CN204901757U - Energy -concerving and environment -protective type fires natural gas list heat accumulation steel rolling heating furnace combustion system - Google Patents
Energy -concerving and environment -protective type fires natural gas list heat accumulation steel rolling heating furnace combustion system Download PDFInfo
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- CN204901757U CN204901757U CN201520688631.7U CN201520688631U CN204901757U CN 204901757 U CN204901757 U CN 204901757U CN 201520688631 U CN201520688631 U CN 201520688631U CN 204901757 U CN204901757 U CN 204901757U
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Abstract
The utility model provides an energy -concerving and environment -protective type fires natural gas list heat accumulation steel rolling heating furnace combustion system. Combustion system includes air conduit, natural gas line, flue gas pipeline, air -blower, draws the cigarette fan, air branch pipe, natural gas branch pipe, flue gas branch pipe and many to heat accumulation formula nozzle, its characterized in that: combustion system includes still that the cooling of air intake and air conduit intercommunication mixes wind in advance and is responsible for, the cooling mix in advance wind be responsible for through a plurality of coolings mix in advance the wind branch pipe respectively with the natural gas branch pipe intercommunication of every heat accumulation formula nozzle of intercommunication, mix wind in advance in the cooling and be responsible for and be equipped with the cooling and mix wind in advance and be responsible for the flowmeter and mix wind person in charge flow automatic regulating valve in advance with the cooling, it mixes in advance and swift as the wind cuts valve and nozzle cooling wind hand adjustment valve thoughtlessly in advance to be equipped with the nozzle cooling on every cooling mixes the wind branch pipe in advance. The utility model discloses a cooling mixes wind in advance and matches on -off control with natural gas flow, mixes wind in advance to the cooling and carries out flow measurement and the control of flow automatically regulated to reach the mesh of real energy -conservation.
Description
Technical field
The utility model belongs to rolling mill furnace field, specifically a kind of energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system.
Background technology
In order to the needs of energy-conserving and environment-protective, steel rolling mill uses Natural Gas Instead of Producer Gas, blast furnace gas or coke-stove gas as the fuel of heater for rolling steel, and this is present stage more common phenomenon.Use natural gas to replace coal gas, just need to replace combustion system simultaneously, general employing fires gas as single accumulation of heat heater for rolling steel combustion system.Existing combustion gas as single accumulation of heat heater for rolling steel combustion system as shown in Figure 1, comprises heat-accumulating burner, air duct, natural gas line, flue, various valve (hand-operated valve, pneumatic on-off valve, electric control valve, electromagnetic valve switch valve etc.), air blast, draws cigarette blower fan and automatic control system (wrapping control cables, instrument, instrument and industrial computer etc.).This combustion system system is by running debugging, and system reaches re-set target.
Find by following the tracks of the operation of combustion system, this combustion system imperfection, its natural gas unit consumption, heating efficiency, oxidization burning loss, and operation control aspect still has room for improvement.The key problem in technology of combustion of natural gas is the deterministic finite automata of air coefficient on the one hand, is air on the other hand and fully the mixing of combustion gas.Wherein fully mixing of air and combustion gas is the necessary condition of efficient burning, due to the inherent characteristics of combustion gas as single heat-accumulating burner, its version is subject to certain restrictions, for improving mixing of air and combustion gas, so be provided with natural gas spraying gun cooling pre-mixed air in combustion system.The uninterrupted of natural gas spraying gun cooling pre-mixed air is the key optimizing natural gas burning system, the energy-conservation and environment protecting of direct decision systems.Cooling pre-mixed air flow is less than normal, and cooling premixing effect does not reach, and the air of flow then regenerator section bigger than normal is inadequate, all combustion heat-exchange effects of influential system.Therefore, the uninterrupted of cooling pre-mixed air has a theoretially optimum value (A), in the operating process of heating furnace actual motion, will, by operating control accurately, make actual cooling premix air quantity remain on its optimal value exactly.In heating furnace actual moving process, along with production kind is different from rhythm, the flow (T) of natural gas is constantly change, corresponding with it, the theoretially optimum value A of cooling pre-mixed air also constantly changes, A=kT, k are optimum cooling pre-mixed air discharge coefficient (this k value is the core technology data of need to be keep secret, 0.2<k<1).
In existing system, natural gas spraying gun cooling pre-mixed air is in normally open, its flow does not have measure control, do not realize synchronous automatic switch with natural gas, thus cause air coefficient bigger than normal, and have half cooling pre-mixed air to have neither part nor lot in burning, cause natural gas unit consumption higher, heating efficiency is not enough, oxidization burning loss is serious, (now cools pre-mixed air and has directly become temperature-reducing medium) temperature reduce very fast when stove insulation is to be rolled.Result also in the air-fuel ratio of practical operation and the air-fuel ratio disunity of calculating equally, thus easily cause misoperation and produce the situation of over-emitting black exhaust.
Summary of the invention
The utility model provides a kind of energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system according to the deficiencies in the prior art.This Combustion System Design is natural gas spraying gun cooling pre-mixed air system independently, can realize cooling pre-mixed air and the flux matched switch control rule of natural gas flow, can carry out flow measurement and flow auto-adjustment control to cooling pre-mixed air simultaneously.
The technical scheme that the utility model provides: described one energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system, comprise air duct, natural gas line, flue, air blast, draw cigarette blower fan and multipair heat-accumulating burner, multipair heat-accumulating burner is respectively by air arm, natural gas branch pipe, flue gas arm and air duct, natural gas line, flue is communicated with, air blast and draw the air inlet that cigarette blower fan is separately positioned on air duct and flue, at air arm, natural gas branch pipe, flue gas arm is respectively equipped with burner combustion air and cuts valve soon, burner natural gas cuts valve soon, burner flue gas cuts valve soon, it is characterized in that: described combustion system also comprises the cooling pre-mixed air that air inlet is communicated with air duct and is responsible for, cooling pre-mixed air supervisor is communicated with the natural gas branch pipe being communicated with each heat-accumulating burner respectively by multiple cooling pre-mixed air arm, and cooling pre-mixed air supervisor is provided with cooling pre-mixed air main conduit flow's meter and cooling pre-mixed air main conduit flow automatic regulating valve, each cooling pre-mixed air arm is provided with burner cooling pre-mixed air and cuts valve and burner cooling pre-mixed air hand adjustment valve soon.
The further technical scheme of the utility model: described combustion system also comprises automatic control system, automatic control system comprises instrument, instrument, controller and control cables, the signal output part of described cooling pre-mixed air main conduit flow meter is connected with the signal input part of automatic control system, automatic control system signal output part cuts valve soon with burner combustion air respectively, burner natural gas cuts valve soon, burner flue gas cuts valve soon, cool pre-mixed air main conduit flow automatic regulating valve and burner cools the signal input part that pre-mixed air cuts valve soon and be connected.
The utility model is technical scheme preferably: described cooling pre-mixed air main conduit flow meter is arranged on cooling pre-mixed air supervisor near one end of air inlet, and cooling pre-mixed air main conduit flow automatic regulating valve is arranged on the rear of cooling pre-mixed air main conduit flow meter near one end of cooling pre-mixed air arm.
The utility model is technical scheme preferably: described burner cooling pre-mixed air hand adjustment valve is arranged on cooling pre-mixed air arm near the one end is connected with natural gas branch pipe, burner cooling pre-mixed air cut soon valve be arranged on cooling pre-mixed air arm near with cool pre-mixed air and be responsible for the one end be connected; Described burner natural gas is cut valve soon and is arranged on natural gas branch pipe near the one end be connected with natural gas line.
The burner of combustion gas as single accumulation of heat heater for rolling steel combustion system described in the utility model is arranged in pairs, often pair of burner is within a commutation cycle, one of them burner is for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by another burner by the high-temperature flue gas of generation; By commutation, next cycle, another burner is for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by first burner.Heat storage is had in burner, between the main combustion period of burner, cold combustion air and high-temperature thermal storage body heat exchange, combustion air temperature enters burner hearth after improving (reaching about 1000 DEG C), and regenerator temperature declines (reaching about 200 DEG C) simultaneously; In the smoke evacuation cycle of burner, the high-temperature flue gas in burner hearth and cold heat storage heat exchange, regenerator temperature improves, and (reach about 1050 DEG C, high-temperature flue-gas declines (reaching about 150 DEG C) by drawing outside cigarette blower fan discharge factory building simultaneously.
The utility model is drawn one for airduct be in charge of from total, namely cools pre-mixed air supervisor, and this supervisor provides cooling pre-mixed air for all burners.And motor valve, flow measurement orifice plate are set on cooling pre-mixed air supervisor, signal introduces operating system, to automatically adjust control to flow; Before each burner, be provided with cooling pre-mixed air arm, and on each arm, arrange automatic switch valve (can be magnetic valve or pneumatic cut valve etc. soon), manual modulation valve, the signal of automatic switch valve is introduced operating system and is carried out automatic switch control.Achieve cooling pre-mixed air and the flux matched switch control rule of natural gas flow, carry out flow measurement and flow and automatically regulate cooling pre-mixed air and control, thus reach really energy-conservation object.
Accompanying drawing explanation
Fig. 1 is existing combustion system schematic diagram;
Fig. 2 is combustion system schematic diagram described in the utility model.
In figure: 1-air duct, 1-1-air arm, 2-natural gas line, 2-1-natural gas branch pipe, 3-flue, 3-1-flue gas arm, 4-air blast, 5-draw cigarette blower fan, 6-heat-accumulating burner, 7-burner helps right air to cut valve soon, 8-burner natural gas cuts valve soon, 9-burner flue gas cuts valve soon, 10-cooling pre-mixed air main conduit flow meter, 11-cooling pre-mixed air main conduit flow automatic regulating valve, 12-burner cooling pre-mixed air cuts valve soon, 13-burner cooling pre-mixed air hand adjustment valve, 14-cooling pre-mixed air supervisor, 14-1-cooling pre-mixed air arm, 15-steel billet admission passage, 16-cooling pre-mixed air enters pipe.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further illustrated.The energy saving and environment friendly combustion gas as single of one as shown in Figure 2 accumulation of heat heater for rolling steel combustion system, comprise air duct 1, natural gas line 2, flue 3, air blast 4, draw cigarette blower fan 5 and multipair heat-accumulating burner 6, the burner of combustion gas as single accumulation of heat heater for rolling steel combustion system is arranged in pairs, often pair of burner is within a commutation cycle, one of them burner is for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by another burner by the high-temperature flue gas of generation; Each heat-accumulating burner 6 is communicated with air duct 1, natural gas line 2, flue 3 respectively by air arm 1-1, natural gas branch pipe 2-2, flue gas arm 3-1, air blast 4 and draw the air inlet that cigarette blower fan 5 is separately positioned on air duct 1 and flue 3, air is provided by air duct 1, natural gas line 2 supplies natural gas, and flue 3 gets rid of flue gas; Conveniently control, each air arm 1-1, natural gas branch pipe 2-2, flue gas arm 3-1 are respectively equipped with burner combustion air cuts valve 7 soon, burner natural gas cuts valve 8 soon, burner flue gas cuts valve 9 soon.
As shown in Figure 2, described combustion system also comprises the cooling pre-mixed air that air inlet is communicated with air duct 1 and is responsible for 14, cooling pre-mixed air supervisor 14 is communicated with the natural gas branch pipe 2-2 being communicated with each heat-accumulating burner 6 respectively by multiple cooling pre-mixed air arm 14-1, cooling pre-mixed air supervisor 14 is provided with cooling pre-mixed air main conduit flow and counts 10 and cooling pre-mixed air main conduit flow automatic regulating valve 11, described cooling pre-mixed air main conduit flow counts 10 and is arranged on cooling pre-mixed air supervisor 14 near one end of air inlet, cooling pre-mixed air main conduit flow automatic regulating valve 11 is arranged on cooling pre-mixed air main conduit flow and counts the rear of 10 near one end of cooling pre-mixed air arm 14-1, each cooling pre-mixed air arm 14-1 is provided with burner cooling pre-mixed air and cuts valve 12 and burner cooling pre-mixed air hand adjustment valve 13 soon, described burner cooling pre-mixed air hand adjustment valve 13 is arranged on cooling pre-mixed air arm 14-1 near the one end is connected with natural gas branch pipe 2-2, burner cooling pre-mixed air cut soon valve 12 be arranged on cooling pre-mixed air arm 14-1 near with cool pre-mixed air and be responsible for 8 one end be connected, described burner natural gas is cut valve 8 soon and is arranged on natural gas branch pipe 2-2 near the one end be connected with natural gas line 2.Cooling pre-mixed air and the flux matched switch control rule of natural gas flow can be realized, flow measurement and flow auto-adjustment control can be carried out to cooling pre-mixed air simultaneously.
Can automatically control to make the combustion system in the utility model, described combustion system also comprises automatic control system, automatic control system comprises instrument, instrument, controller and control cables, described cooling pre-mixed air main conduit flow counts the signal output part of 10 and is connected with the signal input part of automatic control system, and the signal output part of automatic control system helps that right air cuts valve 7 soon, burner natural gas cuts valve 8 soon, burner flue gas cuts valve 9 soon respectively with burner, cool pre-mixed air main conduit flow automatic regulating valve 11 and burner cools the signal input part that pre-mixed air cuts valve 12 soon and be connected.Automatically control that burner helps that right air cuts valve 7 soon, burner natural gas cuts valve 8 soon, burner flue gas cuts valve 9 soon by automatic control system, cooling pre-mixed air main conduit flow automatic regulating valve 11 and burner cool pre-mixed air and cut valve 12 soon.
Burner of the present utility model is arranged in pairs, as shown in Figure 2, burner N1 and burner S1 is a pair, burner N2 and burner S2 is a pair, burner Nn and burner Sn is a pair, within a commutation cycle, burner N1, N2, Nn are for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by another burner S1, S2, Sn by the high-temperature flue gas of generation; By commutation, next cycle, burner S1, S2, Sn are for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by burner N1, N2, Nn.Heat storage is had in burner, between the main combustion period of burner, cold combustion air and high-temperature thermal storage body heat exchange, combustion air temperature enters burner hearth after improving (reaching about 1000 DEG C), and regenerator temperature declines (reaching about 200 DEG C) simultaneously; In the smoke evacuation cycle of burner, the high-temperature flue gas in burner hearth and cold heat storage heat exchange, regenerator temperature improves, and (reach about 1050 DEG C, high-temperature flue-gas declines (reaching about 150 DEG C) by drawing outside cigarette blower fan discharge factory building simultaneously.
During the utility model specific works, when heat-accumulating burner Si (i=1 ~ n) is combustion period, when corresponding heat-accumulating burner Ni (i=1 ~ n) is for the smoke evacuation cycle, the burner be communicated with on the air arm 1-1 of burner Si helps the right air burner natural gas cut soon on valve 7, the natural gas branch pipe 2-1 burner cooling pre-mixed air cut soon on valve 8 and cooling pre-mixed air arm 14-1 to cut valve 12 soon and automatically opens, and the burner flue gas be communicated with on the flue gas arm 3-1 of burner Si is cut valve 9 soon and automatically closed; The burner be communicated with on the air arm 1-1 of burner Ni helps the right air burner natural gas cut soon on valve 7, the natural gas branch pipe 2-1 burner cooling pre-mixed air cut soon on valve 8 and cooling pre-mixed air arm 14-1 to cut valve 12 soon and automatically closes, and the burner flue gas be communicated with on the flue gas arm 3-1 of burner Ni is cut valve 9 soon and automatically opened; Now burner Si is for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by burner Ni by the high-temperature flue gas of generation.
When heat-accumulating burner Ni (i=1 ~ n) is combustion period, when corresponding heat-accumulating burner Si (i=1 ~ n) is for the smoke evacuation cycle, the burner be communicated with on the air arm 1-1 of burner Ni helps the right air burner natural gas cut soon on valve 7, the natural gas branch pipe 2-1 burner cooling pre-mixed air cut soon on valve 8 and cooling pre-mixed air arm 14-1 to cut valve 12 soon and automatically opens, and the burner flue gas be communicated with on the flue gas arm 3-1 of burner Ni is cut valve 9 soon and automatically closed; The burner be communicated with on the air arm 1-1 of burner Si helps the right air burner natural gas cut soon on valve 7, the natural gas branch pipe 2-1 burner cooling pre-mixed air cut soon on valve 8 and cooling pre-mixed air arm 14-1 to cut valve 12 soon and automatically closes, and the burner flue gas be communicated with on the flue gas arm 3-1 of burner Si is cut valve 9 soon and automatically opened; Now burner Ni is for natural gas and combustion air mixed combustion in burner hearth, and flue gas is discharged by burner Si by the high-temperature flue gas of generation.
N in the utility model is fully-decentralized control to burner.That is, the combustion switch that can control separately any pair burner switches.
Claims (4)
1. an energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system, comprise air duct (1), natural gas line (2), flue (3), air blast (4), draw cigarette blower fan (5) and multipair heat-accumulating burner (6), multipair heat-accumulating burner (6) is respectively by air arm (1-1), natural gas branch pipe (2-1), flue gas arm (3-1) and air duct (1), natural gas line (2), flue (3) is communicated with, air blast (4) and draw the air inlet that cigarette blower fan (5) is separately positioned on air duct (1) and flue (3), at air arm (1-1), natural gas branch pipe (2-1), flue gas arm (3-1) is respectively equipped with burner and helps right air to cut valve (7) soon, burner natural gas cuts valve (8) soon, burner flue gas cuts valve (9) soon, it is characterized in that: described combustion system also comprises the cooling pre-mixed air that air inlet is communicated with air duct (1) and is responsible for (14), cooling pre-mixed air supervisor (14) is communicated with the natural gas branch pipe (2-1) being communicated with each heat-accumulating burner (6) respectively by multiple cooling pre-mixed air arm (14-1), and cooling pre-mixed air supervisor (14) is provided with cooling pre-mixed air main conduit flow's meter (10) and cooling pre-mixed air main conduit flow's automatic regulating valve (11), each cooling pre-mixed air arm (14-1) is provided with burner cooling pre-mixed air and cuts valve (12) and burner cooling pre-mixed air hand adjustment valve (13) soon.
2. energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system according to claim 1, it is characterized in that: described combustion system also comprises automatic control system, automatic control system comprises instrument, instrument, controller and control cables, the described cooling pre-mixed air main conduit flow meter signal output part of (10) is connected with the signal input part of automatic control system, the signal output part of automatic control system cuts valve (7) soon with burner combustion air respectively, burner natural gas cuts valve (8) soon, burner flue gas cuts valve (9) soon, the signal input part that cooling pre-mixed air main conduit flow's automatic regulating valve (11) cuts valve (12) soon with burner cooling pre-mixed air is connected.
3. energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system according to claim 1 and 2, it is characterized in that: described cooling pre-mixed air main conduit flow meter (10) is arranged on cooling pre-mixed air supervisor (14) one end near air inlet, cooling pre-mixed air main conduit flow's automatic regulating valve (11) is arranged on the rear of cooling pre-mixed air main conduit flow's meter (10) near one end of cooling pre-mixed air arm (14-1).
4. energy saving and environment friendly combustion gas as single accumulation of heat heater for rolling steel combustion system according to claim 1 and 2, it is characterized in that: described burner cooling pre-mixed air hand adjustment valve (13) is arranged on cooling pre-mixed air arm (14-1) near the one end be connected with natural gas branch pipe (2-1), burner cooling pre-mixed air is cut valve (12) soon and is arranged on cooling pre-mixed air arm (14-1) and is responsible near with cooling pre-mixed air one end that (8) be connected; Described burner natural gas is cut valve (8) soon and is arranged on natural gas branch pipe (2-1) near the one end be connected with natural gas line (2).
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| CN201520688631.7U CN204901757U (en) | 2015-09-08 | 2015-09-08 | Energy -concerving and environment -protective type fires natural gas list heat accumulation steel rolling heating furnace combustion system |
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| CN201520688631.7U CN204901757U (en) | 2015-09-08 | 2015-09-08 | Energy -concerving and environment -protective type fires natural gas list heat accumulation steel rolling heating furnace combustion system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650667A (en) * | 2016-03-17 | 2016-06-08 | 河南省天利工业炉有限公司 | Energy-saving regenerating furnace with gas mixed |
| CN111413049A (en) * | 2020-03-04 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | Method and device for detecting leakage of heating furnace burner quick-cutting valve |
| CN111425857A (en) * | 2020-04-16 | 2020-07-17 | 苏州鼎佳炉窑科技有限公司 | Self-diagnosis control device and method for valve in heat accumulating type burner combustion system |
-
2015
- 2015-09-08 CN CN201520688631.7U patent/CN204901757U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650667A (en) * | 2016-03-17 | 2016-06-08 | 河南省天利工业炉有限公司 | Energy-saving regenerating furnace with gas mixed |
| CN111413049A (en) * | 2020-03-04 | 2020-07-14 | 首钢京唐钢铁联合有限责任公司 | Method and device for detecting leakage of heating furnace burner quick-cutting valve |
| CN111425857A (en) * | 2020-04-16 | 2020-07-17 | 苏州鼎佳炉窑科技有限公司 | Self-diagnosis control device and method for valve in heat accumulating type burner combustion system |
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Address after: 430080 Wuhan, Hubei Qingshan District, No. thirty-one attached street, No. 2 Patentee after: Wuhan Jinding Polytron Technologies Inc Address before: 430080 Wuhan, Hubei Qingshan District, No. thirty-one attached street, No. 2 Patentee before: Wuhan Steel Group Jingding Industrial Furnace Co., Ltd. |