the steam yield and the increase of the exhaust gas temperature. When the dust is seriously accumulated, the normal production of the waste heat boiler and even the rotary hearth furnace can be influenced. The corrosiveness is caused by the fact that the smoke contains chloride, such as NaCl, KCl, ZnCl and other corrosive salts. All parts in the waste heat boiler, such as a heating surface tube bundle, a rapping bar, a tube bundle hanger and the like, which are in contact with high-temperature flue gas are corroded. For the heated surface tube bundle, the higher the temperature of the medium in the tube, the higher the corrosion speed; for structural members such as a rapping rod, a tube bundle hanger and the like, the higher the flue gas temperature is, the higher the corrosion speed is. After the heating surface tube bundle is corroded, accidents such as leakage and tube explosion can be caused, the heating surface tube bundle needs to be replaced, and the production cost is increased. After the structural part corrodes, also need change, influence production, reduce the operating rate. From the condition of the rotary hearth furnace which is operated at home at present, the heating surface needs to be replaced every half year to one year due to corrosion.
Disclosure of Invention
In view of the above, the present invention provides a waste heat boiler for recovering flue gas heat of a rotary hearth furnace, which prevents ash deposition and corrosion, so as to reduce or even avoid ash deposition and corrosion of the waste heat boiler, improve the operation rate of the waste heat boiler, prolong the service life of the waste heat boiler, and reduce the production cost.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a waste heat boiler for retrieving rotary hearth furnace flue gas heat, includes the body, sets up the first slag condensation tube bank in its one end, along this internal flue gas direction of motion arrange be used for with the flue gas carry out a plurality of second slag condensation tube banks of heat transfer against current and follow this internal flue gas direction of motion arrange over heater, evaporimeter, economizer.
Optionally, the superheater is sequentially provided with a low-temperature superheater and a high-temperature superheater which are arranged in series along the movement direction of the flue gas in the body.
Optionally, two high-temperature superheaters are provided, and are a first high-temperature superheater and a second high-temperature superheater which are respectively connected in series with the low-temperature superheater.
Optionally, a desuperheater is arranged between the high-temperature superheater and the low-temperature superheater.
Optionally, the economizer is formed by connecting a first economizer and a second economizer in series.
Optionally, the flue gas dust collector further comprises a shock wave soot blower mounted at the top of the body and arranged in a matched manner with the second slag coagulation tube bundle, and the soot blower is symmetrically arranged along a direction perpendicular to the movement direction of flue gas in the body.
Optionally, the vibration exciter further comprises elastic rappers arranged on the side face of the body, and cooling type rapping rods are connected between the elastic rappers which are symmetrically arranged.
Optionally, the device further comprises a bin wall rapper installed on the body.
Optionally, the bottom of the body is provided with an ash bucket along the length direction thereof.
Optionally, a furnace platform and/or a manhole are arranged between the adjacent second slag condenser tube bundles.
The invention has the beneficial effects that:
(1) the invention adopts a first slag condenser tube bundle and a second slag condenser tube bundle, wherein the first slag condenser tube bundle is formed by film-type wall dilution, and the second slag condenser tube bundle is used as a convection tube bundle (evaporator). The two-stage slag condensation tube bundle is favorable for removing most dust in the flue gas and lightening the dust deposition of the tube bundle at the back.
(2) The invention is provided with a first-stage low-temperature superheater and a second-stage high-temperature superheater, wherein the third-stage superheater adopts a series mode for countercurrent heat exchange, and a desuperheater is arranged between the low-temperature superheater and the high-temperature superheater. This is done for three reasons: after the superheater is classified, each stage is small in size, light in weight and convenient to replace; secondly, a desuperheater is arranged between stages, so that the steam temperature is prevented from being too high, and the corrosion is reduced; and thirdly, countercurrent heat exchange is beneficial to reducing the temperature of the pipe wall and lightening corrosion.
(3) The invention adopts the shock wave soot blower, the elastic vibrator and the bin wall vibrator to carry out combined type soot cleaning, the film type wall has less soot deposition and is easy to clean, and the bin wall vibrator is adopted; the convection bank has more dust deposition and is difficult to clean, and a shock wave soot blower is adopted in the vertical direction, namely the axial direction of the bank; the horizontal width direction, i.e. the radial direction of the tube bundle, is adopted with an elastic rapping device. The ash removal process comprises the following steps: the bin wall vibrator and the elastic vibrator act first to vibrate and loosen the deposited ash, and then the gas pulse soot blower acts to flush the lump and loose deposited ash.
(4) The invention adopts the cooling type rapping bar, reduces the temperature of the rapping bar and avoids the rapping bar from being corroded.
(5) The tube bundle hanging structure is externally arranged, namely, the tube bundle hanging structure is arranged outside the boiler and is not contacted with the flue gas, so that the tube bundle hanging structure is prevented from being corroded by the flue gas.
(6) The manhole of the invention is large. And a pair of manholes (which are bilaterally symmetrical in the width direction of the boiler) are arranged between every two groups of tube bundles and on the ash buckets below the tube bundles. The boiler dust deposition and corrosion conditions can be observed conveniently, and the ash can be removed manually.
(7) The invention arranges a platform between every two groups of tube bundles and below the manhole along the width direction of the boiler, and the platform is hung on the tube bundles at two sides and is movably connected. The boiler dust deposition and corrosion conditions can be conveniently observed, and manual ash removal can be carried out by utilizing the platform.
(8) The through long ash bucket is arranged along the length direction of the boiler, so that ash falling from the tube bundle and accumulated ash blocking of the ash bucket can be avoided.
(9) The denitration spray gun is arranged, so that the concentration of NOx discharged by smoke is reduced, and the environmental protection requirement is met.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic view of the hanging position of the tube bundle.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1-3, the reference numbers in the figures refer to the following elements: the device comprises a body 1, a first slag coagulation tube bundle 2, a second slag coagulation tube bundle 3, a low-temperature superheater 4.1, a first high-temperature superheater 4.2, a second high-temperature superheater 4.3, an evaporator 5, a first economizer 6.1, a second economizer 6.2, a desuperheater 7, a shock wave soot blower 8, an elastic rapping device 9, a bin wall rapping device 10, a furnace platform 11, a cooling type rapping rod 12, a dust hopper 13, a manhole 14 and a denitration spray gun 15.
The boiler adopts a horizontal type, direct smoke and integral suspension structure and comprises a body 1, a heating surface tube bundle, an ash removal accessory and the like. The body 1 is composed of various steel structures and is used for supporting the whole waste heat boiler. The heating surface tube bundle consists of the following parts: the slag condenser comprises slag condensing tube bundles (a first slag condensing tube bundle 2 and a second slag condensing tube bundle 3), a superheater, an evaporator 5 and an economizer in sequence (along the flow direction of flue gas). Wherein, the condensed slag tube bundle is used for collecting and removing most of dust in the flue gas, and a plurality of groups are arranged for obvious dust cleaning effect; the superheater is used for heating saturated steam, and downstream heat exchange is adopted for reducing the temperature difference between the flue gas and the medium in the pipe. In order to facilitate maintenance and accurately control the temperature of steam at the outlet of the waste heat boiler, a plurality of groups of desuperheaters 7 are arranged in the middle; the economizer is used for absorbing the waste heat of the flue gas to heat the feed water of the boiler, reducing the temperature of the exhaust gas and improving the heat efficiency of the waste heat boiler.
The slag condensing tube bundle is used for collecting and removing most dust in smoke, the first slag condensing tube bundle 2 is formed by film-type wall tubes through dilution, and the second slag condensing tube bundle 3 is a convection evaporator 5 with a group of tube spacing dilution and performs countercurrent heat exchange with the smoke. The superheaters are divided into three groups, and the whole system adopts downstream heat exchange. Wherein the low-temperature superheater 4.1, the first high-temperature superheater 4.2 and the second high-temperature superheater 4.3 are connected in series, a desuperheater 7 is arranged between the low-temperature superheater and the first high-temperature superheater, and the desuperheater 7 is favorable for controlling the temperature of superheated steam, so that the corrosion of a pipe caused by overhigh steam temperature is avoided. The evaporator 5 is arranged after the superheater and before the economizer. The coal economizer adopts two stages, namely a first coal economizer 6.1 and a second coal economizer 6.2, wherein the two stages of coal economizers are connected in series and perform countercurrent heat exchange with the flue gas.
The ash cleaning accessories comprise a shock wave soot blower 8, an elastic vibrator 9, a cooling type vibrating rod 12, a bin wall vibrator 10, a platform 11 in the furnace, a manhole 14 and a membrane wall ash bucket 13. Wherein, the shock wave soot blower 8 is installed on the top of the waste heat boiler, and the detonation shock wave emitted by the shock wave soot blower washes the accumulated soot in the tube bundle from top to bottom; the elastic vibrator 9 is arranged on the side surface of the waste heat boiler, and transmits the knocking force to the tube bundle by knocking the cooling type vibrating rod 12 to vibrate and drop accumulated dust; the bin wall vibrator 10 is arranged on a membrane type wall on the side surface of the waste heat boiler, and removes dust deposited on the smoke side of the membrane type wall through vibration; the furnace inner platform 11 is arranged between every two groups of heating surface tube bundles, so that the observation and manual cleaning of accumulated dust and the observation of corrosion are facilitated; manholes 14 are arranged between every two groups of heating surface tube bundles and below each group of heating surface tube bundles, so that the accumulated dust can be conveniently observed and manually cleaned, and the corrosion can be conveniently observed; the membrane wall ash bucket 13 is arranged along the length direction of the waste heat boiler, so that the ash bucket 13 is prevented from accumulating ash.
The shock wave soot blowers 8 are arranged on the top of the waste heat boiler, and are symmetrically arranged above each group of heating surface tube bundles along the width direction of the boiler. The detonation shock wave generated by the device scours the accumulated dust of the tube bundle from top to bottom. The elastic vibrator 9 is arranged on the side surface of the waste heat boiler, and transmits the knocking force to the tube bundle by knocking the cooling type vibrating rod 12 to vibrate and drop accumulated dust. The bin wall vibrator 10 is arranged on the membrane wall on the side surface of the waste heat boiler, and removes dust deposited on the inner side of the membrane wall through vibration. The in-furnace platform 11 is arranged between every two groups of heating surface tube bundles, so that the accumulated dust can be conveniently observed and manually cleaned, and the corrosion condition in the furnace can be conveniently observed. The manholes 14 are arranged between every two groups of heating surface tube bundles and below each group of heating surface tube bundles, and are large in number, so that accumulated dust can be observed and cleaned manually, and the corrosion condition in the furnace can be observed conveniently; the membrane wall ash bucket 13 is arranged along the length direction of the waste heat boiler, so that the ash bucket 13 is prevented from accumulating ash. The denitration spray gun 15 is arranged at the inlet of the waste heat boiler, so that the concentration of low NOx in exhaust smoke of the waste heat boiler can be reduced, and the requirement of environmental protection emission is met.
The invention adopts a horizontal structure combining natural circulation and forced circulation, realizes sensible heat limit recovery of flue gas in a combined mode, and obviously reduces the power consumption of forced circulation. The steam-water separation of natural circulation and forced circulation is completed in the same steam drum. And high-temperature metal compensators are arranged at the inlet and the outlet to absorb the temperature expansion of the recovery device. The limit recovery of the sensible heat of the flue gas is realized by adopting a combined structure of a radiation membrane type wall, a convection tube bundle, a superheater and an economizer tube bundle.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a waste heat boiler for retrieving rotary hearth furnace flue gas heat which characterized in that, includes the body, sets up the first congealing the slag tube bank in its one end, along this internal flue gas direction of motion arrange be used for with the flue gas carry out a plurality of second congeals the slag tube bank of heat transfer and follow this internal flue gas direction of motion arrange superheater, evaporimeter, economizer.
2. The waste heat boiler for recovering heat of flue gas of a rotary hearth furnace as claimed in claim 1, wherein the superheater is provided with a low temperature superheater and a high temperature superheater arranged in series in the moving direction of flue gas in the body.
3. The waste heat boiler for recovering flue gas heat of a rotary hearth furnace as claimed in claim 2, wherein there are two high temperature superheaters, a first high temperature superheater and a second high temperature superheater, which are respectively connected in series with the low temperature superheater.
4. The waste heat boiler for recovering heat of flue gas of a rotary hearth furnace as claimed in claim 1 or 2, characterized in that a desuperheater is arranged between the high-temperature superheater and the low-temperature superheater.
5. The waste heat boiler for recovering flue gas heat of a rotary hearth furnace as claimed in claim 1, wherein the economizer is composed of a first economizer and a second economizer connected in series.
6. The waste heat boiler for recovering heat from flue gas of a rotary hearth furnace as claimed in claim 1, further comprising shock wave soot blowers mounted on a top of the body and arranged in cooperation with the second solidified slag tube bundle, the soot blowers being symmetrically arranged in a direction perpendicular to a direction of movement of the flue gas in the body.
7. The waste heat boiler for recycling the flue gas heat of the rotary hearth furnace as recited in claim 1, further comprising elastic rappers arranged at the side of the body, wherein cooling rapping rods are connected between the elastic rappers which are symmetrically arranged.
8. The waste heat boiler for recovering flue gas heat of a rotary hearth furnace as claimed in claim 1, further comprising a wall rapper mounted on the body.
9. The waste heat boiler for recovering flue gas heat of a rotary hearth furnace as claimed in claim 1 or 8, wherein said bottom of said body is provided with an ash hopper along a length direction thereof.
10. The waste heat boiler for recycling flue gas heat of a rotary hearth furnace as claimed in claim 1, wherein a furnace inner platform and/or a manhole is provided between adjacent second slag condenser tube bundles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010505760.3A CN111637431A (en) | 2020-06-05 | 2020-06-05 | Waste heat boiler for recycling smoke heat of rotary hearth furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010505760.3A CN111637431A (en) | 2020-06-05 | 2020-06-05 | Waste heat boiler for recycling smoke heat of rotary hearth furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111637431A true CN111637431A (en) | 2020-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010505760.3A Withdrawn CN111637431A (en) | 2020-06-05 | 2020-06-05 | Waste heat boiler for recycling smoke heat of rotary hearth furnace |
Country Status (1)
| Country | Link |
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| CN (1) | CN111637431A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3090899A (en) * | 1999-03-15 | 2000-10-04 | Maumee Research & Engineering, Inc. | A method and apparatus for reducing a feed material in a rotary hearth furnace |
| CN2602307Y (en) * | 2003-01-28 | 2004-02-04 | 郑州锅炉厂 | Exhaust-heating boiler |
| CN202012897U (en) * | 2011-01-24 | 2011-10-19 | 大连易世达新能源发展股份有限公司 | Cement kiln tail bypass wind discharging exhaust-heat boiler |
| CN102635844A (en) * | 2012-05-14 | 2012-08-15 | 中江能源回收(上海)有限公司 | Boiler system using waste heat of flue gas of rotary hearth furnace |
| CN106288830A (en) * | 2016-08-27 | 2017-01-04 | 安徽海螺川崎节能设备制造有限公司 | A kind of smelting furnace waste heat boiler |
| CN206001973U (en) * | 2016-08-31 | 2017-03-08 | 重庆赛迪热工环保工程技术有限公司 | A kind of water-cooled rapping lever system |
| CN206724722U (en) * | 2017-04-01 | 2017-12-08 | 江苏省冶金设计院有限公司 | Rotary hearth furnace fume afterheat gradient utilization system |
| CN207035167U (en) * | 2017-07-26 | 2018-02-23 | 辽宁亿赛普节能技术有限公司 | Automatic ash handling system |
-
2020
- 2020-06-05 CN CN202010505760.3A patent/CN111637431A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU3090899A (en) * | 1999-03-15 | 2000-10-04 | Maumee Research & Engineering, Inc. | A method and apparatus for reducing a feed material in a rotary hearth furnace |
| CN2602307Y (en) * | 2003-01-28 | 2004-02-04 | 郑州锅炉厂 | Exhaust-heating boiler |
| CN202012897U (en) * | 2011-01-24 | 2011-10-19 | 大连易世达新能源发展股份有限公司 | Cement kiln tail bypass wind discharging exhaust-heat boiler |
| CN102635844A (en) * | 2012-05-14 | 2012-08-15 | 中江能源回收(上海)有限公司 | Boiler system using waste heat of flue gas of rotary hearth furnace |
| CN106288830A (en) * | 2016-08-27 | 2017-01-04 | 安徽海螺川崎节能设备制造有限公司 | A kind of smelting furnace waste heat boiler |
| CN206001973U (en) * | 2016-08-31 | 2017-03-08 | 重庆赛迪热工环保工程技术有限公司 | A kind of water-cooled rapping lever system |
| CN206724722U (en) * | 2017-04-01 | 2017-12-08 | 江苏省冶金设计院有限公司 | Rotary hearth furnace fume afterheat gradient utilization system |
| CN207035167U (en) * | 2017-07-26 | 2018-02-23 | 辽宁亿赛普节能技术有限公司 | Automatic ash handling system |
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Application publication date: 20200908 |
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