CN104481609A - Blast furnace discharge yard waste heat power generation system and method - Google Patents
Blast furnace discharge yard waste heat power generation system and method Download PDFInfo
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- CN104481609A CN104481609A CN201410535986.2A CN201410535986A CN104481609A CN 104481609 A CN104481609 A CN 104481609A CN 201410535986 A CN201410535986 A CN 201410535986A CN 104481609 A CN104481609 A CN 104481609A
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Abstract
The invention discloses a blast furnace discharge yard waste heat power generation system. The system consists of a waste heat boiler system and a turbine power generation system, wherein the waste heat boiler system comprises a steam drum, a circulating pump, a plurality of blast furnace discharge yard waste heat collectors, a pipeline and a control valve thereof. A blast furnace discharge yard waste heat power generation method comprises the following steps: (1) pumping hot water in the steam drum to a hot water main pipe, flowing through the waste heat collector in a discharge yard heat insulating dust-proof housing waiting to discharge to absorb heat to change into water-steam mixture, and entering a distributor of the steam drum through a water-steam mixture main pipe; (2) performing steam-water separation on the water-steam mixture in the steam drum; (3) feeding saturated steam in a saturated steam main pipe into the waste heat collector, and absorbing heat energy to change into hot steam to enter a steam turbine; (4) feeding over-heated steam into the turbine to drive the turbine to generate power, flowing through a condensation, deoxidization and heating device of the turbine power generation system to form pure hot water to be provided for the steam drum for recycling.
Description
Technical field
The present invention relates to blast furnace discharge yard heat recovery technology, is that one utilizes blast furnace discharge yard thermal radiation power generation system and method.
Background technique
Have a large amount of middle Large Scale BF in the world in production and application at present, in these, Large Scale BF manufacturing efficiency is high, and production technology economic indicator is advanced, and capital investment is low.Medium-and-large-sized blast furnace generally has two to four iron mouths, and cast house waste heat is very concentrated.
Generally there are many blast furnaces in big-and-middle-sized iron and steel enterprise, and realizes resource-sharing in order to systems such as each blast furnace water, electric power, raw material, coal gas, coal powder injections, and these blast furnaces mostly concentrate in together, and are convenient to very much the collection of each cast house residual heat resources.
Blast furnace, in order to ensure cast house operating environment, generally all arranges heat-proof dust cover, to reach dust-proof, heat insulation object above tens meters even tens meters of long tap drains, slag runner, cleek.These heat-proof dust covers mostly are the steel cage of inner cast refractory matter at present, because molten iron temperature is up to 1450 DEG C, thermal radiation is very big, heat-proof dust cover there will be the defects such as refractory matter comes off, casing deformation, need regularly to change it, and effect of heat insulation is poor, waste a large amount of heat energy, cause cast house temperature high, operating environment is poor.
At Tie Kou in time tapping a blast furnace, cast house heat-proof dust cover internal surface temperature is up to 600 ~ 700 DEG C; When Tie Kou taps a blast furnace, heat-proof dust cover internal surface temperature is especially up to 1100 ~ 1200 DEG C.So cast house has a large amount of residual heat resources, and calorific value is high, can directly recycle.
Blast furnace each cast house tapping duration and frequency are generally all very regular, therefore cast house provides residual heat resources very steady.
Summary of the invention
The object of the invention is to provide a kind of system and method utilizing blast furnace discharge yard cogeneration, with the waste heat made full use of with reclaim blast furnace discharge yard.
The present invention realizes the technological scheme that object adopts:
Blast furnace discharge yard afterheat generating system, comprise afterheat boiler system and turbine generating system, after the generating of superheated vapor driving steam turbine, the device such as condensing, deoxygenation, heating through turbine generating system forms pure hot water, be supplied to drum, it is characterized in that: described afterheat boiler system comprises drum, recycle pump, multiple blast furnace discharge yard remaining heat trap, pipeline and control valve thereof; Blast furnace discharge yard remaining heat trap is the coiler in cast house heat-proof dust cover, and coiler is along heat-proof dust cover inwall tiling multilayer, and coiler is provided with fin; Remaining heat trap entrance, outlet respectively have two arms, and each arm is provided with ball valve, flow control valve and check valve successively; Entrance two arms connect hot water main pipe, saturated vapour supervisor respectively, export two arms and connect steam mixed charge, superheated vapor supervisor respectively; Each remaining heat trap is parallel between hot water main pipe and steam mixed charge; Hot water main pipe is provided with recycle pump, and one end connects the hot water outlet bottom drum, and the other end connects each remaining heat trap entrance; Saturated vapour is responsible for the steam (vapor) outlet that one end connects drum top, and the other end connects each remaining heat trap entrance; Steam mixed charge one end connects the distributor entrance of drum, and the other end connects the outlet of each remaining heat trap; Superheated vapor is responsible for one end and is connected steam turbine entrance, and the other end connects the outlet of each remaining heat trap; Each remaining heat trap, hot water main pipe, steam mixed charge, saturated vapour supervisor, superheated vapor supervisor are equipped with pressure gauge.
Blast furnace discharge yard method for power generation by waste heat, comprises the following steps:
(1) hot water in drum delivers to hot water main pipe through recycle pump, flow through the remaining heat trap waited in the heat insulation dust hood of cast house that taps a blast furnace, coiler surface temperature is 600 ~ 700 DEG C, absorbs heat and becomes gas-vapor mix, entered the distributor of drum by steam mixed charge;
(2) after gas-vapor mix enters the distributor of drum, in drum, carry out carbonated drink separation, steam enters saturated vapour supervisor from drum top exit;
(3) saturated vapour in saturated vapour supervisor enters the remaining heat trap in the heat insulation dust hood of the cast house tapped a blast furnace, coiler surface temperature is 1100 ~ 1200 DEG C, absorb heat energy and become superheated vapor, by superheated vapor, supervisor enters steam turbine machine power generating system;
(4), after superheated vapor enters Steam Turbine Driven steam turbine power generation, form pure hot water through the condensing of turbine generating system, deoxygenation, heating equipment, be supplied to drum and recycle.
Beneficial effect of the present invention:
1) recycle the thermal radiation generating on blast furnace discharge yard heat-proof dust cover, produce direct economic benefit.
2) absorb the thermal radiation on blast furnace discharge yard heat-proof dust cover, to obtain the effect of heat insulation of replacing, improve cast house operating environment.
3) the afterheat boiler system structural type in the present invention, is integrated together the remaining heat trap parallel connection of multiple cast houses of one or more blast furnace, has following feature:
Residual heat resources put together more stable, can provide a large amount of comparatively constant superheated vapor to turbine generating system;
Because cast house thermal radiation waste heat is extremely strong, calorific value is high, and the remaining heat trap of cast house is inherently equivalent to vaporizer and the superheater of exhaust heat boiler, directly produces saturated vapour and superheated vapor, makes structure simple;
Each cast house remaining heat trap is in parallel, each remaining heat trap is overhauled, or newly-increased remaining heat trap is all very convenient, is especially convenient to cast house tap drain, the dismounting of slag runner, cleek heat-proof dust cover when safeguarding;
Each cast house remaining heat trap is parallel between hot water main pipe and steam mixed charge, can realize its vaporizer fast and superheater function switches.
Accompanying drawing explanation
Fig. 1 is blast furnace discharge yard afterheat generating system schematic diagram.
In figure: 1-1 cast house remaining heat trap, 2-2 cast house remaining heat trap, 3-N cast house remaining heat trap, 4-hot water main pipe, 5-steam mixed charge, 6-saturated vapour is responsible for, 7-superheated vapor is responsible for, 8-drum, 9-recycle pump, 10-hot water main pipe pressure gauge, 11-steam mixed charge pressure gauge, 12-saturated vapour main pipe pressure table, 13-superheated vapor main pipe pressure table, 14-turbine generating system.A, B, I, J-flow control valve, C, D, G, H-ball valve, E, F, K, L-check valve, P-cast house remaining heat trap pressure gauge (index number is cast house remaining heat trap numbering).
Embodiment
Below in conjunction with accompanying drawing and embodiment, describe the present invention in detail.
Blast furnace afterheat generating system embodiment, comprises afterheat boiler system and turbine generating system 14.Described afterheat boiler system is responsible for 6 by N number of cast house remaining heat trap (as in figure 1,2,3), hot water main pipe 4, steam mixed charge 5, saturated vapour, superheated vapor is responsible for 7, drum 8, recycle pump 9 and multiple ball valve (C, D, G, H as in figure), flow control valve (A, B, I, J as in figure), check valve (E, F, K, L as in figure) and pressure gauge (as 10 in figure, 11,12,13, P) form.After the generating of superheated vapor driving steam turbine, the device such as condensing, deoxygenation, heating through turbine generating system 14 forms pure hot water, is supplied to drum 8.Described afterheat boiler system comprises drum 8, recycle pump 9, multiple blast furnace discharge yard remaining heat trap, pipeline and control valve thereof; Blast furnace discharge yard remaining heat trap is the coiler in cast house heat-proof dust cover, and coiler is along heat-proof dust cover inwall tiling multilayer, and coiler is provided with fin; Remaining heat trap entrance, outlet respectively have two arms, and each arm is provided with ball valve, flow control valve and check valve successively; Entrance two arms connect hot water main pipe 4, saturated vapour supervisor 6 respectively, export two arms and connect steam mixed charge 10, superheated vapor supervisor 7 respectively; Each remaining heat trap is parallel between hot water main pipe 4 and steam mixed charge 5; Hot water main pipe 4 is provided with recycle pump 9, and one end connects the hot water outlet bottom drum 8, and the other end connects each remaining heat trap entrance; Saturated vapour is responsible for the steam (vapor) outlet that 6 one end connect drum 8 top, and the other end connects each remaining heat trap entrance; Steam mixed charge 5 one end connects the distributor entrance of drum 8, and the other end connects the outlet of each remaining heat trap; Superheated vapor is responsible for 7 one end and is connected steam turbine entrance, and the other end connects the outlet of each remaining heat trap; Each remaining heat trap, hot water main pipe 4, steam mixed charge 5, saturated vapour supervisor 6, superheated vapor supervisor 7 are equipped with pressure gauge.
No. 1 cast house 1 remaining heat trap is that wait is tapped a blast furnace state, and its coiler surface temperature is 600 ~ 700 DEG C.Ball valve G1, flow control valve I1 that its entrance and saturated vapour are responsible on 6 arms be connected are in closed condition, and the ball valve H1 on the arm be connected with hot water main pipe 4, flow control valve J1 are in opening state; Ball valve D1, flow control valve B1 on the arm that its outlet is connected with steam mixed charge 5 are in opening state, and the ball valve C1, the flow control valve A1 that are responsible on 7 arms be connected with superheated vapor are in closed condition.Now No. 1 cast house remaining heat trap uses as the vaporizer of afterheat boiler system.
No. 2 cast house 2 remaining heat traps are the state of tapping a blast furnace, and its coiler surface temperature is 1100 ~ 1200 DEG C.Ball valve G2, flow control valve I2 that its entrance and saturated vapour are responsible on 6 arms be connected are in opening state, and the ball valve H2 on the arm be connected with hot water main pipe 4, flow control valve J2 are in closed condition; Ball valve D2, flow control valve B2 on the arm that its outlet is connected with steam mixed charge 5 are in closed condition, and the ball valve C2, the flow control valve A2 that are responsible on 7 arms be connected with superheated vapor are in opening state.Now No. 2 cast house remaining heat traps use as the superheater of afterheat boiler system.
By to the switch of each cast house remaining heat trap terminal valve and the adjustment of flow control valve, the superheater function of cast house remaining heat trap can be realized accordingly and evaporator function switches, also can adjust, saturated steam flow and overheated steaming amount in balance sysmte.
Blast furnace discharge yard method for power generation by waste heat embodiment one, comprises the following steps:
(1) hot water of drum 8 li delivers to hot water main pipe 4 through recycle pump 9, flow through the cast house remaining heat trap 1 waited for and tapping a blast furnace, coiler surface temperature is 600 DEG C, absorbs heat and becomes gas-vapor mix, entered the distributor of drum 8 by steam mixed charge 5;
(2) after gas-vapor mix enters the distributor of drum 8, in drum 8, carry out steam separation, saturated vapour enters saturated vapour supervisor 6 from drum 8 top exit;
(3) saturated vapour in saturated vapour supervisor 6 enters No. two cast house remaining heat traps 2 tapped a blast furnace, and coiler surface temperature is 1100 DEG C, absorbs heat energy and becomes superheated vapor, enters steam turbine machine power generating system 14 by superheated vapor supervisor 7;
(4), after superheated vapor enters the generating of steam turbine system 14 driving steam turbine, the devices such as the condensing in turbine generating system 14, deoxygenation, heating form pure hot water, are supplied to drum 8 and recycle.
Blast furnace discharge yard method for power generation by waste heat embodiment two, comprises the following steps:
(1) hot water of drum 8 li delivers to hot water main pipe 4 through recycle pump 9, flow through the cast house remaining heat trap 1 waited for and tapping a blast furnace, coiler surface temperature is 700 DEG C, absorbs heat and becomes gas-vapor mix, entered the distributor of drum 8 by steam mixed charge 5;
(2) after gas-vapor mix enters the distributor of drum 8, in drum 8, carry out steam separation, saturated vapour enters saturated vapour supervisor 6 from drum 8 top exit;
(3) saturated vapour in saturated vapour supervisor 6 enters No. two cast house remaining heat traps 2 tapped a blast furnace, and coiler surface temperature is 1200 DEG C, absorbs heat energy and becomes superheated vapor, enters steam turbine machine power generating system 14 by superheated vapor supervisor 7;
(4), after superheated vapor enters the generating of steam turbine system 14 driving steam turbine, the devices such as the condensing in turbine generating system 14, deoxygenation, heating form pure hot water, are supplied to drum 8 and recycle.
Claims (2)
1. blast furnace discharge yard afterheat generating system, comprise afterheat boiler system and turbine generating system, after the generating of superheated vapor driving steam turbine, the device such as condensing, deoxygenation, heating through turbine generating system forms pure hot water, be supplied to drum, it is characterized in that: described afterheat boiler system comprises drum, recycle pump, multiple blast furnace discharge yard remaining heat trap, pipeline and control valve thereof; Blast furnace discharge yard remaining heat trap is the coiler in cast house heat-proof dust cover, and coiler is along heat-proof dust cover inwall tiling multilayer, and coiler is provided with fin; Remaining heat trap entrance, outlet respectively have two arms, and each arm is provided with ball valve, flow control valve and check valve successively; Entrance two arms connect hot water main pipe, saturated vapour supervisor respectively, export two arms and connect steam mixed charge, superheated vapor supervisor respectively; Each remaining heat trap is parallel between hot water main pipe and steam mixed charge; Hot water main pipe is provided with recycle pump, and one end connects the hot water outlet bottom drum, and the other end connects each remaining heat trap entrance; Saturated vapour is responsible for the steam (vapor) outlet that one end connects drum top, and the other end connects each remaining heat trap entrance; Steam mixed charge one end connects the distributor entrance of drum, and the other end connects the outlet of each remaining heat trap; Superheated vapor is responsible for one end and is connected steam turbine entrance, and the other end connects the outlet of each remaining heat trap; Each remaining heat trap, hot water main pipe, steam mixed charge, saturated vapour supervisor, superheated vapor supervisor are equipped with pressure gauge.
2. blast furnace discharge yard method for power generation by waste heat, is characterized in that comprising the following steps:
(1) hot water in drum delivers to hot water main pipe through recycle pump, flow through the remaining heat trap waited in the heat insulation dust hood of cast house that taps a blast furnace, coiler surface temperature is 600 ~ 700 DEG C, absorbs heat and becomes gas-vapor mix, entered the distributor of drum by steam mixed charge;
(2) after gas-vapor mix enters the distributor of drum, in drum, carry out carbonated drink separation, steam enters saturated vapour supervisor from drum top exit;
(3) saturated vapour in saturated vapour supervisor enters the remaining heat trap in the heat insulation dust hood of the cast house tapped a blast furnace, coiler surface temperature is 1100 ~ 1200 DEG C, absorb heat energy and become superheated vapor, by superheated vapor, supervisor enters steam turbine machine power generating system;
(4), after superheated vapor enters Steam Turbine Driven steam turbine power generation, form pure hot water through the condensing of turbine generating system, deoxygenation, heating equipment, be supplied to drum and recycle.
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| CN201410535986.2A CN104481609A (en) | 2014-10-13 | 2014-10-13 | Blast furnace discharge yard waste heat power generation system and method |
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| CN201410535986.2A CN104481609A (en) | 2014-10-13 | 2014-10-13 | Blast furnace discharge yard waste heat power generation system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108796155A (en) * | 2017-04-27 | 2018-11-13 | 天津汇金敏峰新材料科技有限公司 | Exposure degree energy-saving power generation system and electricity-generating method more than blast furnace discharge yard slag iron water |
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- 2014-10-13 CN CN201410535986.2A patent/CN104481609A/en active Pending
Patent Citations (5)
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| CN201407913Y (en) * | 2009-04-21 | 2010-02-17 | 福建省东锅节能科技有限公司 | Medium temperature and medium pressure residual heat utilization power generation device for dry-process cement production line |
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| CN201686659U (en) * | 2010-02-05 | 2010-12-29 | 北京得能创新科技有限公司 | Waste heat power generating device of coke oven riser |
| CN102242647A (en) * | 2011-04-20 | 2011-11-16 | 南志远 | Waste heat power generation system of multiple glass kilns |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108796155A (en) * | 2017-04-27 | 2018-11-13 | 天津汇金敏峰新材料科技有限公司 | Exposure degree energy-saving power generation system and electricity-generating method more than blast furnace discharge yard slag iron water |
| CN108796155B (en) * | 2017-04-27 | 2024-03-12 | 天津汇金敏峰新材料科技有限公司 | Blast furnace cast house slag iron Shui Yu sensible heat recovery energy-saving power generation system and power generation method |
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