CN101832572A - Method for leading flue gas out of sintering flue gas waste heat utilization system without using induced draft fan - Google Patents
Method for leading flue gas out of sintering flue gas waste heat utilization system without using induced draft fan Download PDFInfo
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- CN101832572A CN101832572A CN201010127985A CN201010127985A CN101832572A CN 101832572 A CN101832572 A CN 101832572A CN 201010127985 A CN201010127985 A CN 201010127985A CN 201010127985 A CN201010127985 A CN 201010127985A CN 101832572 A CN101832572 A CN 101832572A
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Abstract
The invention discloses a method for leading flue gas out of a sintering flue gas waste heat utilization system without using an induced draft fan and belongs to the technical field of sintering machine flue gas waste heat utilization technology in steel industry. Flue gas on the tail part of a sintering machine enters a waste heat boiler through a tail air box and a flue gas branch pipe to exchange heat with a working medium; after the flue gas exchanges heat with the working medium, low-temperature flue gas enters a non-desulfurated smoke collecting header or a main smoke collecting header of a sintering system through a waste heat boiler flue passage arranged at one end of the waste heat boiler, and is led out and emptied after dust in the low-temperature flue gas is removed by a main exhaust fan in the non-desulfurated smoke collecting header or the main smoke collecting header. Equipment cost as well as running and maintenance costs increased due to the arrangement of an induced draft fan on the tail part of the waste heat boiler in a conventional sintering waste heat utilization system are saved and potential safety hazard to the system caused by running the induced draft fan in a severe environment is eliminated.
Description
Technical field
The invention belongs to steel industry sintering device flue gas UTILIZATION OF VESIDUAL HEAT IN technical field, be particularly related to a kind of sinter fume bootstrap system inducing free fan flue gas outbound course, it is in sinter fume UTILIZATION OF VESIDUAL HEAT IN process, and flue gas does not need the air-introduced machine pressurization just can discharge smoothly after residual heat boiler for exchanging heat.
Background technology
Sintering deposit can produce big calorimetric flue gas in sintering process, these hot flue-gas temperatures are between 50 ℃-450 ℃, and sulfur content is between 0mg/L-9000mg/L, and temperature and sulfur content are inhomogeneous along sintering machine length direction distributed pole.Therefore many big-and-middle-sized sintering plants have all optionally carried out purified treatment to sinter fume before discharging: be provided with the female pipe 4 of female pipe 3 of desulfurization collection cigarette and non-desulfurization collection cigarette in sintering machine 1 both sides, the flue gas that sintering machine middle part sulfur content is high is directed to dedusting after the female pipe 3 of desulfurization collection cigarette compiles, desulfurizer purifies, take discharging away by main exhauster on the female pipe 3 of desulfurization collection cigarette again, and sintering machine 1 head and the low-sulfur content flue gas of afterbody are after the female pipe 4 of non-desulfurization collection cigarette compiles, through dust removal process, extract emptying out by main exhauster on the female pipe 4 of non-desulfurization collection cigarette then again.
Because sintering machine 1 middle part flue gas sulfur content height, the waste heat recovery cost is big, and sintering machine head flue-gas temperature is lower and do not have value, and the sinter fume that therefore carries out waste heat recovery is all taken from the non-desulfurization flue gas of sintering machine afterbody.The exhaust gas volumn that participates in waste heat recovery will be decided on sintering machine scale and sinter fume temperature, generally be from sintering machine 1 afterbody second-to-last bellows, the flue gas that draws 2-5 afterbody bellows is to waste heat boiler 15 heating working medium water, flue gas after the heat exchange is evacuated in female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette by the air-introduced machine that is located at waste heat boiler back-end ductwork back again, extracted out emptying by main exhauster after dedusting, this is the lead-out mode after the existing sinter fume UTILIZATION OF VESIDUAL HEAT IN.At this, the effect that air-introduced machine is set is for flue gas provides enough power, makes it can overcome flue resistance, flow to female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette from the sintering bellows swimmingly.Yet the drawback of this mode is to establish a high-power air-introduced machine at boiler tail, has not only increased cost of equipment, and owing to dustiness in the flue gas is big, the air-introduced machine work under bad environment is brought hidden danger to system safety operation simultaneously.
Summary of the invention
The cost of equipment that exists at lead-out mode after the existing sinter fume UTILIZATION OF VESIDUAL HEAT IN increases, there is the deficiency of hidden danger in system's operation, the present invention aims to provide a kind of sinter fume bootstrap system inducing free fan flue gas outbound course, this method only relies on the main exhauster on female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette just can be with the whole carrying-offs of the flue gas after the UTILIZATION OF VESIDUAL HEAT IN, and the system that do not influence normally moves.
For achieving the above object, technical scheme that the present invention adopts is: a kind of sinter fume bootstrap system inducing free fan flue gas outbound course, be provided with female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette in sintering machine one side, be communicated with a plurality of afterbody bellows with the afterbody of sintering machine, afterbody bellows one end is connected with afterbody bellows arm, this afterbody bellows arm is communicated with female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette, on afterbody bellows arm, be provided with the flue gas arm that is communicated with it near the afterbody bellows, this flue gas arm is communicated with waste heat boiler via advancing the female pipe of exhaust-heat boiler flue gas, its design feature is that the other end of described waste heat boiler is communicated with by female pipe of waste heat boiler back-end ductwork and non-desulfurization collection cigarette or the female pipe of main collection cigarette; Be provided with afterbody bellows manifold valve on the described afterbody bellows arm and between flue gas arm and female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette; Described flue gas arm is provided with the flue gas manifold valve; Be provided with between the flue gas manifold valve on described afterbody bellows manifold valve and the flue gas arm and open and close interlocking; Concrete flue gas outbound course is: the aperture of regulating afterbody bellows manifold valve and flue gas manifold valve, make the flue resistance in the waste heat boiler not be higher than 800Pa, rely on the main exhauster in female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette the low-temperature flue gas after the dedusting can be drawn emptying.
The so-called interlocking that opens and closes is afterbody bellows manifold valve aperture when turning down, and flue gas manifold valve aperture is transferred big automatically; When afterbody bellows manifold valve is closed fully, the automatic complete opening of flue gas manifold valve; And during afterbody bellows manifold valve complete opening, the flue gas manifold valve is closed automatically fully.
When sintering machine ordinary production or underrun, afterbody bellows manifold valve is finished surplus closing, the automatic complete opening of flue gas manifold valve, sinter fume is collected to the into female pipe of exhaust-heat boiler flue gas from each flue gas arm, advance the sintering waste heat boiler again, heat exchange in stove is extracted emptying out by main exhauster after boiler back end ductwork and the electronic baffle plate of waste heat boiler tail flue gas are pumped down to female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette then again after the deduster dedusting.
When the sintering machine heavy-duty service, regulate the aperture of afterbody bellows manifold valve, the flue gas manifold valve suitably turns down automatically, this moment, the fraction sinter fume was flowed directly to female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette from afterbody bellows arm, most of sinter fume is collected to the into female pipe of exhaust-heat boiler flue gas through each flue gas arm, advances sintering waste heat boiler and working medium heat exchange again.。
Described afterbody bellows manifold valve is for controlling the motor-driven valve of the flue gas flow that enters female pipe of non-desulfurization collection cigarette or main collection cigarette mother pipe automatically; The flue gas manifold valve enters the interior flue gas flow of waste heat boiler and the motor-driven valve of flue gas resistance for controlling automatically.
Be provided with the electronic baffle plate of waste heat boiler tail flue gas in the described waste heat boiler back-end ductwork.
Sinter fume flow to waste heat boiler from sintering machine afterbody bellows, flow to female pipe of non-desulfurization collection cigarette or the emptying of the female pipe of main collection cigarette again, the power of whole flow process is provided by main exhauster air entry pressure by air pressure difference in blast in the sintering machine afterbody bellows and female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette; In equipment and pipeline that sinter fume is flowed through, maximum flow resistance is from the flue resistance in the waste heat boiler, this part resistance accounts for more than 2/3 of whole flue resistances, therefore, if require to guarantee flue gas smooth and easy circulation under the situation of not establishing air-introduced machine, the flue resistance that must control in the waste heat boiler is not higher than 800Pa, thereby realize that the waste heat boiler back-end ductwork do not establish air-introduced machine, only by the main exhauster suction force in female pipe of the existing non-desulfurization collection cigarette of sintering system or the female pipe of main collection cigarette and make sinter fume at sintering machine afterbody bellows, the flue gas arm, waste heat boiler, female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette, smooth and easy circulation between the deduster.
The present invention realizes that the key of its technique effect is the flue resistance of rationally controlling in the waste heat boiler, make waste heat boiler inner flue resistance and system's smoke pipe resistance sum suction force less than main exhauster, flue gas could flow to female pipe of non-desulfurization collection cigarette or the female pipe of main collection cigarette from sintering machine wind box swimmingly like this, is taken away by main exhauster.
Below the present invention made further specify.
Referring to shown in Figure 1, according to sintering machine 1 tail flue gas amount and flue-gas temperature situation, from sintering machine 1 afterbody second-to-last afterbody bellows, the flue gas that draws 2～5 afterbody bellows 9 advances waste heat boiler 15; Installing afterbody bellows manifold valve 11 on the afterbody bellows arm 10 of several afterbody bellows 9 of utilizing that has surplus heat, before the afterbody bellows manifold valve 11 of afterbody bellows arm 10, be installed up to the flue gas arm 12 of waste heat boiler 15, and on flue gas arm 12, install flue gas manifold valve 13, between afterbody bellows manifold valve 11 and flue gas manifold valve 13, be provided with and open and close interlocking; The so-called interlocking that opens and closes is afterbody bellows manifold valve 11 apertures when turning down, and flue gas manifold valve 13 apertures are transferred big automatically; When afterbody bellows manifold valve 11 is closed fully, flue gas manifold valve 13 automatic complete openings; And during afterbody bellows manifold valve 11 complete openings, flue gas manifold valve 13 is closed automatically fully.
When sintering machine 1 ordinary production or underrun, afterbody bellows manifold valve 11 is closed fully, flue gas manifold valve 13 automatic complete openings, sinter fume is collected to female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette from each flue gas arm 12, enter heat exchange in the sintering waste heat boiler 15 again, heat exchange in stove is extracted emptying out by main exhauster after the electronic baffle plate 17 of boiler back end ductwork 16 and waste heat boiler tail flue gas is pumped down to female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette then again after the deduster dedusting.
When sintering machine 1 heavy-duty service, regulate the aperture of afterbody bellows manifold valve 11, flue gas manifold valve 13 suitably turns down automatically, this moment, a part of sinter fume was flowed directly to female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette from afterbody bellows arm 10, another part sinter fume is collected to the into female pipe 14 of exhaust-heat boiler flue gas through each flue gas arm 12, enter heat exchange in the sintering waste heat boiler 15 again, heat exchange in stove is after the electronic baffle plate 17 of boiler back end ductwork 16 and waste heat boiler tail flue gas, be pumped down to female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette then, after the deduster dedusting, extract emptying out by main exhauster again.
When sintering machine 1 start and stop or bootstrap system maintenance, flue gas manifold valve 13 is closed fully, afterbody bellows manifold valve 11 automatic complete openings, and flue gas flow to the female pipe 4 of non-desulfurization collection cigarette by afterbody bellows arm 10, does not advance waste heat boiler 15.
Compared with prior art, the invention has the beneficial effects as follows: the present invention has cancelled the way of existing sinter fume extraction system at an air-introduced machine of waste heat boiler afterbody installing, the main exhauster that only relies on female pipe of non-desulfurization collection cigarette or master to collect on the female pipe of cigarette just can be with the whole carrying-offs of the flue gas after the UTILIZATION OF VESIDUAL HEAT IN, and the system that do not influence normally moves, saved existing sintering waste heat and utilized system to need cost of equipment and the operating maintenance expense that increases at waste heat boiler afterbody installing air-introduced machine, eliminated air-introduced machine and under adverse circumstances, moved the potential safety hazard of bringing to system; Employed apparatus structure is simple, and is easy to operate, and energy conservation and consumption reduction effects is obvious.
Description of drawings
Fig. 1 is the technical process control schematic diagram of an embodiment of the present invention.
In the drawings:
The 1-sintering machine, the 2-sintering deposit,
The female pipe of 3-desulfurization collection cigarette, the female pipe of the non-desulfurization collection of 4-cigarette,
5-head bellows, 6-head bellows arm,
7-middle part bellows, 8-middle part bellows arm,
9-afterbody bellows, 10-afterbody bellows arm,
11-afterbody bellows manifold valve, 12-flue gas arm,
13-flue gas manifold valve, 14-advances the female pipe of exhaust-heat boiler flue gas,
The 15-waste heat boiler, 16-waste heat boiler back-end ductwork,
The electronic baffle plate of 17-waste heat boiler tail flue gas.
The specific embodiment
A kind of sinter fume bootstrap system inducing free fan flue gas outbound course, as shown in Figure 1, be provided with the female pipe 4 of non-desulfurization collection cigarette in sintering machine 1 one sides, be communicated with 4 afterbody bellows 9 with the afterbody of sintering machine 1, afterbody bellows 9 one ends are connected with afterbody bellows arm 10, this afterbody bellows arm 10 is communicated with the female pipe 4 of non-desulfurization collection cigarette, on afterbody bellows arm 10, be provided with the flue gas arm 12 that is communicated with it near afterbody bellows 9, this flue gas arm 12 is communicated with waste heat boiler 15 via advancing the female pipe of exhaust-heat boiler flue gas 14, and the other end of described waste heat boiler 15 is managed 4 by waste heat boiler back-end ductwork 16 and non-desulfurization collection cigarette mother and is communicated with; Be provided with afterbody bellows manifold valve 11 on the described afterbody bellows arm 10 and between flue gas arm 12 and the female pipe 4 of non-desulfurization collection cigarette; Described flue gas arm 12 is provided with flue gas manifold valve 13; Be provided with between described afterbody bellows manifold valve 11 and the flue gas manifold valve 13 and open and close interlocking.
Described waste heat boiler back-end ductwork 16 is provided with the electronic baffle plate 17 of waste heat boiler tail flue gas.
Described afterbody bellows manifold valve 11 enters the motor-driven valve of the exhaust gas volumn size of female pipe 4 of non-desulfurization collection cigarette or the female pipe of main collection cigarette for control automatically, and described flue gas manifold valve 13 enters the exhaust gas volumn size in the waste heat boiler 15 and the motor-driven valve of flue resistance for control automatically.
The so-called interlocking that opens and closes is afterbody bellows manifold valve 11 apertures when turning down, and flue gas manifold valve 13 apertures are transferred big automatically; When afterbody bellows manifold valve 11 is closed fully, flue gas manifold valve 13 automatic complete openings; And during afterbody bellows manifold valve 11 complete openings, flue gas manifold valve 13 is closed automatically fully.
Concrete flue gas outbound course is:
When sintering machine 1 ordinary production or underrun, afterbody bellows manifold valve 11 is closed fully, flue gas manifold valve 13 automatic complete openings, sinter fume is collected to the female pipe 4 of non-desulfurization collection cigarette from each flue gas arm 12, enter heat exchange in the sintering waste heat boiler 15 again, heat exchange in stove is extracted emptying out by main exhauster after the electronic baffle plate 17 of boiler back end ductwork 16 and waste heat boiler tail flue gas is pumped down to the female pipe 4 of non-desulfurization collection cigarette then again after the deduster dedusting.
When sintering machine 1 heavy-duty service, automatically regulate the aperture of afterbody bellows manifold valve 11, flue gas manifold valve 13 suitably turns down automatically, this moment, a part of sinter fume was flowed directly to the female pipe 4 of non-desulfurization collection cigarette from afterbody bellows arm 10, another part sinter fume is collected to the into female pipe 14 of exhaust-heat boiler flue gas through each flue gas arm 12, enter heat exchange in the sintering waste heat boiler 15 again, heat exchange in stove is after the electronic baffle plate 17 of boiler back end ductwork 16 and waste heat boiler tail flue gas, be pumped down to the female pipe 4 of non-desulfurization collection cigarette then, after the deduster dedusting, extract emptying out by main exhauster again.
When sintering machine 1 start and stop or bootstrap system maintenance, flue gas manifold valve 13 is closed fully, afterbody bellows manifold valve 11 automatic complete openings, and flue gas flow to the female pipe 4 of non-desulfurization collection cigarette by afterbody bellows arm 10, does not advance waste heat boiler 15.
Different with existing sinter fume bootstrap system, the present invention does not establish air-introduced machine on waste heat boiler back-end ductwork 16, sinter fume flow to waste heat boiler 15 from sintering machine 1 afterbody bellows 9 through flue gas arm 12, flow to emptying in the female pipe 4 of non-desulfurization collection cigarette again, the power of whole flow process is provided by the main exhauster air entry pressure by air pressure difference in blast in the sintering machine 1 afterbody bellows 9 and the female pipe 4 of non-desulfurization collection cigarette.In equipment and pipeline that sinter fume is flowed through, maximum flow resistance is from waste heat boiler 15 inner flue resistances, this part resistance accounts for more than 2/3 of whole flue resistances, and therefore, the flue resistance in the control waste heat boiler is the key that guarantees flue gas smooth and easy circulation under the situation of not establishing air-introduced machine.When flue gas resistance was no more than 800Pa in the waste heat boiler, flue gas can smooth and easy circulation, and through appropriate design, the flue gas resistance under prior art in the control boiler 15 is not higher than 800Pa can be realized fully.
Method and apparatus of the present invention both had been applicable to that the fume afterheat of the sintering machine that is provided with the female pipe of the female Guan Yufei desulfurization of desulfurization collection cigarette collection cigarette utilized system; also be applicable to and only establish a female pipe of main collection cigarette; and the hot fume afterheat of the sintering machine of the sinter fume separate collection not being handled utilizes system; therefore the present invention is not establishing the female pipe of two collection of desulfurization and non-desulfurization cigarette, and has only the application on the sintering machine of a main collection cigarette mother pipe also should be protected.
Claims (3)
1. sinter fume bootstrap system inducing free fan flue gas outbound course, be provided with female pipe of non-desulfurization collection cigarette (4) or the female pipe of main collection cigarette in sintering machine (1) one side, be communicated with a plurality of afterbody bellows (9) with the afterbody of sintering machine (1), afterbody bellows (9) one ends are connected with afterbody bellows arm (10), this afterbody bellows arm (10) is communicated with female pipe of non-desulfurization collection cigarette (4) or the female pipe of main collection cigarette, go up close afterbody bellows (9) at afterbody bellows arm (10) and be provided with the flue gas arm (12) that is communicated with it, this flue gas arm (12) is communicated with waste heat boiler (15) via advancing the female pipe of exhaust-heat boiler flue gas (14), it is characterized in that the other end of described waste heat boiler (15) is communicated with female pipe of non-desulfurization collection cigarette (4) or the female pipe of main collection cigarette by waste heat boiler back-end ductwork (16); Described afterbody bellows arm (10) is gone up and is positioned between flue gas arm (12) and the female pipe of non-desulfurization collection cigarette (4) and is provided with afterbody bellows manifold valve (11); Described flue gas arm (12) is provided with flue gas manifold valve (13); Be provided with between the flue gas manifold valve (13) on described afterbody bellows manifold valve (11) and the flue gas arm (12) and open and close interlocking; Concrete flue gas outbound course is: the aperture of regulating afterbody bellows manifold valve (11) and flue gas manifold valve (13), make the flue gas resistance in the waste heat boiler (15) not be higher than 800Pa, rely on the main exhauster in female pipe of non-desulfurization collection cigarette (4) or the female pipe of main collection cigarette the low-temperature flue gas after the dedusting can be drawn emptying.
2. according to the described sinter fume bootstrap system of claim 1 inducing free fan flue gas outbound course, it is characterized in that described afterbody bellows manifold valve (11) is for controlling the motor-driven valve of the flue gas flow that enters female pipe of non-desulfurization collection cigarette (4) or main collection cigarette mother pipe automatically; Flue gas manifold valve (13) enters the interior flue gas flow of waste heat boiler (15) and the motor-driven valve of flue gas resistance for controlling automatically.
3. according to the described sinter fume bootstrap system of claim 1 inducing free fan flue gas outbound course, it is characterized in that, be provided with the electronic baffle plate of waste heat boiler tail flue gas (17) in the described waste heat boiler back-end ductwork (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101279856A CN101832572B (en) | 2010-03-19 | 2010-03-19 | Method for leading flue gas out of sintering flue gas waste heat utilization system without using induced draft fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101279856A CN101832572B (en) | 2010-03-19 | 2010-03-19 | Method for leading flue gas out of sintering flue gas waste heat utilization system without using induced draft fan |
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| CN101832572A true CN101832572A (en) | 2010-09-15 |
| CN101832572B CN101832572B (en) | 2011-10-12 |
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| CN2010101279856A Expired - Fee Related CN101832572B (en) | 2010-03-19 | 2010-03-19 | Method for leading flue gas out of sintering flue gas waste heat utilization system without using induced draft fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103615908A (en) * | 2013-12-11 | 2014-03-05 | 北京志能祥赢节能环保科技有限公司 | Combined waste heat recycling system for stepping-type flat-burning sintering machine |
| CN108613211A (en) * | 2018-06-08 | 2018-10-02 | 江苏双良新能源装备有限公司 | A kind of bypass type flue gas waste heat recovery system and its take cigarette control method |
| CN111366003A (en) * | 2020-03-25 | 2020-07-03 | 攀钢集团攀枝花钢钒有限公司 | Sintering flue gas waste heat utilization structure in desulfurization and denitrification system |
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| JPS63241124A (en) * | 1987-03-27 | 1988-10-06 | Sumitomo Metal Ind Ltd | Method for controlling temperature of circulating gas for sintering |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103615908A (en) * | 2013-12-11 | 2014-03-05 | 北京志能祥赢节能环保科技有限公司 | Combined waste heat recycling system for stepping-type flat-burning sintering machine |
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| CN108613211A (en) * | 2018-06-08 | 2018-10-02 | 江苏双良新能源装备有限公司 | A kind of bypass type flue gas waste heat recovery system and its take cigarette control method |
| CN111366003A (en) * | 2020-03-25 | 2020-07-03 | 攀钢集团攀枝花钢钒有限公司 | Sintering flue gas waste heat utilization structure in desulfurization and denitrification system |
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| CN101832572B (en) | 2011-10-12 |
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