CN203546170U - Galvanizing line afterheat utilizing system - Google Patents
Galvanizing line afterheat utilizing system Download PDFInfo
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- CN203546170U CN203546170U CN201320693127.7U CN201320693127U CN203546170U CN 203546170 U CN203546170 U CN 203546170U CN 201320693127 U CN201320693127 U CN 201320693127U CN 203546170 U CN203546170 U CN 203546170U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model specifically discloses a galvanizing line afterheat utilizing system, comprising a water return pipe, a gas-water heat exchanger and a gas-gas heat exchanger, wherein the gas-water heat exchanger is mounted on the main chimney flue of a reducing annealing furnace; the gas-gas heat exchanger is mounted behind the gas-water heat exchanger and in front of the heat recovery boiler of the reducing annealing furnace; the cold water outlet of the water return pipe is connected to the water return opening of the water storage tank; the water outlet of the water storage tank is connected with two circulating pumps; the outlets of the circulating pumps are connected to the water inlet of the gas-water heat exchanger; the water outlet of the gas-water heat exchanger is connected to the hot water return opening of the water return pipe through a pipeline; the gas-gas heat exchanger is connected to the inlet of the circulating fan of each drying box through a pipeline; an air door regulating device is additionally arranged at the inlet. Due to technical modification and system optimization, the flue gas afterheat of the reducing annealing furnace is recovered, the integrated energy consumption of the production line is reduced, the exhaust gas emission temperature is reduced and the pollution on the environment is reduced.
Description
Technical field
The utility model specifically discloses a kind of galvanizing line bootstrap system.
Background technology
Current galvanizing line is the large-scale galvanizing line domesticizing early mostly, entirety equipment is lower, during design, not taking into full account smoke heat energy recycles, cause present energy consumption higher than mean level (ML) of the same trade, on cost, be less competitive than private enterprise, in quality product, be less competitive than scale state owned enterprise, in recent years always in half end-of-life state.
200,000 tons of zinc-plated unit reductive annealed oven year designed capacitys, 38 tons of the maximum unit-hour outputs of CQ level product.Reductive annealed oven is the vertical type of furnace, total radiation pipe heating process.Cold-rolled steel strip is heated to annealing temperature through radiator tube, and requires insulation for some time according to steel band recrystallize, and meanwhile, the oxide compound of steel strip surface is fully reduced in N2+H2 reducing atmosphere.Body of heater is established 99 of W type radiator tubes altogether, and employing coke-oven gas is fuel, realizes the conversion of energy, 950 ℃ of the highest design temperature heating zone in stove by pre-heated burner, pulsed radiation burning.The radiator tube outlet average 750 ℃ of left and right of spent air temperture, 400 ~ 450 ℃ of left and right of waste gas medial temperature, discharge capacity: 27500 ~ 34000Nm3/h after once converting cold wind.Absorb heat for heating after through waste heat boiler winter, and the final exhaust temperature of flue gas, 250 ℃ of left and right, needs a large amount of secondaries to convert cold wind and cools to about 250 ℃ discharges, through smoke exhaust fan and smoke stack emission atmosphere summer.
The required total heat duties of zinc-plated color coating engineering design is 7,500,000 Kcal/h.Having a throughput is 10,500,kW(,900 ten thousand Kcal/h) heat conduction petrol station.110 tons of system thermal oil consumptions.Thermal oil oil temperature supplying is 250 ℃, and returning-oil temperature is 230 ℃, and thermal oil flow is 960Nm3/h.Heating raw adopts coke-oven gas, and usual amounts is 2500Nm3/h, and heat-conducting oil furnace thermo-efficiency is 85.7%.Main be responsible for zinc-plated, color coating unit cleans, the heating of passivation technology section liquid and dry the heating of wind everywhere.
In process of production, through long-time statistical, when only galvanizing line is produced, for guaranteeing the needs of gentle steel band oven dry of adding of on-line cleaning, passivation technology section liquid, thermal oil mean consumption in winter coal gas 1150Nm3/h, mean consumption in summer coal gas 900 Nm3/h.Meanwhile, a large amount of high-temperature flue gas that reductive annealed oven produces are in line aerial.Energy consumption is huge, is seriously restricting the reduction of producing line generalization cost.
For above situation analysis, mainly there are two problems in zinc-plated production energy consumption aspect:
1, the high-temperature flue gas of 400 ~ 450 ℃, through secondary convert be as cold as 250 ℃ after directly discharge, waste a large amount of heat energy.
2,, for guaranteeing to produce the functional effect of line cleaning section and drying baker, must open the public hot oil furnace of teaching and heat.Consume again other consumption such as a large amount of combustion gas and electric energy.
These two problems, have formed great energy dissipation.
Utility model content
The problem existing for currently available technology, the utility model specifically discloses a kind of galvanizing line bootstrap system.
The technical solution adopted in the utility model is as follows:
A kind of galvanizing line bootstrap system, comprises return water pipe, air-water interchanger and gas-to-gas heat exchanger, and described air-water parallel operation is arranged on reductive annealed oven main flue; After described gas-to-gas heat exchanger is arranged on air-water interchanger, before reductive annealed oven waste heat boiler; The cold water water outlet of described return water pipe connects the water return outlet of water tank, the water outlet of water tank connects two recycle pumps, described circulating-pump outlet is connected to the water-in of air-water interchanger by pipeline, the water outlet of air-water interchanger is connected to by pipeline on hot water backwater's mouth of return water pipe; Described gas-to-gas heat exchanger is connected to the entrance of each drying baker recirculation blower by pipeline, in ingress and install regulating device of air door additional.
The top of described air-water interchanger is connected to backwater funnel by relief pipeline, and junction is provided with normally open valve door.
Described drying baker comprises purifying drying baker, polishing drying baker, cooling tower drying baker, cleaning, drying case; Described oven dry bellows are realized the oven dry with steel by the hot blast blasting after gas-gas heat exchange; Described medium circulation pipeline is circulation passage and the heat exchanger channels of whole UTILIZATION OF VESIDUAL HEAT IN, and described water tank is the retaining replenisher tank of circulation line.
Between the cooling water outlet of described return water pipe and hot water backwater's mouth, be connected with washing bath parallel with one another, water brush groove, electrolyzer, alkali brush groove and alkaline bath.
Principle of work of the present utility model is as follows:
1, technical requirements
Dry with heat energy and clean heating heat energy and divide two pipeline heat exchangers, Mist heat recovering respectively.400 ~ 450 ℃ of air-water heat exchanger entrance flue-gas temperatures, 220 ℃ of exit gas temperatures, 85 ℃ of return water temperatures, leaving water temperature(LWT) is more than 95 ℃.220 ℃ of gas-gas entrance flue gas temperatures, exit gas temperature is below 100 ℃, and heat exchanger entrance air themperature normal temperature, heats 135 ℃ of left and right of rear temperature out.Flue gas waste heat recovery is first through air-water interchanger, then through gas-to-gas heat exchanger, guarantees the lifting of scavenging solution heats and organic efficiency.
2, air-water heat exchange
Air-water parallel operation is installed on reductive annealed oven main flue, by water pump, low temperature backwater is beaten to the bottom to interchanger, after heat exchanging water-jacket's heating, high-temperature water flows out from interchanger top exit, through pipeline, enter existing heat conducting oil pipe, high-temperature water is flowed through after each heating water tank and is become water at low temperature, the aqua storage tank in retrieval system, by water pump, beat the bottom to interchanger again, form heat-conducting medium circulation.
3, gas-gas heat exchange
After air-water heat exchanger, gas-gas heat exchanger is installed before reductive annealed oven waste heat boiler, heat exchanger entrance leads directly to atmosphere, through interchanger, is heated to the entrance that is transported to each oven dry bellows recirculation blower after 130 ℃ through pipeline, mixes post-drying steel plate with former recirculating air.
The invention has the beneficial effects as follows:
By technological transformation and system optimization, reclaim reduced anneal furnace flue gas exhaust heat, reduce and produce line generalization energy consumption, reduce exhaust gas emission temperature, reduce the pollution to environment; Make that annealing furnace reduces costs, the effective way of save energy, increase economic benefit.
By the system reform, fully recycle the waste heat of two line flue gases, with this heat, go to supply the thermal load of production line self, the heat-conducting oil system of simultaneously stopping using, saves out the working cost of heat-conducting oil system, to reach energy-saving and cost-reducing object.
Accompanying drawing explanation
Fig. 1 structure iron of the present utility model;
In figure: 1 thermal oil return water pipe, 2 water tanks, 3 recycle pumps, 4 cold water water outlets, 5 air-water interchanger, 6 gas-to-gas heat exchangers, 7 blower fans, 8 relief pipelines, 9 normally open valve doors, 10 backwater funnels, 11 purifying drying bakers, 12 polishing drying bakers, 13 cooling tower drying bakers, 14 cleaning, drying casees, 15 washing baths, 16 water brush grooves, 17 electrolyzers, 18 alkali brush grooves, 19 alkaline baths.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
Galvanizing line bootstrap system, comprises thermal oil return water pipe 1, air-water interchanger 5 and gas-to-gas heat exchanger 6, and described air-water parallel operation 5 is arranged on reductive annealed oven main flue; After described gas-to-gas heat exchanger 6 is arranged on air-water interchanger, before reductive annealed oven waste heat boiler; The cold water water outlet 4 of described thermal oil return water pipe connects the water return outlet of water tank 2, the water outlet of water tank 2 connects two recycle pumps 3, described recycle pump 3 exports the water-in that is connected to air-water interchanger 5 by pipeline, and the water outlet of air-water interchanger 5 is connected to by pipeline on hot water backwater's mouth of heat conducting oil pipe; Described gas-to-gas heat exchanger is connected to the entrance of each drying baker recirculation blower 7 by pipeline, in ingress and install regulating device of air door additional.
The top of air-water interchanger 5 is connected to backwater funnel 10 by relief pipeline 8, and junction is provided with normally open valve door 9, realizes the operation with no pressure of air-water interchanger, has reduced operation risk.
Drying baker comprises each purifying drying baker 11 of independently installing, polishing drying baker 12, cooling tower drying baker 13, cleaning, drying case 14.
Between the cooling water outlet of deep fat return water pipe and hot water backwater's mouth, connect the scavenging solution in tubular heat exchange heating water washing trough 15, water brush groove 16, electrolyzer 17, alkali brush groove 18, alkaline bath 19.Through the de-salted water of described air-water interchanger heating, in cleaning section, by tubular heat exchange, carry out secondary heat exchange, make strip cleaning medium in washing bath, water brush groove, electrolyzer, alkali brush groove and alkaline bath reach the temperature of processing requirement.
Claims (4)
1. a galvanizing line bootstrap system, is characterized in that: comprise return water pipe, air-water interchanger and gas-to-gas heat exchanger, described air-water parallel operation is arranged on reductive annealed oven main flue; After described gas-to-gas heat exchanger is arranged on air-water interchanger, before reductive annealed oven waste heat boiler; The cold water water outlet of described return water pipe connects the water return outlet of water tank, the water outlet of water tank connects two recycle pumps, described circulating-pump outlet is connected to the water-in of air-water interchanger by pipeline, the water outlet of air-water interchanger is connected to by pipeline on hot water backwater's mouth of return water pipe; Described gas-to-gas heat exchanger is connected to the entrance of each drying baker recirculation blower by pipeline, in ingress and install regulating device of air door additional.
2. the system as claimed in claim 1, is characterized in that: the top of described air-water interchanger is connected to backwater funnel by relief pipeline, and junction is provided with normally open valve door.
3. the system as claimed in claim 1, is characterized in that: described drying baker comprises independent purifying drying baker, polishing drying baker, cooling tower drying baker and the cleaning, drying case of installing.
4. the system as claimed in claim 1, is characterized in that: between the cold water water outlet of described return water pipe and hot water backwater's mouth, be connected with washing bath parallel with one another, water brush groove, electrolyzer, alkali brush groove and alkaline bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320693127.7U CN203546170U (en) | 2013-11-06 | 2013-11-06 | Galvanizing line afterheat utilizing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320693127.7U CN203546170U (en) | 2013-11-06 | 2013-11-06 | Galvanizing line afterheat utilizing system |
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| CN203546170U true CN203546170U (en) | 2014-04-16 |
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| CN201320693127.7U Expired - Fee Related CN203546170U (en) | 2013-11-06 | 2013-11-06 | Galvanizing line afterheat utilizing system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344739A (en) * | 2014-10-21 | 2015-02-11 | 重庆赛迪工业炉有限公司 | Device and method for comprehensive recycling of heat energy in plate and strip processing line |
| CN108034958A (en) * | 2017-12-27 | 2018-05-15 | 江苏刚正薄板科技有限公司 | A kind of UTILIZATION OF VESIDUAL HEAT IN heats steel plate pre-treatment water installations indirectly |
| CN108356074A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip acid is flat to plate integrated processor group and coil of strip production method |
| CN111378813A (en) * | 2018-12-30 | 2020-07-07 | 瑨祥(宜昌)机电设备有限公司 | Flow-control energy-saving annealing furnace for galvanized wire |
-
2013
- 2013-11-06 CN CN201320693127.7U patent/CN203546170U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344739A (en) * | 2014-10-21 | 2015-02-11 | 重庆赛迪工业炉有限公司 | Device and method for comprehensive recycling of heat energy in plate and strip processing line |
| CN104344739B (en) * | 2014-10-21 | 2017-02-01 | 重庆赛迪热工环保工程技术有限公司 | Device and method for comprehensive recycling of heat energy in plate and strip processing line |
| CN108034958A (en) * | 2017-12-27 | 2018-05-15 | 江苏刚正薄板科技有限公司 | A kind of UTILIZATION OF VESIDUAL HEAT IN heats steel plate pre-treatment water installations indirectly |
| CN108356074A (en) * | 2018-04-23 | 2018-08-03 | 黄石山力科技股份有限公司 | A kind of coil of strip acid is flat to plate integrated processor group and coil of strip production method |
| CN111378813A (en) * | 2018-12-30 | 2020-07-07 | 瑨祥(宜昌)机电设备有限公司 | Flow-control energy-saving annealing furnace for galvanized wire |
| CN111378813B (en) * | 2018-12-30 | 2021-09-21 | 瑨祥(宜昌)机电设备有限公司 | Flow-control energy-saving annealing furnace for galvanized wire |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140416 Termination date: 20141106 |
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| EXPY | Termination of patent right or utility model |