CN103673591A - Evaporated cooling system of heat accumulating type rod and wire stepping furnace - Google Patents
Evaporated cooling system of heat accumulating type rod and wire stepping furnace Download PDFInfo
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- CN103673591A CN103673591A CN201310666350.7A CN201310666350A CN103673591A CN 103673591 A CN103673591 A CN 103673591A CN 201310666350 A CN201310666350 A CN 201310666350A CN 103673591 A CN103673591 A CN 103673591A
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- 238000001816 cooling Methods 0.000 title claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 230000000694 effects Effects 0.000 claims description 8
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 15
- 230000033001 locomotion Effects 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000004087 circulation Effects 0.000 description 4
- 238000005457 optimization Methods 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 3
- 230000008016 vaporization Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000000875 corresponding effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
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Abstract
The invention provides an evaporated cooling system of a heat accumulating type rod and wire stepping furnace. The evaporated cooling system comprises a steam pocket, a circulating water pump water inlet header, a circulating water pump water outlet header, four sets of fixed beam cooling loops and three sets of movable beam cooling loops, wherein the four sets of fixed beam cooling loops and the three sets of movable beam cooling loops are connected with the circulating water pump water outlet header. The movable beam cooling loops comprise two loops formed by three sections of movable supporting beams and one loop formed by two sections of movable supporting beams, and the fixed beam cooling loops comprise two loops formed by three sections of fixed supporting beams and two loops formed by two sections of fixed supporting beams. The evaporated cooling system is an improvement of an existing evaporated cooling system of the heat accumulating type rod and wire stepping furnace, through the system optimizing procedure, equipment investment of a furnace bottom circulating system and the installed capacity of the evaporated cooling circulating system are reduced, and power consumption of an industry is reduced.
Description
Technical field
The present invention relates to a kind of heating furnace, especially relate to a kind of heat accumulating type rod wire rod walking-beam furnace evaporated cooling system.
Background technology
At present China is iron and steel output big country, and steel production enterprise is energy resource consumption and discharge rich and influential family, save and reduce discharging the inevitable requirement of being not only social sustainable development, and to the Reducing Cost in Enterprises obvious effect of having increased the benefit.Vaporization Cooling just started to adopt at pusher-type furnace since the sixties in last century, and the middle and later periods nineties, walking beam heating furnace Vaporization Cooling starts to use, and through design and use for many years, had accumulated a lot of experiences.Sustainable growth due to fuel cost, regenerative combustion technology is fully used low calorie fuels blast furnace gas, recuperative heater is extensively approved and is applied in market, along with the continuous increase of construction(al)steel demand, in newly-built heating furnace, heat accumulating type rod wire rod walking beam heating furnace accounts for significant proportion.
The blank specification 150～165 * 150～165 * 10000～12000 of heat accumulating type rod wire rod walking beam heating furnace, heating efficiency 120～180t/h, 18～26 meters of furnace superintendents.Heating furnace brace summer is divided into built-in beam and walking beam, furnace bottom evaporated cooling system correspondence is divided into built-in beam cooling circuit system and walking beam cooling circuit system, the power that each circuit cools water provides by circulating pump carries out cooling, to guarantee that furnace bottom brace summer has steel billet in enough strength support stoves to carry out step motion.5 fixed support beams of rod wire rod walking-beam furnace operated by rotary motion, 4 movable supporting beams, brace summer adopts double-deck thick-walled pipe design, relies on single-column and twin columns to support, and it is cooling that twin columns connect closed circuit inlet and outlet piping, and single-column is by density contrast natural circulation cooling.
The common system connected mode in cooling each loop of vaporization is as shown in Figure 1: single-row brace summer high temperature section and low-temperature zone are cascaded and form a loop, and 5 built-in beams form 5 built-in beam cooling circuits, and 4 walking beams form 4 walking beam cooling circuits; Built-in beam cooling circuit is supplied water by built-in beam water main, and each loop arranges manual modulation valve 7, flow detector 6, and loop outlet pipe section is provided with check-valves 8; Walking beam loop is by water main, water inlet step device 4, backwater step device 5 compositions such as grade, each loop is provided with manual modulation valve 7, flow detector 6, check-valves 8 etc., loop flow and power are provided by electric circulating pump 2 or diesel cycle pump 3, and the water outlet of closed circuit flows into drum 1 through return pipe and carries out carbonated drink separation.
The function of step device is mainly the motion that coordinates walking beam, and the action of walking beam is: promote → advance → decline → retreat, and do periodic motion, this motion is that the stepping mechanism by heating furnace drives.For evaporated cooling system because pressure and temperature is higher, and periodic motion frequently, higher to the flexible joint performance requirement of step device.
Step device is mainly comprised of upper collecting chamber, gate valve, flexible unit, lower header, exhaust apparatus etc.Upper collecting chamber is fixed on the metal framework of furnace bottom machine equipment, with furnace bottom framework, does cycle movement, and lower header is fixed on furnace bottom basis.Flexible unit is the critical piece of step device, and every cover flexible unit is comprised of 3 spheric rotary joints, pipe fitting and tube connectors, relies on the rotation of 3 swivel joints to complete corresponding action.In order to reach flexible movements, steady, be provided with the devices such as guider, vibration abatement and constant force spring hanging frame thereon and realize this purpose.Swivel joint is the critical piece of flexible unit, is also key equipment.
Conventional series connection evaporated cooling system is serially connected a water beam of two sections of front and back, because the structure of each branch road water beam is basic identical, just can guarantee that the be heated thermic load of pipeline section of each loop is basic identical.Rod wire rod walking-beam furnace water trammel lattice φ 114 * 16, internal diameter φ 82, excellent wire rod walking-beam furnace water beam surface heat flow 11000kcal/ ㎡ h, evaporated cooling system operating pressure 0.8Mpa, critical cycle flow velocity 0.4m/s, flow velocity 2m/s in actual motion.Actual motion flow velocity is much larger than critical flow velocity, although can guarantee the cooling effect of water beam, loop resistance increases, systemic circulation flow increases, causing circulating, pump lift increases, flow strengthens, and plant capacity increases, and system Meteorological and operating cost are all corresponding higher.
As shown in Figure 1, before and after every row's walking beam and built-in beam, two sections of brace summers are composed in series a loop, and full stove amounts to 9 closed circuits, and loop is to return main DN250, each loop water inlet pipe and serial pipe DN100, each loop return branch DN125; Each loop arranges the manual modulation valve of a DN100, the flow detector of 1 DN100, the check-valves of 1 DN125; Before and after 4 groups of walking beam closed circuits, be provided with 1 water inlet step device and backwater step device, every cover step device is provided with 4 groups of flexible rotating assemblies, needs altogether 24 of swivel joints; Each closed circuit is set normal circulation flow 50m3/h, maximum stream flow 55m3/h; 2 electric circulating pumps, 1 diesel cycle pump, flow 495m3/h, lift 0.5Mpa.
Summary of the invention
The present invention is the improvement to existing heat accumulating type walking beam heating furnace evaporated cooling system circulation process, heat accumulating type rod wire rod walking-beam furnace after a kind of improvement evaporated cooling system is provided, adopt the present invention can effectively fall the input of the low excellent wire rod heating furnace evaporated cooling system of heat accumulating type, reduce energy consumption and operating cost.Its technical scheme is as described below:
A kind of heat accumulating type rod wire rod walking-beam furnace evaporated cooling system, comprise that connected successively drum, water circulating pump water-inlet header, water circulating pump go out water manifold, and going out with water circulating pump four groups of built-in beam cooling circuits and the three groups of walking beam cooling circuits that water manifold is connected, described walking beam cooling circuit comprises two loops that consist of 3 sections of movable supporting beams, a loop consisting of 2 sections of movable supporting beams; Described built-in beam cooling circuit comprises two loops that consist of 3 sections of fixed support beams, two loops that consist of 2 sections of fixed support beams.
Described water circulating pump water-inlet header and water circulating pump go out to be provided with between water manifold to be provided the electric circulating pump of loop flow and power and diesel cycle pump, described water circulating pump to go out water manifold to be connected with walking beam cooling circuit with built-in beam cooling circuit.
Described built-in beam cooling circuit comprises manual modulation valve, flow detector, and in loop, outlet pipe section is provided with check-valves, and the two ends of every built-in beam cooling circuit go out water manifold with water circulating pump respectively and are connected with drum.
Described walking beam loop comprises the water inlet step device of movable supporting beam front end, the backwater step device of movable supporting beam rear end, manual modulation valve, flow detector, in loop, outlet pipe section is provided with check-valves, the two ends in every walking beam loop are connected with the movable header of swivel joint group water inlet activity header and swivel joint group backwater respectively, described swivel joint group water inlet activity header and water circulating pump go out to be provided with between water manifold fixedly header of swivel joint group water inlet, between the movable header of described swivel joint group backwater and drum, be provided with fixedly header of swivel joint group backwater.
In described walking beam cooling circuit, the loop consisting of 3 sections of movable supporting beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and the loop consisting of 2 sections of movable supporting beams comprises two single-row brace summer high temperature section.
In described built-in beam cooling circuit, the loop consisting of 2 sections of fixed support beams comprises a single-row brace summer high temperature section and a single-row brace summer low-temperature zone, one of them loop consisting of 3 sections of fixed support beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and another loop comprises two single-row brace summer high temperature section and a single-row brace summer low-temperature zone.
Each is provided with 3 swivel joints described water inlet step device and backwater step device, has 18 swivel joints in described walking beam loop.
Described water circulating pump goes out water manifold and is connected with loop to return main, and described loop is connected to the water inlet of swivel joint group fixedly header and built-in beam cooling circuit to return main.
It is 385m that described electric circulating pump and diesel cycle pump provide flow
3/ h, lift 0.5Mpa.
The circular flow of described built-in beam cooling circuit or walking beam cooling circuit is 50m
3/ h-55m
3/ h.
The present invention improves the optimization of existing heat accumulating type rod wire rod walking-beam furnace evaporated cooling system, by optimization system flow process, reduce the equipment investment of the furnace bottom circulatory system and the installed capacity of evaporative cooling natural circulating system, reduce the power consumption of factory, therefore, energy-conservation the having great importance of application of the present invention to heat accumulating type rod wire rod heating furnace.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing recuperative heater;
Fig. 2 is the structural representation of heat accumulating type rod wire rod walking-beam furnace evaporated cooling system provided by the invention.
The specific embodiment
Heat accumulating type rod wire rod enters beam type heating furnace due to its combustion characteristics, the furnace temperature temperature difference from charging end to discharge end in heating furnace is not very large, the water beam that supports steel billet in stove all the time in the condition of high temperature, the thermic load deviation of each section of brace summer is very little, according to the Load Distribution situation of furnace bottom brace summer, several sections of beams of built-in beam or walking beam are together in series, each loop is being met cooling in the situation that, reduce loop quantity, also make circulating pump the colleague who guarantees enough pressure heads, flow meets circuit cools requirement.
In Fig. 1, be that to take certain 140t/h rod wire rod heating furnace be example, 20 meters of stove effective lengths, arrange 5 row's built-in beams in stove, 4 row's walking beams, and every row's built-in beam and walking beam are respectively comprised of two sections of front and back brace summer, water trammel lattice φ 114 * 20.
System after optimization as shown in Figure 2, described heat accumulating type rod wire rod walking-beam furnace evaporated cooling system comprises drum 1, water circulating pump water-inlet header 10, water circulating pump goes out water manifold 20, with go out with water circulating pump four groups of built-in beam cooling circuits and the three groups of walking beam cooling circuits that water manifold 20 is connected, described water circulating pump water-inlet header 10 and water circulating pump go out between water manifold 20 to be provided with the electric circulating pump of loop flow and power 2 and diesel cycle pump 3 are provided, described water circulating pump goes out water manifold 10 and is connected with walking beam cooling circuit with built-in beam cooling circuit, described water circulating pump goes out water manifold 10 and is connected with loop to return main DN250, described loop is connected to the water inlet of swivel joint group fixedly header 30 and built-in beam cooling circuit to return main DN250.
Described walking beam cooling circuit comprises two loops that consist of 3 sections of movable supporting beams, a loop consisting of 2 sections of movable supporting beams; Described built-in beam cooling circuit comprises two loops that consist of 3 sections of fixed support beams, two loops that consist of 2 sections of fixed support beams.Full stove amounts to 7 closed circuits.
In described walking beam cooling circuit, the loop consisting of 3 sections of movable supporting beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and the loop consisting of 2 sections of movable supporting beams comprises two single-row brace summer high temperature section.
Described walking beam loop comprises the water inlet step device 4 of movable supporting beam front end, the backwater step device 5 of movable supporting beam rear end, manual modulation valve 7, flow detector 6, at loop outlet pipe section, be provided with check-valves 8, the two ends in every walking beam loop are connected with the movable header 60 of swivel joint group water inlet activity header 40 and swivel joint group backwater respectively, described swivel joint group water inlet activity header and water circulating pump go out to be provided with between water manifold fixedly header of swivel joint group water inlet, between the movable header of described swivel joint group backwater and drum, be provided with fixedly header of swivel joint group backwater.
In described built-in beam cooling circuit, the loop consisting of 2 sections of fixed support beams comprises a single-row brace summer high temperature section and a single-row brace summer low-temperature zone, one of them loop consisting of 3 sections of fixed support beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and another loop comprises two single-row brace summer high temperature section and a single-row brace summer low-temperature zone.
Described built-in beam cooling circuit comprises manual modulation valve 7, flow detector 6, at loop outlet pipe section, is provided with check-valves 8, and the two ends of every built-in beam cooling circuit go out water manifold 20 with water circulating pump respectively and are connected with drum 1.
Every cover step device is provided with 3 groups of flexible rotating assemblies, needs altogether 18 of swivel joints; Each closed circuit is set normal circulation flow 50m3/h, maximum stream flow 55m3/h; 2 electric circulating pumps, 1 diesel cycle pump, flow 385m3/h, lift 0.5Mpa;
Relatively, the variation of system, has reduced by 2 manual modulation valves, 2 flow detectors, 2 check-valves, 6 swivel joints; Water circulating pump power is kept to 90kw/h by 110kw/h, year saving electricity consumption 120,000 kilowatt hours.
Visible, the walking-beam furnace of same lining bar wire rod of take is example, and before and after optimizing, heating furnace evaporative cooling natural circulating system equipment investment compares, and the circulatory system after optimization is than more reasonable before optimizing.
Claims (10)
1. heat accumulating type rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: comprise that connected successively drum, water circulating pump water-inlet header, water circulating pump go out water manifold, and going out with water circulating pump four groups of built-in beam cooling circuits and the three groups of walking beam cooling circuits that water manifold is connected, described walking beam cooling circuit comprises two loops that consist of 3 sections of movable supporting beams, a loop consisting of 2 sections of movable supporting beams; Described built-in beam cooling circuit comprises two loops that consist of 3 sections of fixed support beams, two loops that consist of 2 sections of fixed support beams.
2. heat accumulating type according to claim 1 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: described water circulating pump water-inlet header and water circulating pump go out to be provided with between water manifold to be provided the electric circulating pump of loop flow and power and diesel cycle pump, described water circulating pump to go out water manifold to be connected with walking beam cooling circuit with built-in beam cooling circuit.
3. heat accumulating type according to claim 1 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: described built-in beam cooling circuit comprises manual modulation valve, flow detector, in loop, outlet pipe section is provided with check-valves, and the two ends of every built-in beam cooling circuit go out water manifold with water circulating pump respectively and are connected with drum.
4. heat accumulating type according to claim 1 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: described walking beam loop comprises the water inlet step device of movable supporting beam front end, the backwater step device of movable supporting beam rear end, manual modulation valve, flow detector, in loop, outlet pipe section is provided with check-valves, the two ends in every walking beam loop are connected with the movable header of swivel joint group water inlet activity header and swivel joint group backwater respectively, described swivel joint group water inlet activity header and water circulating pump go out to be provided with between water manifold fixedly header of swivel joint group water inlet, between the movable header of described swivel joint group backwater and drum, be provided with fixedly header of swivel joint group backwater.
5. heat accumulating type according to claim 1 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: in described walking beam cooling circuit, the loop consisting of 3 sections of movable supporting beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and the loop consisting of 2 sections of movable supporting beams comprises two single-row brace summer high temperature section.
6. heat accumulating type according to claim 1 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: in described built-in beam cooling circuit, the loop consisting of 2 sections of fixed support beams comprises a single-row brace summer high temperature section and a single-row brace summer low-temperature zone, one of them loop consisting of 3 sections of fixed support beams comprises a single-row brace summer high temperature section and two single-row brace summer low-temperature zone, and another loop comprises two single-row brace summer high temperature section and a single-row brace summer low-temperature zone.
7. heat accumulating type rod wire rod walking-beam furnace evaporated cooling system according to claim 4, is characterized in that: each is provided with 3 swivel joints described water inlet step device and backwater step device, has 18 swivel joints in described walking beam loop.
8. heat accumulating type according to claim 2 rod wire rod walking-beam furnace evaporated cooling system, it is characterized in that: described water circulating pump goes out water manifold and is connected with loop to return main, described loop is connected to the water inlet of swivel joint group fixedly header and built-in beam cooling circuit to return main.
9. heat accumulating type rod wire rod walking-beam furnace evaporated cooling system according to claim 2, is characterized in that: it is 385m that described electric circulating pump and diesel cycle pump provide flow
3/ h, lift 0.5Mpa.
10. heat accumulating type rod wire rod walking-beam furnace evaporated cooling system according to claim 1, is characterized in that: the circular flow of described built-in beam cooling circuit or walking beam cooling circuit is 50m
3/ h-55m
3/ h.
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|---|---|---|---|
| CN201310666350.7A CN103673591B (en) | 2013-12-10 | 2013-12-10 | Evaporated cooling system of heat accumulating type rod and wire stepping furnace |
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| CN201310666350.7A CN103673591B (en) | 2013-12-10 | 2013-12-10 | Evaporated cooling system of heat accumulating type rod and wire stepping furnace |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104713369A (en) * | 2015-03-24 | 2015-06-17 | 山东钢铁股份有限公司 | Distributing device applied to cooling water of industrial furnace |
| CN106091713A (en) * | 2016-08-08 | 2016-11-09 | 中冶华天南京工程技术有限公司 | The residual heat combined recirculation system of heating furnace |
| CN106643187A (en) * | 2016-11-25 | 2017-05-10 | 北京京诚凤凰工业炉工程技术有限公司 | Natural circulation waste heat recovery system of pusher-type heating furnace and natural circulation evaporator |
| CN107525411A (en) * | 2017-08-09 | 2017-12-29 | 中冶华天工程技术有限公司 | Produce the walking beam furnace apparatus for vapour-cooling of superheated steam |
| CN110017693A (en) * | 2019-04-16 | 2019-07-16 | 重庆赛迪热工环保工程技术有限公司 | One kind is for evaporated cooling system in heater for rolling steel cluster |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104713369A (en) * | 2015-03-24 | 2015-06-17 | 山东钢铁股份有限公司 | Distributing device applied to cooling water of industrial furnace |
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| CN107525411B (en) * | 2017-08-09 | 2020-01-10 | 中冶华天工程技术有限公司 | Step-type heating furnace vaporization cooling device for producing superheated steam |
| CN110017693A (en) * | 2019-04-16 | 2019-07-16 | 重庆赛迪热工环保工程技术有限公司 | One kind is for evaporated cooling system in heater for rolling steel cluster |
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| Publication number | Publication date |
|---|---|
| CN103673591B (en) | 2015-07-01 |
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