CN101723605A - Afterheat recycling method based on steel-making double-hearth lime kiln - Google Patents
Afterheat recycling method based on steel-making double-hearth lime kiln Download PDFInfo
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- CN101723605A CN101723605A CN200910112920A CN200910112920A CN101723605A CN 101723605 A CN101723605 A CN 101723605A CN 200910112920 A CN200910112920 A CN 200910112920A CN 200910112920 A CN200910112920 A CN 200910112920A CN 101723605 A CN101723605 A CN 101723605A
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Abstract
The invention relates to an afterheat recycling method of a steel-making double-hearth lime kiln, which is used for the lime production process of the lime kiln in the steel-making process and aims at the condition that the smoke afterheat generated by lime sintering production has calorific power application value and the efficiency requirement of the production process of the lime kiln. In the afterheat recycling method of the steel-making double-hearth lime kiln, the smoke afterheat generated by the lime sintering production in an A hearth (or a B hearth) is used as the kiln hearth preheating of the B hearth (or the A hearth); and an A/B production sequential switching control method is provided. The invention has the characteristics of calorific power utilization of lime kiln smoke and double-hearth switching control.
Description
Technical field:
The present invention relates to a kind of steel-making double-hearth lime kiln recycling residual heat method.
Background technology:
Domestic limestone kiln mostly is single hearth lime kiln at present, technology falls behind, and this traditional single hearth lime kiln consumes energy greatly, yields poorly, and the high-temperature flue gas that generates directly enters atmosphere, not only caused the huge wasting of resources but also caused topsoil, brought very big drawback to manufacturing enterprise.
Tail gas (flue gas) the heat height that single hearth lime kiln produces, how to turn waste into wealth becomes the topic that a lot of enterprise is concerned about, such as (flue gas) heat is converted to the preheating of domestic hot-water supply, combustion air, preheating of coal gas or the like.The present invention carries out preheating to flue gas by another passage to Wingdale exactly, reaches recycling residual heat, and not only waste heat is fully utilized, and output also nearly doubles, and makes manufacturing enterprise obtain maximum economic interests.By retrieval, also there is not relevant bibliographical information.
Summary of the invention:
Technical problem to be solved by this invention is to invent a kind of based on steel-making double-hearth lime kiln recycling residual heat method.
The present invention is achieved in that the sintering limestone kiln is made up of the two thoraxes of A/B, fume afterheat with A thorax lime sintering production generation, as the kiln thorax preheating of B thorax, the high calorie fume afterheat that utilizes A thorax or B thorax sintering process to produce is originated as the calorific value of B thorax or the preheating of A thorax.
Fume afterheat with the production of A thorax lime sintering produces as the kiln thorax preheating of B thorax, and proposes A, B thorax switching production sequential control method, has the characteristics of limestone kiln flue gas calorific value utilization and two thorax conversion and control.
Description of drawings:
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the distribution plan of double-hearth lime kiln pipeline.
Fig. 2 is the left view of double-hearth lime kiln.
Fig. 3 is the front view of double-hearth lime kiln.
Fig. 4 is the cross-sectional view of the A-A of double-hearth lime kiln.
Among the figure: 1-coal gas reverse flow valve; 2-coal gas reversing valve A1; 3-coal gas reversing valve A2; 4-coal gas blow-off valve A; 5-coal gas reversing valve B1; 6-coal gas reversing valve B2; 7-coal gas blow-off valve B; 8-combustion air blow-off valve; 9-combustion air reverse checkvalve; 10-combustion air reversing valve A; 11-combustion air reversing valve B; 12-spray gun cooling air blow-off valve; 13-spray gun cooling air reversing valve A; 14-spray gun cooling air reversing valve B; 15-flue gas blow-off valve; 16-flue gas reversing valve A; 17-flue gas reversing valve B; 18-nitrogen purging trip valve A; 19-nitrogen purging trip valve B; 20-lime cooling air blow-off valve; 21-lime cooling air reverse checkvalve; The 22-gas fan; 23: burner blower; 24: the lime cooling blower; 25: the spray gun cooling blower; 26: flue gas; The import of 27-A thorax lime; The import of 28-B thorax lime.
Embodiment:
The main implementation of the present invention such as Fig. 1, concrete steps are as follows: A kiln thorax burning turns to each operated pneumatic valve action of burning of B kiln thorax as follows, open 18 earlier, 19, and close 7 simultaneously, 15, these valves open 1 after carrying out and putting in place again, 8,12,20 also close 9 simultaneously, 21, after these valves are carried out and are put in place, open 5 earlier, 6,11,13,15, and close 2 simultaneously, 3,10,14,17, these valves open 9 after carrying out and putting in place again, 21, and close 1 simultaneously, 8,12,20, these valves open 4 after carrying out and putting in place again, and close 18 simultaneously, 19, A kiln thorax burning turns to each operated pneumatic valve action of burning of B kiln thorax to finish, can safe combustion, the not danger that can blast, B kiln thorax burning turns to each operated pneumatic valve action of burning of A kiln thorax as follows, open 18 earlier, 19, and close 4 simultaneously, 7,15, these valves open 1 after carrying out and putting in place again, 8,12,20, and close 9 simultaneously, 21, these valves open 2 after carrying out and putting in place again, 3,10,14,17, and close 5 simultaneously, 6,11,13,16, these valves open 9 after carrying out and putting in place again, 21, and close 1 simultaneously, 8,12,20, these valves open 7 after carrying out and putting in place again, and close 18 simultaneously, 19, B kiln thorax burning turns to each operated pneumatic valve action of burning of A kiln thorax to finish smoothly.Quick switching by these valves, can effectively improve security, increase output, when A kiln thorax burnt, the flue gas of high calorie flowed to B kiln thorax by foot passage, gave the preheating of B kiln thorax, when B kiln thorax burns, the flue gas of high calorie flows to A kiln thorax by foot passage, gives the preheating of A kiln thorax, reaches the purpose of recycling residual heat.The two thoraxes of A/B are in the lime sintering process, and the two thoraxes of A/B can switch preheating.
Safety issue when solving double-hearth lime kiln two passages and switching is mutually switched and reliable feedback signal by rational valve, guarantees that the smooth execution of each valve puts in place.Cardinal principle is by the switching of coal gas reverse flow valve and emptying, removes ducted coal gas, then bubbling air.
The recycle method of the high calorie flue gas that A thorax (or B thorax) sintering process produces, promptly pass through the switching and the emptying of A thorax (or B thorax) coal gas reverse flow valve, remove its ducted coal gas, bubbling air carries out lime sintering to A thorax (or B thorax) then, A thorax (or B thorax) sintering combustion will produce the flue gas of high calorie, this flue gas enters B thorax (or A thorax) by the passage of bottom, limestone kiln from A thorax (or B thorax), to B thorax (or A thorax) preheating, to reach the high calorie fume afterheat that produces with coal gas sintering lime process, as the recycle purpose of two thorax preheatings.
Claims (3)
1. one kind based on steel-making double-hearth lime kiln recycling residual heat method, it is characterized in that the sintering limestone kiln is made up of the two thoraxes of A/B, fume afterheat with A thorax lime sintering production generation, as the kiln thorax preheating of B thorax, the high calorie fume afterheat that utilizes A thorax or B thorax sintering process to produce is originated as the calorific value of B thorax or the preheating of A thorax.
2. according to claim 1 a kind of based on steel-making double-hearth lime kiln recycling residual heat method, it is characterized in that the two thoraxes of A/B in the lime sintering process, the two thoraxes of A/B can switch preheating.
3. according to claim 1 and 2 a kind of based on steel-making double-hearth lime kiln recycling residual heat method, it is characterized in that the calorific value of B thorax or the preheating of A thorax is originated, switch by A, B thorax and produce the sequential control method realization.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910112920A CN101723605A (en) | 2009-12-08 | 2009-12-08 | Afterheat recycling method based on steel-making double-hearth lime kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910112920A CN101723605A (en) | 2009-12-08 | 2009-12-08 | Afterheat recycling method based on steel-making double-hearth lime kiln |
Publications (1)
| Publication Number | Publication Date |
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| CN101723605A true CN101723605A (en) | 2010-06-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200910112920A Pending CN101723605A (en) | 2009-12-08 | 2009-12-08 | Afterheat recycling method based on steel-making double-hearth lime kiln |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353272A (en) * | 2011-07-14 | 2012-02-15 | 周建安 | Comprehensive utilization method for smelting-plant lime-kiln tail gas |
| CN109506485A (en) * | 2018-12-14 | 2019-03-22 | 中冶焦耐(大连)工程技术有限公司 | Low-heat value gas MAERZ lime kiln exhaust heat utilization system |
| CN111964431A (en) * | 2020-06-29 | 2020-11-20 | 福建省气柜设备安装有限公司 | Flue gas recycling equipment of two thorax kilns of buggy |
| CN112791571A (en) * | 2021-01-04 | 2021-05-14 | 河北用邦环保设备科技有限公司 | Online denitration method for double-hearth kiln |
-
2009
- 2009-12-08 CN CN200910112920A patent/CN101723605A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353272A (en) * | 2011-07-14 | 2012-02-15 | 周建安 | Comprehensive utilization method for smelting-plant lime-kiln tail gas |
| CN102353272B (en) * | 2011-07-14 | 2013-07-10 | 周建安 | Comprehensive utilization method for smelting-plant lime-kiln tail gas |
| CN109506485A (en) * | 2018-12-14 | 2019-03-22 | 中冶焦耐(大连)工程技术有限公司 | Low-heat value gas MAERZ lime kiln exhaust heat utilization system |
| CN109506485B (en) * | 2018-12-14 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | Waste gas waste heat utilization system of low-calorific-value gas double-chamber shaft kiln |
| CN111964431A (en) * | 2020-06-29 | 2020-11-20 | 福建省气柜设备安装有限公司 | Flue gas recycling equipment of two thorax kilns of buggy |
| CN111964431B (en) * | 2020-06-29 | 2022-08-26 | 中琉科技有限公司 | Flue gas recycling equipment of two thorax kilns of buggy |
| CN112791571A (en) * | 2021-01-04 | 2021-05-14 | 河北用邦环保设备科技有限公司 | Online denitration method for double-hearth kiln |
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Open date: 20100609 |