CN202595161U - Blast furnace top gas recovery system - Google Patents
Blast furnace top gas recovery system Download PDFInfo
- Publication number
- CN202595161U CN202595161U CN2010900011266U CN201090001126U CN202595161U CN 202595161 U CN202595161 U CN 202595161U CN 2010900011266 U CN2010900011266 U CN 2010900011266U CN 201090001126 U CN201090001126 U CN 201090001126U CN 202595161 U CN202595161 U CN 202595161U
- Authority
- CN
- China
- Prior art keywords
- top gas
- unit
- blast furnace
- expansion turbine
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000011084 recovery Methods 0.000 title claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 10
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 97
- 238000000746 purification Methods 0.000 description 12
- 241000196324 Embryophyta Species 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 244000287680 Garcinia dulcis Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/62—Energy conversion other than by heat exchange, e.g. by use of exhaust gas in energy production
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/60—Process control or energy utilisation in the manufacture of iron or steel
- C21B2100/66—Heat exchange
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
- Blast Furnaces (AREA)
Abstract
The utility model provides a blast furnace top gas recovery system which comprises an expansion turbine (24), a furnace top gas purifying unit (12) and a preheating unit (22), wherein blast furnace gas expands in the expansion turbine and provides mechanical power for a load (30) which is coupled with an output shaft of the turbine, the preheating unit (22) is connected with the expansion turbine and is positioned before the turbine, the pipeline systems (14) of the furnace top gas purifying unit (12), the preheating unit (22) and the expansion turbine (24) are sequentially connected, the blast furnace top gas recovery system is characterized in that a heat exchanger is arranged in a pipeline system between the furnace top gas purifying unit (12) and the preheating unit (22) and is convenient for heating furnace gas airflow, the heat exchanger comprises a heat transfer side, and an inlet of the transfer side is connected with the outlet of the expansion turbine (24). By the aid of the blast furnace top gas recovery system, the energy output and the efficiency of the whole blast furnace top gas expansion turbine process can be improved.
Description
Technical field
The utility model is usually directed to the processing of blast furnace gas, more particularly, relates to and reclaims the gas ability in the blast furnace furnace roof atmospheric pressure from expansion turbine.
Background technology
As known in this field, the blast furnace top gas is at the blast furnace sub product that uses coke and/or other fuel that reduction of iron ore is produced during as metallic iron.The blast furnace top gas is used as the fuel of Iron And Steel Plant usually, but it also can burn in boiler and generating set.Top gas also can mix with Sweet natural gas or coke-oven gas before burning, and the burning upholder that perhaps has higher calorific value gas or oil is provided into to keep burning.
And known, for decades, blast furnace (BF) is all worked under internal over pressure, and by the appropriate size of stove, this allows the remarkable increase of the conversion of material and energy, so pig iron production increases.
Under internal over pressure, work and also mean the cost of the remarkable increase relevant with operation certainly with equipment.More specifically; This can require in the cold-blast compressor, to produce has the forced air of suitable supply pressure level, thereby forms so-called cold-blast, and cold-blast is subsequently at hotblast stove (or Cowper; Cowper stove) be heated to the high temperature level in, and the hot-blast that forms is blown in the blast furnace.
In addition, typical part is for the excessive rolling operation, is in from Top of BF expellant gas (just top gas or installation for blast furnace gas) to be significantly higher than under the atmospheric pressure.Yet this top gas still contains incendivity composition (mainly being carbon monoxide and more a spot of hydrogen), and can be used as the low heat value combustion gases for producing heat energy or mechanical energy and electric energy.
The top gas that leaves blast furnace carries the solid matter of a great deal of, mainly is the solid matter of dust form.Before any later use of top gas, all require to remove solid material.This is to realize at the gas sweetening subset of blast-furnace equipment traditionally; Generally include: at first, dry method separating device (dry separation equipment)-have gravity separator (fly-ash separator) and/or axial flow cyclonic separator (axial cyclone)-with subsequently the meticulous refining plant of wet method (drain separator).Because wet purification, the top gas temperature will reduce about 100 ℃, is in the steam-laden state and comprises extra liquid water droplets.
People know for a long time, and after purification, except the heat energy that utilizes top gas, also the gas with the BF top gas of supercharging can be recovered in the expansion turbine.In this expansion turbine, thereby the top gas expansion produces mechanical work simultaneously near normal atmosphere.The expansion turbine machine rotor for example can be connected to generator, cold-blast compressor or any other load.
As present known, (being also referred to as efficient that top pressure reclaims turbo-TRT) can just get into turbo through the top gas in this purification (and therefore being cooled) and heat this top gas before and increase this type expansion turbine.This puts down in writing among the JP 62074009 for example.Though the top gas that purifies heated TRT efficient made us expecting the expansible top gas has higher temperature out.This is for such as the thermoelectric power station user being a problem, and top gas can be higher than arrival user there under the temperature of expection.
The utility model content
The purpose of the utility model provides improved blast furnace top gas recovery system.
According to the utility model, a kind of blast furnace top gas recovery system is provided, it comprises: expansion turbine, blast furnace gas expand in said expansion turbine and to the load that is coupled to the turbo output shaft mechanical work are provided; The top gas clean unit be connected to said expansion turbine and be positioned at the unit that preheats at its upper reaches; Be linked in sequence said top gas clean unit, preheat the pipeline system of unit and expansion turbine; Wherein, Heat exchanger is arranged in said top gas clean unit and saidly preheats unit intermediary pipeline system so that heat said top gas air-flow; Wherein said heat exchanger comprises the heat release side, and the import of this heat release side is communicated with the outlet of said expansion turbine.
Particularly, the blast furnace top gas recovery system according to an aspect of the utility model comprises: top gas clean unit/equipment, the top gas that the adjusting blast furnace discharges; Heat exchanger comprises heat absorbing side and heat release side (every side all has import and outlet), and wherein first pipeline connects the outlet of said top gas treating plant and the import of said heat exchanger heat absorbing side; Preheat the unit, it has import, and this import is connected to the outlet of the said heat release side of said heat exchanger through second pipeline; Expansion turbine, it has import and outlet, and its import is connected to the said unitary outlet that preheats through the 3rd pipeline, and its outlet is connected to the import of the heat release side of said heat exchanger through the 4th pipeline; Load is connected to the output shaft (rotor) of expansion turbine.
According to the utility model, the expansion BF top gas that leaves expansion turbine in the TRT equipment is used as the thermal source of heat exchanger, and (tradition) that said heat exchanger is positioned at the top gas clean unit/equipment and the expansion turbine upper reaches preheats in the middle of the unit.In other words, the waste heat of the expansion furnace roof air-flow in expansion turbine downstream is used to the purification furnace roof air-flow at heating (preheating) expansion turbine upper reaches.
The recycle scheme of BF top gas has been proved to be remarkable advantage in the TRT equipment.At first; It allows the temperature of the purification BF top gas at increase turbine inlet place; This is because heat can be removed in the heat exchanger in turbo downstream, therefore, purification, expanding gas can flow to the clean gas network under the temperature favourable to downstream user.The second, because the top gas that purifies is partly heated in the heat exchanger before preheating the unit, thereby can reduce the amount that preheats the energy that requires in the unit.
In fact, this operator scheme can cause the energy output of whole BF top gas TRT technology and the increase of efficient.
The term heat exchanger here comprises the device of any suitable type, and wherein the air-flow of the purification top gas of turbine upstream can form heat exchange relationship with the expansion furnace roof air-flow in turbo downstream, but does not mix each other.Obviously in this type heat exchanger, heat is transferred to the top gas air-flow of turbine upstream through thermal conduction from the expansible cold air, but in heat exchanger itself, expansible furnace roof air-flow is burning not.
Preferably, said blast furnace furnace roof entraining air stream be the steam-laden state and/or contain water droplet.For this purpose, saidly preheat that the unit comprises at least one nozzle so that water is injected in the clean top gas air-flow of flowing through wherein.
Description of drawings
Below through example, with reference to description of drawings the utility model, wherein:
Fig. 1 is the synoptic diagram of the preferred embodiment of this blast furnace top gas recovery system.
Embodiment
In order to further specify the utility model, with the explanation that provides the relevant thermodynamic process under simplification and the ideal conditions below through example.
Under the hypothesis of perfect gas situation, do not consider condensed steam and ignore expansion losses that the specified output work of the expansion top gas in the turbo can be expressed by following formula:
a＝[κ＊R＊T
1/(κ-1)]＊[1-(p
2/p
1)
(κ-1)/κ]＝[A]＊[B](1)
Wherein:
A [J/kg]: the specified output work of every kilogram of top gas or the specified output of mechanical energy
κ [-]: isoentropic index, depend on the ratio of diatomic in the top gas or three atom gas, it is worth between 1.3 and 1.4
R [J/ (kg*K)]: gas law constant
T
1[K]: the T at turbine inlet place
p
1[Pa a]: the absolute pressure at turbine inlet place
p
2[Pa a]: the absolute pressure in turbo exit
Because p
1And p
2Occur as ratio, they are Israel and Palestine (bar) expression more simplifiedly also.
[B] depends primarily on pressure ratio (promptly depending on the top gas overvoltage and the interior pressure loss of gas purification units/equipment in blast furnace exit) before and after the turbo on the one hand, also depends on the Purge gas network behind the turbo on the other hand.Locate the about 0.1 crust g of pressure in the total pressure loss, Purge gas network of 0.4 crust in the top gas overvoltage, treating plant of about 2.5 crust g or 3.5 crust a at the BF top or reach the pressure of 1.1 crust a, and under the situation of κ=1.35, [B] can for example be worth 0.236.Notice that [B] item is with p
1Increase, and at p
2/ p
1Drop at 0 o'clock and approach 1.
[A] item only changes with turbine inlet temperature sensitively.[A] is with temperature T
1Increase pro rata, and therefore specified output work a also increases, yet the latter is by [B] adjusting.Note the enthalpy of [A] expression top gas.
As obviously seeing, [A] (being turbine inlet temperature) should be avoided top gas to get into turbo temperature before to reduce to the result of the influence of specified output work a as much as possible.
This can realize through replacing the meticulous purification of wet method with the meticulous purification system of dry method (for example, using a solution of electrofilter or deep bed filter-seldom use).The additional cost of the anti-meticulous refining plant of wet method of pressing of this type is actually sizable.
Though satisfactory degree is low on the energy, the back that therefore turbo is installed in the meticulous refining plant of wet method is the main flow way, and turbo provides refrigerative, has been in the expansion of the blast furnace gas of vapo(u)rous state and free of water droplets.
According to this " cold " turbo structural form, people have proposed the cooling blast furnace gas at heating (preheating) the wet purification downstream and the turbine inlet upper reaches.Except the advantage that makes specified output work increase, previous " cold " and the temperature increase of vapour-saturated blast furnace gas at the turbine inlet place also have avoiding or reduce water vapor condensation and the advantage that forms water droplet in the expansion process.In fact, water droplet can damage turbine vane (blade) or cause the damage of turbine vane, and therefore must limit the formation of water droplet.Preheating of " cold " blast furnace gas can realize in the unit that preheats that is arranged in the turbine inlet upper reaches, and utilize the heat energy that obtains from the top gas burning.
Suppose T
0Be the T of the top gas in top gas clean unit exit, then T
1=T
0The traditional method of expression " cold " expansion turbine, and T
1＞T
0Expression has the situation of preheating.
This means turbine-exit temperature T
2Be through pressure ratio p
2/ p
1With inlet temperature T
1Be associated, this can represent by following formula:
T
2＝T
1＊(p
2/p
1)
(κ-1)/κ＝T
1＊[C]?(2)
Under the situation of the example calculation value of [B], can obtain [C] value is 0.764.
For existing utility and design, temperature T
2Be no more than T
0(that is, turbine-exit temperature is no more than the temperature in top gas treating plant exit) is important to follow-up top gas user.T then
1Maybe not can exceedance T
0/ [C].For example, at T
2Can not surpass T
0In the situation of=50 ℃ of ≈ 323K, preheating temperature T then
1Can not exceedance 323/0.764=423K ≈ 150 ℃.
Therefore, with " cold " turbo operation compared, be limited in 1/ [C]-1=1/0.764-1=0.31 or 31% owing to preheat the increase of the specified output work that causes.Yet (, can notice, in order to simplify, can not consider through adding the increase that expansion that residual liquid in hot steam and the top gas purifies the superheated vapour of evaporation of water and overheated and condensation minimizing or frozen-free causes total output work).
Should be appreciated that; In order further to increase specified output work, the utility model provides the top gas treating plant with (tradition) thus preheat and introduce heat exchanger in the middle of the unit and utilize the waste heat in the expansible top gas and heat said cold, clean top gas.Therefore, after leaving the top gas cleaning apparatus, cold, clean top gas is injected into heat exchanger cold side (heat-obtaining/heat absorbing side), and its temperature is from T here
0Be increased to T
01In heat exchanger, heat is delivered to cold, clean gas from the expansion top gas that is injected into heat exchanger heat side (heat release side).
Top gas is injected into tradition subsequently and preheats the unit, and here its temperature is from T
01Be increased to T
1In the turbo downstream, after the furnace roof air-flow passed heat exchanger, the temperature of furnace roof air-flow was from T
2Be reduced to preferred temperature, promptly be about T once more
0, so that get into the clean gas network and use at the user facility place.
Such operating procedure can carry out in blast-furnace equipment as shown in Figure 1, has reported temperature T here
0, T
01, T
1And T
2Reference number 10 refers to blast furnace, thereby this blast furnace is connected recovery gas ability from the top gas that blast furnace 10 discharges with the top gas recovery system.The BF gas that discharges from BF 10 is injected into usually the top gas clean unit or equipment by 12 indications.Top gas clean unit 12 preferably includes the dry type separator 16 that is connected in series with drain separator 18.In unit 12, can carry out the purification techniques of any suitable type.
The top gas air-flow that purifies then gets into heat exchanger 20, and (here it is heated to T
01), enter into subsequently and preheat unit 22, and from preheat the unit with temperature T
1Discharge.The clean gas of preheating subsequently flows into expansion turbine 24 and with temperature T
2From expansion turbine, discharge.The heat release side of this expansible airflow passes heat exchanger 20 and in temperature T
0Be transported to the clean gas network.Turbo 24 has rotor, and its output shaft is connected to load 30 (like generator or be used for the air of BF cold-blast).
In the present embodiment, the heat exchanger 20 of traditional type comprises: the collection chamber (plenum chamber) that is positioned at the cold top gas that the reception on cold (heat absorption) side discharges from cleaning apparatus 20; And cross collection chamber and carry serpentine tube by the expansion furnace roof air-flow of turbo 24 conveyings.As those skilled in the art understand, can use the heat exchanger of any other type, said heat exchanger allows upstream and downstream (turbo relatively) BF air-flow to form heat exchange relationship, but do not mix upstream and downstream BF air-flow.Preferably, this heat exchanger directly is carried between the upstream and downstream BF gas, need not to use the central fluid loop.
As for preheating unit 22; Can certainly comprise collection chamber/snakelike tube type heat exchanger, for example its heat release (heat) side can be from drawing heat or from slag granulation device (of JP 62074009), draw heat through the fluid of external source (like the BF burning of gas) heating.
Though only show the TRT system among Fig. 1; And only there is a pipeline system 14 with its each element interconnection; Obviously the top gas that discharges from BF 10 needn't all and only be that part can be handled among TRT; The residue top gas for example is used to heating (burning) purpose at preheating unit 22 or elswhere, and this is well known to a person skilled in the art.
We explain how the utility model influences the operation of reclaiming turbo now.
Under the hypothesis of simplifying; Particularly, if ignore the remaining temperature difference between outlet of heat release in the heat exchanger 20 and the heat absorption import, and do not consider water vapour and liquid water once more; The temperature reduction of increase of the temperature of heat absorbing side and heat release side equates in the heat exchanger, and the temperature out of heat release side reaches T
0, Δ T then
0=T
01-T
0=T
2-T
0, the temperature increase that preheats simultaneously in the unit 22 equals Δ T
1=T
1-T
01, the Δ T in the heat exchanger 22 then
0Preheat the Δ T in the unit 22 with tradition
1Between have a following relationship:
ΔT
0＝{[C]/(1-[C])}＊ΔT
1-T
0(3)
In order to make Δ T
0Be positive, that is, and in order to prove that to utilize heat exchanger 20 justified, Δ T
1Must compare T
0* { 1/ [C]-1} is big.{ 1/ [C]-1} surpasses T corresponding to the top ultimate value that provides for preheating with the temperature of avoiding the turbo exit to the ultimate value factor
0, this value is 0.31 in example calculation.
In this scope more than ultimate value, that is, begin from heat exchanger 20 useful temperature, tradition preheats the Δ T in the unit 22
1With the turbine inlet temperature T
1Between have a relation of plane down:
T
1＝{1/(1-[C])}＊ΔT
1?(4)
Based on top example value, this causes T
1=4.24* Δ T
1In other words, T
1Increase increases fast approximately four times than temperature in the preheating unit 22.Utilize the equality (4) in the relation (1), utilize [C] that obtain from equality (2) simultaneously, obviously can see following result,
a＝[κ＊R＊/(κ-1)]＊ΔT
1(5)
Therefore, the each amplification that preheats temperature increase in the unit 22 all causes the increase of specified output work with 1: 1 ratio, or the same with the degree of enthalpy variation.Preheat in the situation of (for example, reaching 150 ℃) without heat exchanger 20 execution what enter on, preheating (and therefore increase of turbine inlet temperature) causes specified output work to reduce with factor [B], and its value is 0.236 in this example.
(1: 1 transformation efficiency of the extra heat of supply (increases Δ T in increasing a) to add output work
1)-we can say do not have that Carnot efficiency-this can be explained by the transition to the higher temperature level time of the expansion temperature of entire area, and ratio T
2/ T
1Because constant ratio p
2/ p
1And remain unchanged.
In order further to explain the utility model, following table 1 is under simplified condition and ignore under the situation of the pressure-losses in heat exchanger 20 and the preheating unit 22 and summed up example scenario.
Table 1
Be used for preheating unit 22 burnings at top gas to be used for temperature increase Δ T
1Situation in, the prerequisite of top gas is and Δ T
1In direct ratio.
Can find out the remarkable increase of specified output work from secondary series to last row, and the therefore remarkable increase of the expansion efficiency of predetermined amount of flow top gas.
Last row are effects of the preheating energy of expression introducing.With reference to situation is to be heated to such temperature, and under this temperature, expanding causes that turbine-exit temperature is reduced to the turbine inlet temperature.For each situation, relative " cold " turbo, specified output work increases and the influence of relevant temperature increase (and therefore heating) forms in preheating the unit, and the behavior is with identical with reference to situation.Increased value has shown that the increase (and therefore increase of turbine inlet temperature) of preheating causes efficient to increase.
Further improvement in performance can obtain through water being injected the well heater that can expect.Certainly, water evaporation and the overheated corresponding increase of following the preheating energy requirement, and increased the airshed in the turbo that produces output work.
Claims (3)
1. blast furnace top gas recovery system, it comprises: expansion turbine (24), blast furnace gas expand in said expansion turbine and to the load that is coupled to the turbo output shaft (30) mechanical work are provided; Top gas clean unit (12) and be connected to said expansion turbine (24) and be positioned at its upper reaches preheat unit (22); Be linked in sequence said top gas clean unit (12), preheat the pipeline system (14) of unit (22) and expansion turbine (24); It is characterized in that; Heat exchanger is arranged in said top gas clean unit (12) and preheats unit (22) intermediary pipeline system so that heating furnace roof entraining air stream with said; Wherein said heat exchanger comprises the heat release side, and the import of this heat release side is communicated with the outlet of said expansion turbine (24).
2. system according to claim 1 is characterized in that, the said unit (22) that preheats comprises at least one nozzle, so that water is injected in the clean top gas air-flow of flowing through wherein.
3. system according to claim 1 and 2 is characterized in that, said blast furnace furnace roof entraining air stream be the steam-laden state and/or contain water droplet.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| LU91604 | 2009-09-04 | ||
| LU91604A LU91604B1 (en) | 2009-09-04 | 2009-09-04 | Recovery of energy from blast furnace gas in an expansion turbine. |
| PCT/EP2010/062960 WO2011026940A1 (en) | 2009-09-04 | 2010-09-03 | Recovery of energy from blast furnace gas in an expansion turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202595161U true CN202595161U (en) | 2012-12-12 |
Family
ID=41258878
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010900011266U Expired - Fee Related CN202595161U (en) | 2009-09-04 | 2010-09-03 | Blast furnace top gas recovery system |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN202595161U (en) |
| LU (1) | LU91604B1 (en) |
| WO (1) | WO2011026940A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574310A (en) * | 2014-08-19 | 2017-04-19 | 保尔伍斯股份有限公司 | Blast furnace plant |
| CN108590780A (en) * | 2018-05-23 | 2018-09-28 | 湖北新冶钢特种钢管有限公司 | A kind of TRT units Import Gas pre-heating system and its application method |
| WO2024021156A1 (en) * | 2022-07-29 | 2024-02-01 | 上海安可科技股份有限公司 | High-position feeding system and feeding method of converter |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI20115541L (en) * | 2011-06-03 | 2012-12-04 | Waertsilae Finland Oy | Exhaust gas system and method for reducing exhaust gas temperature |
| CN102304595B (en) * | 2011-09-23 | 2013-10-30 | 中冶南方工程技术有限公司 | Top gas pressure recovery turbine generating system |
| CN102352784A (en) * | 2011-10-28 | 2012-02-15 | 西安陕鼓动力股份有限公司 | Power generating set combining iron-making blast furnace and sintered energy recycling |
| LU91917B1 (en) * | 2011-12-16 | 2013-06-17 | Wurth Paul Sa | Cold wind generation from slag heat |
| CN103615322B (en) * | 2013-11-20 | 2016-01-20 | 内蒙古包钢钢联股份有限公司 | TRT unit overspeed control system and hypervelocity controlling method thereof |
| DE102013113950A1 (en) * | 2013-12-12 | 2015-06-18 | Thyssenkrupp Ag | Plant network for steelmaking and process for operating the plant network |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54115605A (en) * | 1978-02-28 | 1979-09-08 | Mitsui Eng & Shipbuild Co Ltd | Recovering method for energy of blast furnace top gas |
| JPS5514807A (en) * | 1978-07-13 | 1980-02-01 | Nippon Kokan Kk <Nkk> | Recovering method for heat energy from top gas of blast furnace |
| SU1177351A2 (en) * | 1982-12-24 | 1985-09-07 | Запорожский индустриальный институт | Blast furnace gas heating arrangement |
| JPS6274009A (en) | 1985-09-27 | 1987-04-04 | Sumitomo Metal Ind Ltd | Method for generating electric power by recovery of pressure from top of blast furnace |
| JPS62185810A (en) * | 1986-02-12 | 1987-08-14 | Sumitomo Metal Ind Ltd | Device for recovering heat energy of blast furnace gas |
-
2009
- 2009-09-04 LU LU91604A patent/LU91604B1/en active
-
2010
- 2010-09-03 CN CN2010900011266U patent/CN202595161U/en not_active Expired - Fee Related
- 2010-09-03 WO PCT/EP2010/062960 patent/WO2011026940A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106574310A (en) * | 2014-08-19 | 2017-04-19 | 保尔伍斯股份有限公司 | Blast furnace plant |
| CN108590780A (en) * | 2018-05-23 | 2018-09-28 | 湖北新冶钢特种钢管有限公司 | A kind of TRT units Import Gas pre-heating system and its application method |
| WO2024021156A1 (en) * | 2022-07-29 | 2024-02-01 | 上海安可科技股份有限公司 | High-position feeding system and feeding method of converter |
Also Published As
| Publication number | Publication date |
|---|---|
| LU91604B1 (en) | 2011-03-07 |
| WO2011026940A1 (en) | 2011-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202595161U (en) | Blast furnace top gas recovery system | |
| US7665291B2 (en) | Method and system for heat recovery from dirty gaseous fuel in gasification power plants | |
| US8647113B2 (en) | Method for manufacturing a cement clinker, and cement clinker manufacturing facility | |
| EP0571233A2 (en) | Staged furnaces for firing coal pyrolysis gas and char | |
| CN105518258B (en) | Gas turbine unit and operating method thereof | |
| EP2433050B1 (en) | Heat recovery system and method | |
| CN103814265B (en) | Grind the method and system of the fuel for oxy-fuel combustion burner | |
| RU2009117816A (en) | METHOD AND DEVICE FOR PRODUCING MELTED MATERIAL | |
| CN106957541A (en) | The carbon black energy-saving production method and device of a kind of outer pre-heating technique air of line | |
| CN1009658B (en) | Combustion air preheating | |
| US8621872B2 (en) | Method and device for utilising biomass | |
| KR101609817B1 (en) | Biomass syngas purification process under positive pressure for producing oil and system configuration thereof | |
| JPS58143129A (en) | Combined gas and steam turbine process | |
| CN102620569B (en) | Resource cyclic utilization system of industrial kiln | |
| EP3237343B1 (en) | Optimized process and installation for melting vitrifiable material in a flame-fired furnace | |
| US3552122A (en) | Process for the utilization of the exhausted gases from an ethylene oxide synthesis reactor | |
| US20220333529A1 (en) | Steam cycle methods, systems, and appparatus for efficiently reducing carbon footprints in plant systems | |
| RU2553160C2 (en) | Energy extraction from gases in blast-furnace unit | |
| RU2387847C1 (en) | Steam gas plant with coal pyrolysis | |
| CN110966059B (en) | Coal-fired power generation system and method | |
| US1997229A (en) | Heat exchange plant | |
| JP2002249785A (en) | Coal-gasification apparatus and method for starting the same | |
| JP5790045B2 (en) | Hot air generator | |
| US2411294A (en) | Thermal power plant | |
| CN202709137U (en) | Novel three-air recovery device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121212 Termination date: 20170903 |