CN2708125Y - Low-heat value gas thermal storage type sintering machine ignition furnace - Google Patents
Low-heat value gas thermal storage type sintering machine ignition furnace Download PDFInfo
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- CN2708125Y CN2708125Y CN 200420035676 CN200420035676U CN2708125Y CN 2708125 Y CN2708125 Y CN 2708125Y CN 200420035676 CN200420035676 CN 200420035676 CN 200420035676 U CN200420035676 U CN 200420035676U CN 2708125 Y CN2708125 Y CN 2708125Y
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Abstract
The utility model discloses a low-heat value gas thermal storage type sintering machine ignition furnace, comprising an ignition zone and a holding zone which are composed of steel construction outer wall, fire resistive material inner wall and a bottom travelling wheel device. The furnace wall is provided with a firing burner tip, and the furnace arch is provided with a heat accumulating burner and a plurality of straight nozzles. The heat accumulating burner comprises two heat accumulating burner tip groups comprising a plurality of heat accumulating burner tips. A two-position four-way change valve is respectively connected with the two connecting main pipes of the two heat accumulating burner tip groups, an air or gas afferent pipe and a smoke flow regulating valve. The gas sprayed in through the ejector nozzle of the heat accumulating burner tip and the straight nozzle mixes with the air and burns simultaneously. The gas afferent pipe is provided with a quick cut valve. The air and gas preheater is canceled in the utility model, saving investment. The single preheating modus of preheating air or gas only is used with low-heat value gas. The firing temperature reaches 1200 degrees C, and the exhaust gas temperature is lower than 150 degrees C . The utility model has the advantages of less fuel-consumption, compact conformation, small size and convenient operation and maintenance.
Description
Technical field
The utility model relates to the ignition furnace of sintering machine of metallurgy industry, particularly uses the heat accumulating type ignition furnace of sintering machine of low-heat value gas.
Background technology
Sintering is a metallurgy industry, and particularly the important component part of ore set-up procedure in the smelting iron and steel also is simultaneously one of key operation of the whole smelting process energy consumption index of influence.For optimizing energy resource structure, it is fuel that present most of sintering plant ignition furnace all adopts low-heat value gas, because the low-heat value gas calorific value is low, must carry out preheating to coal gas and air and could satisfy the required firing temperature requirement of sintering process, therefore build the low-heat value gas ignition furnace, necessary auxiliary construction preheating furnace preheating gas and air cause the ignition furnace profile big, and investment is high; The preheating method that generally adopts is that cold air and coal gas flow in pipeline in addition, heat medium is to the indirect mode of pipeline heating, and the thermal efficiency is low, ignition furnace fuel consumption height; Preheat temperature is subjected to the restriction of correlated condition such as equipment material, and the air themperature after preheating is generally less than 450 ℃, and coal gas is because of being subjected to the restriction of safety factor, and generally preheat temperature is less than 300 ℃; Preheating furnace is long service time, and the easier preheat temperature that causes reduces, and makes the sintering deposit decrease in yield.
Summary of the invention
The utility model purpose is the defective that overcomes above-mentioned prior art, provide a kind of without preheating furnace, and only preheated air or coal gas is a kind of, air or low-heat value gas can be preheated to high temperature, reach firing temperature, make low-heat value gas can be directly used in the low-heat value gas heat accumulating type ignition furnace of sintering machine of high temperature dot stove.
Realize that the technical scheme that the utility model purpose adopts is to design by the exotic fuels ignition furnace, comprise igniting section and soaking zone, igniting section and soaking zone all are made up of steel construction outer wall and refractory material interior wall, the bottom all is provided with away wheel apparatus, igniting section middle part is provided with the burner of igniting, pallet moves horizontally in its burner hearth through igniting section to soaking zone, makes ore deposit to be sintered obtain igniting.On the igniting section furnace roof heat-storage type burner is set, heat-storage type burner comprises the heat-accumulating burner group with equal number heat-accumulating burner of 2 symmetric arrangement, each heat-accumulating burner is made up of the spout that heat storage of filling in the heat-insulation layer of building by laying bricks or stones around in steel construction shell, the shell, the casing that heat-insulation layer forms and bottom are provided with, and the connecting branch of each heat-accumulating burner passes through the stokehold control valve and is connected house steward's connection with same group heat-accumulating burner group.Four interfaces of Pneumatic two-position four-way reversal valve are connected house steward with 2 of 2 heat-accumulating burner groups respectively, a kind of combustion medium input pipe is connected with the smoking adjustable valve, make a kind of combustion medium after the preheating of a heat-accumulating burner group, spray into an igniting section burner hearth, and in the igniting section burner hearth part high-temperature flue gas through another heat-accumulating burner group heat absorption back from smoking adjustable valve and induced-draught fan and chimney discharge; Every behind certain hour the running status commutation of 2 heat-accumulating burner groups carry out.On the igniting section furnace roof some straight tubes are set, every straight tube is between the symmetrical in twos heat-accumulating burner of 2 heat-accumulating burner groups, and is communicated with another kind of combustion medium input pipe by its stokehold control valve, burn while mixing by coal gas and the air that certain jet angle sprays in section burner hearth of lighting a fire through heat-accumulating burner spout and furnace roof straight tube respectively.The smoking adjustable valve other end that one end connects two-position four way change valve is connected with chimney with air-introduced machine by the smoke evacuation collector.Electric control valve and the flowmeter of regulating its input quantity are set respectively on air, the gas inlet pipe road, also add a pneumatic valve of cutting soon on the gas inlet pipe road.Industrial computer is adopted in the burning control of ignition furnace and the commutation of air or coal gas control, and industrial computer sends instruction by setup program, by electronic or each control valve of pneumatic actuator switch.
The utility model adopts single preheating method operation, the combustion medium input channel that is connected with two-position four way change valve is the air input pipe, then the combustion medium input channel that is connected with igniting section furnace roof straight tube is a gas inlet pipe, the combustion medium input channel that perhaps is connected with two-position four way change valve is a gas inlet pipe, and then the combustion medium input channel that is connected with igniting section furnace roof straight tube is the air input pipe.
The heat storage of filling in the utility model heat-accumulating burner internal box preferably adopts ceramic honeycomb body.
The heat-insulation layer of the utility model heat-accumulating burner preferably adopts clay to pour into a mould in conjunction with lightening casting material, and spout preferably adopts the low cement deposit material of high alumina matter integrated poured.
The utility model has the advantages that: cancelled air, the gas preheating stove of traditional design, dwindled ignition furnace appearance and size, saved investment; Only adopt a kind of single preheating method in preheated air or the coal gas, realized high temperature preheating, low calorie fuels is directly utilized, use low-heat value gas, the ignition furnace temperature still can reach 1200 ℃, and is lower to the gas pressure requirement simultaneously, but gas pressure is also stable operation of 3000Pa; Less than 150 ℃, near the limiting value of waste heat recovery, fuel consumption reduces significantly, energy savings with the flue gas exhaust gas temperature in preheating; Profile and high heating value gas ignition furnace are identical, compact conformation, and appearance and size is little, heat energy utilization rate height, operation, easy to maintenance.
Description of drawings
Fig. 1 is the top plan view of the utility model low-heat value gas heat accumulating type ignition furnace of sintering machine;
Fig. 2 is the A-A facade view of Fig. 1;
Fig. 3 is the B-B cross-section cutaway view of Fig. 1.
The specific embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
The utility model is pressed the design of exotic fuels ignition furnace, be divided into 1 two sections of igniting section 2 and soaking zones, coal gas and air mix in igniting section 2, combustion heat supplying, soaking zone 1 utilizes the width of cloth of igniting section 2 to penetrate not heat supply separately of heat, the pallet 29 of sintering machine is introduced into igniting section 2, enter soaking zone 1 again, in parallel mobile process, finish to pallet in the sintering ignition of ore 28.The ignition furnace furnace roof adopts the open hearth top, and what igniting section 2 and soaking zone 1 furnace bottom installed all that several support whole body of heater walks wheel apparatus 23.The ignition furnace furnace wall also by traditional design, is made of steel construction outer wall 21 and refractory material interior wall 22, and igniting section 2 and soaking zone 1 are all prefabricated separately, assemble at the scene during construction.The middle part of igniting section 2 is provided with the burner 20 of igniting by traditional design, furnace roof in igniting section 2 is provided with heat-storage type burner, it is made up of 2 heat-accumulating burner groups 3 and 4 of symmetric arrangement, the heat-accumulating burner that each heat-accumulating burner group all has several close parallel to arrange, and the heat-accumulating burner quantity of 2 groups is identical, concrete quantity is by the specification size decision of sintering machine, and every group has 3 heat-accumulating burners in the present embodiment.Each heat-accumulating burner all adopts steel construction shell 24, has built heat-insulation layer 26 all around by laying bricks or stones, and the casing that forms in the heat-insulation layer is filled heat storage 25, and the bottom is for communicating with igniting section 2 burner hearths and being the spout 27 at certain inclination angle with the burner hearth perpendicular bisector.Heat-insulation layer 26 preferably adopts clay to pour into a mould in conjunction with lightening casting material, and spout 27 preferably adopts the low cement deposit material of high alumina matter integrated poured, and heat storage 25 preferably adopts the ceramic honeycomb body to build up.The connecting branch road of each heat-accumulating burner upper side is communicated with the total pipeline 5 that is connected of this group heat-accumulating burner, 2 groups of heat-accumulating burners connection total pipeline 5 separately is connected with 2 interfaces of two-position four way change valve 6 respectively, and 2 interfaces in addition of two-position four way change valve 6 connect with the smoke evacuation collector that is connected air-introduced machine 8 and chimney 15 with treating preheated air or low-heat value gas input channel 9 respectively.Low-heat value gas or air are directly sent into some straight tubes 18 on igniting section 2 furnace roofs by pipeline 12, spray in burner hearth through straight tube 18, and every straight tube is between the symmetrical in twos heat-accumulating burner of 2 heat-accumulating burner groups.In actual motion, air-introduced machine 8 is extracted a certain amount of high-temperature gas through total connecting pipe 5 and each heat-accumulating burner of heat-accumulating burner group 4 out by reversal valve 6 from the burner hearth of igniting section 2, high-temperature gas is by heat storage 25 time, a large amount of heats are absorbed by heat storage, regenerator temperature is reached more than 1100 ℃, and, discharge from chimney 15 again by regulating extraction exhaust gas volumn control flue gas discharge temperature less than 150 ℃; Simultaneously, in the pipeline 9 air of input by reversal valve 6 through heat-accumulating burner group 3 by each heat-accumulating burner in heat storage 25 preheatings of accumulation of heat reach about 1000 ℃, again through heat-accumulating burner spout 27 sprays into the burner hearth of igniting section 2 with certain spray angle in, and burn while mixing with the coal gas of a plurality of straight tubes 18 ejections on pipeline 12 and igniting section 2 furnace roofs; Behind the operation certain hour, two-position four way change valve 6 is commutated by control system control by designing and calculating, and running status is changed into the air of heat-accumulating burner group 4 preheatings input, and heat-accumulating burner group 3 absorbs the heat of extracting flue gas out; Operation certain hour reversal valve commutates once more and changes the running status of 2 groups of heat-accumulating burners, and so circulation makes ignition furnace remain high furnace temperature, finishes the ore sintering igniting smoothly; When ignition furnace starts operation, make the smooth combustion of 1 heat-accumulating burner group from burner 20 ignition of igniting, the igniting furnace temperature reaches more than 800 ℃, and the operation of the burner 20 of can stop igniting enters above-mentioned burn cycle.Two-position four way change valve 6 is a pneumatic operated valve, sends instruction by industrial computer, and control system is controlled its commutation by the cylinder (all not drawing in the accompanying drawing) of executing agency.Characteristics of the present utility model are to adopt single preheating, promptly only need a kind of in preheated air and the low-heat value gas, if pipeline 9 input airs, pipeline 12 is just imported low-heat value gas (running status as mentioned above); Vice versa, and promptly pipeline 9 is imported low-heat value gas, and pipeline 12 input airs specifically need to determine according to design.Should increase a pneumatic valve 14 of cutting soon on the pipeline of input low-heat value gas, close earlier during two-position four-way valve 6 commutation and cut valve 14 soon, cut off coal gas, open again after commutation is finished and cut valve soon, with the safety that guarantees commutation process and save coal gas.On pipeline 9 and pipeline 12, be respectively arranged with electronic pipe network control valve 10 and 16, infeed the air and the gas using quantity of ignition furnace in order to adjusting and control, and measure by the orifice flowmeter 11 and 13 that is installed on the pipeline respectively.The connecting branch road that leads to each heat-accumulating burner is provided with electronic stokehold control valve 17, on the subtube of straight tube 18, also be provided with electronic stokehold control valve 19 at pipeline 12, by regulating the size of stokehold control valve 17 and 19, can control the Temperature Distribution of ignition furnace section, improve sintering quality.Between air-introduced machine 8 and two-position four-way valve 6, be provided with electronic smoking air volume regulating valve 7, should be according to the exhaust gas temperature behind the process heat storage less than 150 ℃, and hold ripe body accumulation of heat value and should be able to satisfy air or low-heat value gas are preheating to specification requirement about 1000 ℃, by regulating smoking air volume regulating valve 7, the size of control smoking amount in the ignition furnace realizes the control of air or gas preheating temperature and two-position four way change valve commutating period.In service, realize ignition furnace burning control by the various valves that are provided with in the point of adjustment stove pipe network, regulate reversal valve and cut valve realization ignition furnace commutation control soon, burning control and commutation control are all sent instruction by industrial computer by the operation sequence of design, the size of regulating the switching or the switching of each valve respectively by executing agency's (reversible electric machine or cylinder) by control system.
Claims (4)
1. low-heat value gas heat accumulating type ignition furnace of sintering machine, comprise and forming by steel construction outer wall [21] and refractory material interior wall [22], igniting section [2] that pallet [29] moves horizontally in its burner hearth and soaking zone [1], igniting section [2] and the setting of soaking zone [1] bottom walk wheel apparatus [23], the burner of igniting [20] that igniting section [2] middle part is provided with, air, the control valve and the flowmeter that are provided with respectively on the gas inlet pipe road, the industrial computer that is used for ignition furnace burning control and air or coal gas commutation control, executing agency according to industrial computer program control valve, it is characterized in that also comprising the heat-storage type burner that is provided with on the furnace roof of igniting section [2], heat-storage type burner contains heat-accumulating burner group [3] and [4] that 2 symmetric arrangement have the equal number heat-accumulating burner, each heat-accumulating burner is by steel construction shell [24], the heat-insulation layer [26] of building by laying bricks or stones around in the shell, the spout [27] that heat storage of filling in the heat-insulation layer internal box [25] and bottom are provided with is formed, be connected house steward [5] with 2 heat-accumulating burner groups that same group of each heat-accumulating burner connecting branch and stokehold control valve [17] thereof are connected respectively, four interfaces respectively with 2 heat-accumulating burner groups [3] and [4] be connected house steward [5], the two-position four way change valve [6] that a kind of combustion medium input channel [9] is connected with smoking adjustable valve [7], the air-introduced machine [8] that smoking adjustable valve [7] other end connects, chimney [15] and smoke evacuation collector thereof, the some straight tubes [18] that are communicated with another kind of combustion medium input channel [12] and the stokehold control valve [19] thereof that are provided with between symmetrical in twos heat-accumulating burner on the igniting section furnace roof are located at and cut valve soon on the gas inlet pipe road.
2. low-heat value gas heat accumulating type ignition furnace of sintering machine according to claim 1, it is characterized in that the input channel [9] that is connected with reversal valve [6] is the air input pipe, the input channel [12] that is connected with furnace roof straight tube [18] is a gas inlet pipe, perhaps the input channel [9] that is connected with reversal valve [6] is a gas inlet pipe, and the input channel [12] that is connected with furnace roof straight tube [18] is the air input pipe.
3. low-heat value gas heat accumulating type ignition furnace of sintering machine according to claim 1 and 2 is characterized in that the heat storage [25] of filling in the heat-accumulating burner internal box is the ceramic honeycomb body heat storage.
4. low-heat value gas heat accumulating type ignition furnace of sintering machine according to claim 1 and 2, the heat-insulation layer [26] that it is characterized in that heat-accumulating burner is the heat-insulation layer of clay in conjunction with the lightening casting material cast, and spout [27] is the low integrated poured spout of cement deposit material of high alumina matter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035676 CN2708125Y (en) | 2004-04-22 | 2004-04-22 | Low-heat value gas thermal storage type sintering machine ignition furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420035676 CN2708125Y (en) | 2004-04-22 | 2004-04-22 | Low-heat value gas thermal storage type sintering machine ignition furnace |
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| CN2708125Y true CN2708125Y (en) | 2005-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200420035676 Expired - Fee Related CN2708125Y (en) | 2004-04-22 | 2004-04-22 | Low-heat value gas thermal storage type sintering machine ignition furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251094A (en) * | 2011-06-24 | 2011-11-23 | 北京京诚凤凰工业炉工程技术有限公司 | Heat accumulating type soaking pit furnace capable of combusting low-calorific value coal gas |
| CN103528372A (en) * | 2013-10-18 | 2014-01-22 | 鞍山市东盛能源设备有限公司 | High-efficiency hot-wind low-temperature sintering-machine ignition furnace device |
| CN104006403A (en) * | 2014-05-29 | 2014-08-27 | 马钢(集团)控股有限公司 | Gas diluting device and gas diluting method |
| CN109556405A (en) * | 2019-01-16 | 2019-04-02 | 大峘集团有限公司 | A kind of dual-purpose sintering ignition furnace of energy-saving coal dust gas |
-
2004
- 2004-04-22 CN CN 200420035676 patent/CN2708125Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251094A (en) * | 2011-06-24 | 2011-11-23 | 北京京诚凤凰工业炉工程技术有限公司 | Heat accumulating type soaking pit furnace capable of combusting low-calorific value coal gas |
| CN102251094B (en) * | 2011-06-24 | 2013-02-13 | 北京京诚凤凰工业炉工程技术有限公司 | Heat accumulating type soaking pit furnace capable of combusting low-calorific value coal gas |
| CN103528372A (en) * | 2013-10-18 | 2014-01-22 | 鞍山市东盛能源设备有限公司 | High-efficiency hot-wind low-temperature sintering-machine ignition furnace device |
| CN103528372B (en) * | 2013-10-18 | 2016-02-03 | 鞍山市东盛能源设备有限公司 | High-efficiency hot-wind low-temperature sintering-machine ignition furnace device |
| CN104006403A (en) * | 2014-05-29 | 2014-08-27 | 马钢(集团)控股有限公司 | Gas diluting device and gas diluting method |
| CN109556405A (en) * | 2019-01-16 | 2019-04-02 | 大峘集团有限公司 | A kind of dual-purpose sintering ignition furnace of energy-saving coal dust gas |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |