CN210004754U - environment-friendly energy-saving combustion equipment matched with scrap steel briquetting for preheating - Google Patents
environment-friendly energy-saving combustion equipment matched with scrap steel briquetting for preheating Download PDFInfo
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- CN210004754U CN210004754U CN201920311873.2U CN201920311873U CN210004754U CN 210004754 U CN210004754 U CN 210004754U CN 201920311873 U CN201920311873 U CN 201920311873U CN 210004754 U CN210004754 U CN 210004754U
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Abstract
The utility model discloses an environment-friendly and energy-saving combustion equipment that supporting steel scrap briquetting preheated of , including preheating furnace body and preheating furnace platform truck, the operation of preheating furnace platform truck is on the track that the preheating furnace body was laid, and the pile up neatly has the steel scrap briquetting on the preheating furnace platform truck, the preheating furnace body divide into two sections, is preheating section, heating heat preservation section respectively, and the preheating furnace body of preheating section and heating heat preservation section installs coal gas heat accumulation formula nozzle, air heat accumulation formula nozzle and ignition nozzle the utility model provides an environment-friendly and energy-saving combustion equipment that supporting steel scrap briquetting was preheated installs the incomplete oxygen analysis appearance of high temperature bleeder, can ensure that high temperature organic matter volatilizees the burning completely, and furnace temperature detection thermocouple effectively cooperates with empty, coal gas heat supply governing valve, ensures that the temperature is stable or slightly undulant in the settlement range, and installation furnace pressure detects differential pressure transmitter and smoke exhaust control valve, real-time automatically regulated furnace pressure, guarantees the stability of burning.
Description
Technical Field
The utility model relates to the technical field of steel making, in particular to an environment-friendly and energy-saving combustion device for preheating matched scrap steel pressing blocks.
Background
If the scrap steel briquette is preheated to the temperature of 700-; but also can shorten the smelting time, reduce the oxidation of the scrap steel in the furnace, greatly reduce the amount of discharged smoke and dust, reduce the operation load of dust removing equipment and have better environmental protection and energy saving benefits.
Because the scrap steel pressed blocks inevitably contain a small amount of organic matters, such as paint, grease, plastics and the like, particularly scrap steel pressed blocks made of light and thin materials contain more paint and the like, in order to save fuel and reduce the exhaust gas temperature, a conventional combustion technology is adopted and a longer non-heat supply section or an air heat exchanger must be configured, so that two problems can be caused, various organic matters in cannot be completely combusted, a large amount of organic matters are volatilized in the non-heat supply section and then discharged into the atmosphere along a chimney, or mixed dust adheres to the wall surface of the heat exchanger to influence heat exchange, in addition, in , gaseous organic matters in the flue gas form a small amount of toxic substances such as dioxin and the like in a low-temperature section, so that the atmospheric environment can be seriously polluted, an effective low-cost flue gas purification treatment system is not available at present, and environment-friendly and energy-saving combustion equipment matched with scrap.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an environmental protection and energy saving combustion equipment that kinds of supporting steel scrap briquetting preheated to in proposing steel scrap briquetting treatment process in solving above-mentioned background art, the burning of a small amount of organic matters that contain can produce the problem of highly toxic material polluted atmosphere environment.
In order to achieve the purpose, the technical scheme includes that environment-friendly energy-saving combustion equipment matched with preheating of waste steel press blocks comprises a preheating furnace body and a preheating furnace trolley, wherein the preheating furnace trolley runs on a track set in the preheating furnace body, a preheating furnace matched combustion system is assembled between the preheating furnace body and the preheating furnace trolley, waste steel press blocks are stacked on the preheating furnace trolley, the preheating furnace body is divided into two sections which are respectively a preheating section and a heating and heat preservation section, gas heat accumulating type burners, air heat accumulating type burners and ignition burners are installed on the walls of two sides of the preheating furnace body of the preheating section and the heating and heat preservation section, a third air gas burner nozzle and an air gas heat accumulating type horizontal combustion channel are installed in the preheating furnace body of the preheating section, the air gas horizontal combustion channel enables air to be two-position flame, a second air gas burner nozzle and an air gas inclined combustion channel are installed in the preheating furnace body of the heating and the air heat accumulating type burners to enable the air heat accumulating type burners to be two-position flame, the air heat accumulating type burners and the air heat preservation burners to be inclined combustion channels enable the air flame to be two-position flame-position flame to be formed by connecting an air regulating valve, a three induced draft fan, a.
Preferably, the preheating furnace trolley is of a strip-shaped rectangular structure.
Preferably, 1-2 sets of high-temperature air extraction type residual oxygen analyzers are arranged on the furnace top of the preheating furnace body where the preheating section, the heating section of the heating and heat preservation section and the heat preservation section of the heating and heat preservation section are located, sets of furnace pressure detection micro differential pressure transmitters are arranged, 6-9 furnace temperature detection thermocouples are respectively arranged on the furnace top and two sides of the preheating furnace body where the preheating section, the heating section of the heating and heat preservation section and the heat preservation section of the heating and heat preservation section are located, and the high-temperature air extraction type residual oxygen analyzers, the furnace pressure detection micro differential pressure transmitters and the furnace temperature detection thermocouples are located on the central line of the preheating furnace body.
Preferably, the furnace top of the preheating furnace body is built by adopting a full-fiber structure, the side wall of the preheating furnace body is built by adopting high-alumina bricks and is in a heat-insulating material structure, and the height between the furnace top of the preheating furnace body and the scrap steel pressing block is 1.4-1.8.
Preferably, the coal gas heat accumulating type burner, the air heat accumulating type burner, the th air gas heat accumulating type burner nozzle and the second air gas heat accumulating type burner nozzle are built at the set position of the side wall of the preheating furnace body by adopting a composite structure of low-cement pouring materials.
Preferably, the scrap steel briquettes are stacked on the preheating furnace trolley according to a set material distribution mode.
Preferably, the air heat accumulating type burner and the coal gas heat accumulating type burner are of an upper and lower combined structure, and are asymmetrically and alternately arranged on the two side walls of the preheating furnace body.
Preferably, the intersection angle of the th air gas heat accumulating type burner nozzle of the preheating section is horizontal, the flame is in a horizontal state, the upper burner of the th air gas heat accumulating type burner nozzle is a gas heat accumulating burner, the lower burner is an air heat accumulating burner, the intersection angles of the air flow of the heating section of the heating and heat preservation section and the second air gas heat accumulating type burner nozzle of the heat preservation section of the heating and heat preservation section are inclined downwards, the nozzles correspond to the gaps of the scrap steel pressing blocks, the upper burner is an air heat accumulating burner, and the lower burner is a gas heat accumulating burner.
Compared with the prior art, the utility model has the advantages that the utility model provides an environmental protection and energy saving type combustion equipment that supporting steel scrap briquetting preheats, high temperature bleeder residual oxygen analyzer monitors the interior residual oxygen volume of flue gas in real time, guarantee definite residual oxygen proportion in the flue gas, guarantee that high temperature organic matter volatilizees and burns completely, furnace temperature detection thermocouple effectively cooperates with empty, coal gas heat supply governing valve, guarantee that the heat preservation section of preheating section, heating heat preservation section and heating heat preservation section is stable or slight fluctuation in the settlement scope, heating heat preservation section furnace temperature sets up above 850 ℃, the characteristics of regenerative combustion and air gas regenerative burner adopt asymmetric dislocation arrangement, can block the synthesis of virulent material dioxin, adopt two tee bend valves of coal gas and air, only two sets of reversing burner burning during the switching-over, the influence to the furnace pressure is less, install furnace pressure detection differential pressure transducer and smoke exhaust adjusting valve, according to furnace pressure feedback signal, real-time automatically adjust the furnace pressure, in order to guarantee the stability of burning, the whole combustion stability, the organic matter can burn completely, can prevent burning to produce poisons such as dioxin.
Drawings
FIG. 1 is a schematic view of the overall structure of a preheating furnace body of the present invention;
FIG. 2 is a schematic cross-sectional view of a preheating section of the present invention;
FIG. 3 is a schematic cross-sectional view of the heating and heat-preserving section of the present invention;
fig. 4 is a diagram of a combustion control system of the present invention.
In the figure, the device comprises a preheating furnace body 1, a preheating furnace trolley 2, a scrap steel pressing block 3, a coal gas heat accumulating type burner 4, an air heat accumulating type burner 5, an ignition burner 6, an air coal gas heat accumulating type burner nozzle 7 and , an air coal gas horizontal combustion channel 8, a second air coal gas heat accumulating type burner nozzle 9, an air coal gas inclined combustion channel 10, an air coal gas inclined combustion channel 11, an air side induced draft fan 12, a coal gas side induced draft fan 13, an air and coal gas heat supply regulating valve 14, a combustion-supporting air blower 15, a coal gas main pipe 16, a coal gas two-position three-way reversing valve 17, an air three-way reversing valve 18, a smoke exhaust regulating valve 19, a high-temperature extraction type residual oxygen analyzer 20, a furnace pressure detection micro-differential pressure transmitter 21 and a furnace temperature detection thermocouple.
Detailed Description
The technical solution in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of , but not all embodiments.
The environment-friendly energy-saving combustion equipment comprises a preheating furnace body 1 and a preheating furnace trolley 2, wherein the preheating furnace trolley 2 runs on a track set in the preheating furnace body 1, a preheating furnace supporting combustion system is arranged between the preheating furnace body 1 and the preheating furnace trolley 2, a waste steel briquette 3 is stacked on the preheating furnace trolley 2 according to a set distribution mode, the waste steel briquette 3 is conveniently dismounted, the furnace top of the preheating furnace body 1 is built by a full-fiber structure, the side wall of the preheating furnace body 1 adopts a high-alumina brick building and heat preservation material structure, the height between two positions of a stacking waste steel briquette 3 of the preheating furnace body 1 and a heat supply furnace top is between 1.4-1.8, a formed space is a combustion space, the preheating furnace body 1 is divided into two sections, the preheating section and a heating heat preservation section, the preheating section and the preheating furnace body 1 are respectively a heat extraction nozzle 17, the preheating section and the preheating furnace body 1 of the preheating section and the preheating furnace body 1 of the heating furnace body are respectively connected with a heat preservation section, the preheating furnace body 1, a heat preservation furnace body is connected with a heat preservation nozzle 16, a heat exchange gas burner, a heat exchange gas analyzer is arranged on the heating burner, a heat exchange gas burner nozzle 16 is arranged on the heat exchange gas pipeline, a heat exchange gas exchange.
environment-friendly energy-saving combustion process for preheating matching scrap steel briquettes, which comprises the following steps:
, stacking the scrap steel briquettes 3 on the preheating furnace trolley 2 outside the furnace according to a set material distribution mode to prepare to enter the furnace, wherein the preheating furnace trolley 2 adopts a strip-shaped rectangular structure, so that the scrap steel briquettes 3 can be conveniently stacked on the preheating furnace trolley 2 according to the set material distribution mode, and the trolley feeds cars from the charging end of the preheating furnace and simultaneously discharges cars from the discharging end according to a set discharging rhythm to realize circular charging and discharging;
secondly, a trolley enters the furnace through a furnace opening under pressure, an air heat accumulating type burner 5 and a gas heat accumulating type burner 4 in a preheating section heat a waste steel pressing block 3 on the trolley, because the waste steel pressing block 3 just entering the furnace is at normal temperature, in order to ensure the stable combustion of the heat accumulating type burner, flame is controlled above the waste steel pressing block 3, the flame directly erodes the waste steel pressing block 3 less, meanwhile, the furnace temperature at the upper part of the preheating section is controlled at 850-950 ℃, through the combustion, organic matters such as paint, grease and the like contained on the surface of the waste steel pressing block 3 can be gasified and volatilized, the volatilized organic matters are quickly combusted through oxygen-enriched combustion (air and gas heat supply regulating valve 13 is adjusted to improve the air proportion), the volatilized organic matters are burnt out, the air heat accumulating type burner 5 and the gas heat accumulating type burner 4 in the preheating section are ignited by an ignition burner 6, the cold waste steel pressing block 3 just entering the furnace is heated, in order to ensure the stable combustion, the flame is controlled above the waste steel pressing block 3, the full combustion of the volatile matters on the surface of the waste;
the third step: according to the production rhythm requirement, the trolley loaded with the preheated scrap steel pressing block 3 sequentially enters a heating and heat preservation section, flames sprayed by an air heat accumulation type burner 5 and a gas heat accumulation type burner 4 of the section pass through the gap of the scrap steel pressing block 3 in an inclined shape at a high speed, the furnace temperature of the heating and heat preservation section is controlled to be 800-; because organic matters still exist on the surface of a part of the waste steel pressing block 3 to volatilize, the combustion still adopts oxygen-enriched combustion, the volatilized organic matters are quickly combusted to completely heat the air heat accumulating type burner 5 and the coal gas heat accumulating type burner 4 of the heat preservation section, flames sprayed by the air heat accumulating type burner 5 and the coal gas heat accumulating type burner 4 pass through the gap of the waste steel pressing block 3 in an inclined shape at a high speed through the air coal gas inclined combustion channel 10, the furnace temperature of the heat preservation section is controlled at 950 ℃ with the addition of 800 ℃, and the surface temperature of the waste steel pressing block 3 is quickly increased to 850 ℃;
and fourthly, after the temperature is raised in the third step, the surface temperature and the depth-determined temperature of the waste steel pressing block 3 basically reach above 800 ℃, when the central temperature of the waste steel pressing block 3 is also between 250 ℃ and 400 ℃, the organic matters contained in the waste steel pressing block 3 are basically burnt and volatilized completely, and simultaneously the heat absorption capacity of the waste steel pressing block 3 is quickly reduced, because 800 ℃ is the starting point of the quick oxidation burning loss of the steel billet, in order to reduce the oxidation burning loss of the waste steel pressing block 3 due to the large specific surface area of the waste steel pressing block 3, the regenerative gas burner 4 is controlled to reduce the gas conveying, the heat supply capacity of the burner is greatly reduced, the furnace temperature is reduced to 800 ℃ and 900 ℃, the air regenerative burner 5 is controlled to reduce the air conveying, the excess coefficient of the air in the furnace is reduced, so that the extremely weak oxidizing or reducing atmosphere is formed in the furnace, the oxidation burning loss of the waste steel pressing block 3 is reduced, the heat supply capacity of the burner is reduced, the temperature in the furnace is maintained at 900 ℃, the furnace temperature of 800 ℃ and the furnace is maintained at 900 ℃, the temperature of the central temperature of the waste steel pressing block 3 is increased after the temperature is raised in the third step, the temperature of the waste steel pressing block 3 reaches above ℃, the basic temperature of the regenerative gas pressing block 3, the center temperature is controlled to reduce the gas conveying of the coal gas conveying temperature, the coal gas conveying is reduced, the coal gas conveying temperature of the 800 ℃ and the coal gas.
The environment-friendly energy-saving combustion equipment for preheating the waste steel briquettes is characterized in that 1-2 sets of high-temperature air extraction type residual oxygen analyzers 19 are arranged on the top of a preheating furnace body 1 of a preheating section, a heating section of a heating and heat preservation section and a heat preservation section of the heating and heat preservation section, the residual oxygen amount of the flue gas in the furnace is monitored in real time, -set residual oxygen proportion in the flue gas is ensured to be completely volatilized and completely, in the preheating section, an air regenerative burner 5 and a gas regenerative burner 4 are horizontally sprayed into the furnace, the gas regenerative burner 4 is arranged at the lower part, the volatile matter is enabled to be in high-efficiency and comprehensive contact with combustion-supporting high-temperature air, a air gas regenerative burner nozzle 7 is low in outlet flow speed, dispersion combustion is formed in the furnace, the flue gas is enabled to stay for more than 2s in the furnace, the air regenerative burner 5 and the gas regenerative burner 4 are obliquely sprayed into a gap of the waste steel briquettes 3 in the heating and heat preservation section, the air regenerative burner 4 is enabled to be in the upper part, the air regenerative burner 4 is enabled to be in the gap, the air regenerative burner 4, the air is enabled to be in a mode, the direct contact with combustion-supporting high-temperature combustion air and combustion-supporting high-oxygen-enriched combustion-enriched air, the waste steel briquettes 3 is enabled to be in a temperature-enriched combustion-heated and be enabled to be.
To sum up, the utility model provides a supporting environmental protection and energy saving type combustion equipment that steel scrap briquetting preheated, high temperature bleeder residual oxygen analyzer 19, real-time supervision stove interior flue gas residual oxygen volume, guarantee definite residual oxygen proportion in the flue gas, guarantee that high temperature organic matter volatilizees and burns completely, stove temperature detection thermocouple 21 and empty, gas heat supply governing valve 13 effective cooperation, guarantee that the heating section of preheating section, heating heat preservation section and the heat preservation section of heating heat preservation section are stable or slight fluctuation in the settlement scope, heating heat preservation section furnace temperature sets up above 850 ℃ and air heat accumulation formula nozzle 5 and gas heat accumulation formula nozzle 4 adopt asymmetric dislocation arrangement, can prevent to synthesize virulent material dioxin, adopt two tee bend valves of gas 16 and air 17, only two sets of nozzles switching combustion during the switching-over, influence to the furnace pressure is less, install stove pressure detection micro differential pressure transmitter 20 and smoke exhaust regulating valve 18, according to the stove pressure feedback signal, real-time automatically regulated furnace pressure, in order to guarantee the stability of burning, overall combustion stability is good, the organic matter can completely burn, can prevent to produce the poisonous substance.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
- The environment-friendly energy-saving combustion equipment comprises a preheating furnace body (1) and a preheating furnace trolley (2), and is characterized in that the preheating furnace trolley (2) runs on a track set in the preheating furnace body (1), a preheating furnace matched combustion system is assembled between the preheating furnace body (1) and the preheating furnace trolley (2), waste steel press blocks (3) are stacked on the preheating furnace trolley (2), the preheating furnace body (1) is divided into two sections which are respectively a preheating section and a heating and heat preservation section, a coal gas heat accumulating type burner (4), an air heat accumulating type burner (5) and an ignition burner (6) are installed on the walls on the two sides of the preheating furnace body (1) of the preheating section and the heating and heat preservation section, a third air gas burner nozzle (7) and an air gas horizontal combustion channel (8) are installed in the preheating furnace body (1) of the preheating section, the air gas horizontal combustion channel (8) enables air to be burned by the air to be in a horizontal flame, a state, a second air gas burner nozzle (7) and an air burner nozzle (8) are installed in the preheating furnace body (1) of the preheating furnace body of the preheating section, the preheating furnace, the air burner nozzle is connected with a heat-accumulating type coal gas burner nozzle (13) corresponding to a heat-supply three inclined gas reversing gas inlet side of a heat-supply three-gas-supply three-gas-induced draft fan (13) through three-induced draft fan (13) and three inclined three air three-induced draft fan three-gas-induced draft fan-gas-induced draft fan-gas-induced-gas three-induced-gas-induced draft fan-induced-gas three-gas-induced draft fan-induced-gas.
- 2. The environment-friendly energy-saving combustion equipment for preheating kinds of matching scrap steel briquettes of claim 1, wherein the preheating furnace trolley (2) is of a strip-shaped rectangular structure.
- 3. The environment-friendly and energy-saving combustion equipment matched with scrap steel briquetting preheating of claim 1, wherein the top of the preheating furnace body (1) where the preheating section, the heating section of the heating and heat preservation section and the heat preservation section of the heating and heat preservation section are located is provided with 1-2 sets of high-temperature air extraction type residual oxygen analyzers (19), sets of furnace pressure detection micro differential pressure transmitters (20) are arranged, the top and two sides of the preheating furnace body (1) where the preheating section, the heating section of the heating and heat preservation section and the heat preservation section of the heating and heat preservation section are located are respectively provided with 6-9 furnace temperature detection thermocouples (21), and the high-temperature air extraction type residual oxygen analyzers (19), the furnace pressure detection micro differential pressure transmitters (20) and the furnace temperature detection thermocouples (21) are all located on the central line of the preheating furnace body (1).
- 4. The environment-friendly and energy-saving combustion equipment for preheating the kinds of matched scrap steel briquettes according to claim 1, wherein the top of the preheating furnace body (1) is built by adopting a full-fiber structure, the side wall of the preheating furnace body (1) is built by adopting high-alumina bricks and is made of a heat-insulating material structure, and the height between the top of the preheating furnace body (1) and the scrap steel briquettes (3) is 1.4-1.8.
- 5. The environment-friendly and energy-saving combustion equipment for preheating of matching scrap steel briquettes of claim 1, wherein the coal gas heat accumulating type burner (4), the air heat accumulating type burner (5), the st air gas heat accumulating type burner nozzle (7) and the second air gas heat accumulating type burner nozzle (9) are built at a set position of the side wall of the preheating furnace body (1) by adopting a composite structure of low cement casting materials.
- 6. The environment-friendly and energy-saving combustion equipment for preheating kinds of matching scrap steel briquettes of claim 1, wherein the scrap steel briquettes (3) are stacked on the preheating furnace trolley (2) according to a set material distribution mode.
- 7. The kinds of environment-friendly and energy-saving combustion equipment matched with scrap steel briquetting preheating according to claim 1, wherein the air heat accumulating type burner (5) and the gas heat accumulating type burner (4) are of an upper and lower combined structure, and the air heat accumulating type burner (5) and the gas heat accumulating type burner (4) are asymmetrically and alternately arranged on two side walls of the preheating furnace body (1).
- 8. The environment-friendly and energy-saving combustion device for preheating kinds of waste steel briquettes, according to claim 1, wherein the cross angle of the air flow of the st air gas heat accumulating type burner nozzle (7) in the preheating section is horizontal, the flame is in a horizontal state, the upper burner of the th air gas heat accumulating type burner nozzle (7) is a gas heat accumulating burner, the lower burner is an air heat accumulating burner, the cross angle of the air flow of the second air gas heat accumulating type burner nozzle (9) in the heating section and the heat holding section in the heating and heat holding section is inclined downward, the nozzles correspond to the gap of the waste steel briquettes (3), the upper burner is an air heat accumulating burner, and the lower burner is a gas heat accumulating burner.
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| CN201920311873.2U CN210004754U (en) | 2019-03-12 | 2019-03-12 | environment-friendly energy-saving combustion equipment matched with scrap steel briquetting for preheating |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798764A (en) * | 2019-03-12 | 2019-05-24 | 中冶华天南京工程技术有限公司 | A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating |
| CN111944982A (en) * | 2020-09-15 | 2020-11-17 | 大连万通能源装备有限公司 | Novel energy-saving consumption-reducing continuous type cast tube annealing furnace system |
-
2019
- 2019-03-12 CN CN201920311873.2U patent/CN210004754U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798764A (en) * | 2019-03-12 | 2019-05-24 | 中冶华天南京工程技术有限公司 | A kind of the environment-friendly and energy-efficient combustion apparatus and technique of mating bundled scrap preheating |
| CN109798764B (en) * | 2019-03-12 | 2024-04-16 | 中冶华天南京工程技术有限公司 | Environment-friendly energy-saving combustion equipment and process for preheating matched scrap steel pressing blocks |
| CN111944982A (en) * | 2020-09-15 | 2020-11-17 | 大连万通能源装备有限公司 | Novel energy-saving consumption-reducing continuous type cast tube annealing furnace system |
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