CN207002775U - A kind of hot blast stove system of blast furnace - Google Patents

A kind of hot blast stove system of blast furnace Download PDF

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Publication number
CN207002775U
CN207002775U CN201720944926.5U CN201720944926U CN207002775U CN 207002775 U CN207002775 U CN 207002775U CN 201720944926 U CN201720944926 U CN 201720944926U CN 207002775 U CN207002775 U CN 207002775U
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China
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hot
blast stove
flue gas
heat exchange
valve
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CN201720944926.5U
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冯燕波
全强
龚必侠
陈秀娟
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MCC Capital Engineering and Research Incorporation Ltd
Zhongye Jingcheng Engineering Technology Co Ltd
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Zhongye Jingcheng Engineering Technology Co Ltd
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Abstract

The utility model provides a kind of hot blast stove system of blast furnace, including multiple hot-blast stoves, multiple first heat exchange units, at least one second heat exchange unit, auxiliary combustion equipment, chimney, air is responsible for, coal gas is responsible for and flue gas supervisor, multiple hot-blast stoves are corresponded with multiple first heat exchange units and set, each hot-blast stove is responsible for respectively by corresponding first heat exchange unit with flue gas and coal gas supervisor connects with one in air supervisor, and each hot-blast stove is responsible for by the second heat exchange unit with flue gas and coal gas supervisor connects with another in air supervisor, flue gas supervisor connects with chimney, air supervisor connects with auxiliary combustion equipment.The utility model can be preheated at least one of coal gas and combustion air using the flue gas of single hot-blast stove, the heat of the flue gas with high temperature caused by latter stage burning can effectively be utilized, so that coal gas and/or combustion air reach 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.

Description

A kind of hot blast stove system of blast furnace
Technical field
Blast furnace in metallurgical industry hot-blast stove technical field is the utility model is related to, refers in particular to a kind of hot-blast stove system of blast furnace System.
Background technology
In metallurgy industry, it is an energy-saving effective ways of blast furnace ironmaking to improve hot blast temperature, and wind-warm syndrome often improves 100 DEG C, iron coke per ton ratio can reduce about 20kg, injecting coal quantity improves about 50kg, yield increase about 4%.Therefore, major iron and steel enterprise is all Hot blast temperature how will be improved it is considered as a highly important technology and will be studied.
It is to improve the dome temperature of hot-blast stove to improve the most direct means of hot blast temperature.Due to blast furnace caused by blast furnace ironmaking Calorific value of gas is relatively low, uses blast furnace gas relatively low for the general dome temperature of the hot-blast stove of fuel, it is difficult to obtain higher hot blast temperature Degree.Therefore, a part of iron and steel enterprise mixes a small amount of high heating value gas (such as coke-stove gas, coal gas of converter, day in blast furnace gas Right gas etc.) carry out burning stove.For enterprise, although higher hot blast temperature can be obtained, add and be worth higher high fever It is worth the dosage of coal gas, is not optimal burning stove scheme.
Another approach for improving dome temperature is that the blast furnace gas and combustion air that will burn stove are preheated, physical thermal The theoretical temperature combustion brought into when making burning improve, so as to obtain higher dome temperature.Conventional method has:1st, using attached High-temperature flue gas caused by preheating furnace or front combustion is added to carry out high temperature preheating to combustion air;2nd, using caused by hot-blast stove Flue gas carries out low-temperature prewarming by heat exchanger to combustion air and coal gas.Method 1 needs extra consumption big in process of production The blast furnace gas of amount, it is not a kind of cost-effective method;Method 2 is effectively utilized flue gas waste heat caused by hot-blast stove, Coal gas is not consumed additionally again, improves the dome temperature of hot-blast stove to a certain extent;But due to the limitation that system is set, still deposit Very big the drawbacks of:In the prior art, 3~4 hot-blast stoves are commonly equipped with per seat height stove, in process of production each hot-blast stove production Raw flue gas is mixed in together, and coal gas and combustion air are preheated using mixing flue gas, wherein, each hot blast Be in the combustion process of stove early stage burn stove caused by flue gas temperature it is relatively low, and burn flue gas temperature caused by stove latter stage compared with Height, because each hot-blast stove is not to burn heater stage or latter stage burning heater stage in early stage simultaneously, therefore each hot-blast stove is useless When flue gas mixes, the heat of the higher flue gas of temperature can pass to the relatively low flue gas of temperature so that mix the temperature of flue gas Spend and individually utilized for average value, the heat of flue gas that can not be higher to temperature, carried out in advance to coal gas and combustion air Be only capable of coal gas and combustion air being preheating to 170 DEG C~210 DEG C when hot, the hot blast temperature in hot-blast stove not over 1240 DEG C, For need not be too for burning early stage of high-temperature, without coal gas and combustion air are preheating into 170 DEG C~210 DEG C, therefore Partial heat is caused to be wasted, and for the higher latter stage burning of required temperature, coal gas and combustion air are preheating to 170 DEG C~210 DEG C when preheating temperature again it is inadequate, can not further improve the dome temperature and hot blast temperature of hot-blast stove, therefore, how It is those skilled in the art's urgent problem to be solved that the more efficient heat using flue gas of energy, which improves hot blast temperature,.
Utility model content
The purpose of this utility model is to provide a kind of hot blast stove system of blast furnace, in the flue gas using hot-blast stove to coal gas When being preheated with combustion air, at least one of coal gas and combustion air are carried out in advance using the flue gas of single hot-blast stove Heat, in latter stage combustion process, can effectively using latter stage burning caused by with high temperature flue gas heat, not with its Directly coal gas and/or combustion air are preheated in the state of the flue gas mixing of his hot-blast stove so that coal gas and/or combustion-supporting Air reaches 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.
To reach above-mentioned purpose, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the heat of the blast furnace Furnace system includes multiple hot-blast stoves, multiple first heat exchange units, at least one second heat exchange unit, auxiliary combustion equipment, chimney, sky Gas supervisor, coal gas supervisor and flue gas supervisor, multiple hot-blast stoves are corresponded with multiple first heat exchange units and set, respectively The hot-blast stove is connected by corresponding first heat exchange unit with flue gas supervisor respectively, and each hot-blast stove is logical Cross second heat exchange unit to connect with flue gas supervisor, the flue gas supervisor connects with the chimney, each hot-blast stove Respectively by corresponding first heat exchange unit and the air be responsible for and coal gas supervisor in one connect, and each institute State hot-blast stove by second heat exchange unit and the air be responsible for and coal gas supervisor in another connect, it is described Air supervisor connects with the auxiliary combustion equipment, and the auxiliary combustion equipment is passed through combustion air in being responsible for the air.
The hot blast stove system of blast furnace as described above, wherein, second heat exchange unit be provided with it is multiple, multiple described second Heat exchange unit is corresponded with multiple hot-blast stoves and set, and each hot-blast stove is single by corresponding second heat exchange respectively It is first to be connected with the chimney, and each hot-blast stove be responsible for respectively by corresponding second heat exchange unit and the air and Another connection in the coal gas supervisor.
The hot blast stove system of blast furnace as described above, wherein, second heat exchange unit is provided with one, each hot-blast stove Connected by second heat exchange unit with the chimney, and each hot-blast stove passes through second heat exchange unit and institute State another connection in air supervisor and coal gas supervisor.
The hot blast stove system of blast furnace as described above, wherein, first heat exchange unit is air heat-exchange unit, described the Two heat exchange units are coal gas heat exchange unit, and each hot-blast stove passes through corresponding first heat exchange unit and the air respectively Supervisor's connection, and each hot-blast stove is connected by second heat exchange unit with coal gas supervisor.
The hot blast stove system of blast furnace as described above, wherein, first heat exchange unit is coal gas heat exchange unit, described the Two heat exchange units are air heat-exchange unit, and each hot-blast stove passes through corresponding first heat exchange unit and the coal gas respectively Supervisor's connection, and each hot-blast stove is connected by second heat exchange unit with air supervisor.
The hot blast stove system of blast furnace as described above, wherein, first heat exchange unit include First Heat Exchanger, first Pipe and the first fume pipe, first branch pipe run through the First Heat Exchanger, and described first with first fume pipe Pipe be arranged in parallel with first fume pipe,
One end of first branch pipe connects with the corresponding hot-blast stove, the other end and the coal of first branch pipe Gas is responsible for or air supervisor's connection, is set on first branch pipe between the hot-blast stove and the First Heat Exchanger There is the first outflow valve, between coal gas supervisor and the First Heat Exchanger or air supervisor exchanges heat with described first First branch pipe between device is provided with first and flows into valve,
One end of first fume pipe connects with the corresponding hot-blast stove, the other end of first fume pipe and institute Flue gas supervisor's connection is stated, first fume pipe between the hot-blast stove and the First Heat Exchanger is provided with the first cigarette Gas flows into valve, and first fume pipe between flue gas supervisor and the First Heat Exchanger is provided with the first flue gas stream Go out valve.
The hot blast stove system of blast furnace as described above, wherein, first heat exchange unit also includes the first bypass pipe and the One flue gas bypass pipe, one end of first bypass pipe between the described first outflow valve and the hot-blast stove with described first Pipe connects, and the other end of first bypass pipe is responsible in the coal gas between the first inflow valve or the air is responsible for Connected between the described first inflow valve with first branch pipe, first bypass pipe is provided with the first by-passing valve;Described One end of one flue gas bypass pipe flows between valve and the hot-blast stove in first flue gas and connected with first fume pipe, institute The other end for stating the first flue gas bypass pipe is responsible between first flue gas outflow valve and first flue gas in the flue gas Pipe connects, and the first flue gas bypass pipe is provided with the first flue gas by-passing valve;
Described first between the junction and the hot-blast stove of first branch pipe and first bypass pipe Pipe is provided with the first regulating valve, and first branch pipe between first regulating valve and the hot-blast stove is provided with first Combustion valve;
Described between first fume pipe and the first flue gas bypass pipe junction and the hot-blast stove One fume pipe is provided with the first flue gas shut-off valve.
The hot blast stove system of blast furnace as described above, wherein, second heat exchange unit include the second heat exchanger, second Pipe and the second fume pipe, second branch pipe run through second heat exchanger, and described second with second fume pipe Pipe be arranged in parallel with second fume pipe,
One end of second branch pipe is connected with the hot-blast stove, and the other end and the coal gas of second branch pipe are responsible for Or the air supervisor connection, second branch pipe between the hot-blast stove and second heat exchanger are provided with second Valve is flowed out, between coal gas supervisor and second heat exchanger or between air supervisor and second heat exchanger Second branch pipe be provided with second flow into valve,
One end of second fume pipe connects with the hot-blast stove, the other end and the flue gas of second fume pipe Supervisor's connection, second fume pipe between the hot-blast stove and second heat exchanger flow into provided with the second flue gas Valve, second fume pipe between flue gas supervisor and second heat exchanger are provided with the second flue gas outflow valve.
The hot blast stove system of blast furnace as described above, wherein, second heat exchange unit also includes the second bypass pipe and the Two flue gas bypass pipes, one end of second bypass pipe between the described second outflow valve and the hot-blast stove with described second Pipe connects, and the other end of second bypass pipe is responsible in the coal gas between the second inflow valve or the air is responsible for Connected between the described second inflow valve with second branch pipe, second bypass pipe is provided with the second by-passing valve;Described One end of two flue gas bypass pipes flows between valve and the hot-blast stove in second flue gas and connected with second fume pipe, institute The other end for stating the second flue gas bypass pipe is responsible between second flue gas outflow valve and second flue gas in the flue gas Pipe connects, and the second flue gas bypass pipe is provided with the second flue gas by-passing valve;
Described second between the junction and the hot-blast stove of second branch pipe and second bypass pipe Pipe is provided with the second regulating valve, and second branch pipe between second regulating valve and the hot-blast stove is provided with second Combustion valve;
Described between second fume pipe and the second flue gas bypass pipe junction and the hot-blast stove Two fume pipes are provided with the second flue gas shut-off valve.
The hot blast stove system of blast furnace as described above, wherein, the auxiliary combustion equipment helps including the first combustion fan with second Blower fan is fired, first combustion fan is connected by the first air hose with air supervisor, and second combustion fan passes through Second air hose connects with air supervisor, and first air hose is provided with the first valve, is set on second air hose There is the second valve.
Compared with prior art, it is as follows the advantages of the utility model:
1. of the present utility model set by setting multiple first heat exchange units to be corresponded with multiple hot-blast stoves, can be effective Ensure coal gas with combustion air it is a kind of can using only heat caused by the flue gas of corresponding hot-blast stove, without Mixed with the flue gas of other hot-blast stoves, when burning in latter stage, substantial amounts of heat that latter stage combustion zone comes can effectively by coal gas or Combustion air is preheating to 280 DEG C~310 DEG C, can effectively improve the dome temperature and hot blast temperature of hot-blast stove;
2. the utility model is additionally provided with least one second heat exchange unit, when the quantity phase of the second heat exchange unit and hot-blast stove Deng when, it is identical with the set-up mode of the first heat exchange unit, each hot-blast stove is only connected with second heat exchange unit, now, First heat exchange unit and the second heat exchange unit can be only with the flue gas in corresponding hot-blast stove simultaneously to coal gas and combustion-supporting sky Gas is preheated, and when burning in latter stage, the substantial amounts of heat that latter stage combustion zone comes can be effectively simultaneously pre- with combustion air by coal gas Heat is to 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.
In summary, the flue gas that the utility model can be at least one of coal gas and combustion air using single hot-blast stove Preheated, in latter stage combustion process, can effectively utilize the heat of the flue gas with high temperature caused by latter stage burning, Directly coal gas and/or combustion air are preheated in the state of not mixed with the flue gas of other hot-blast stoves so that coal gas and/ Or combustion air reaches 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.
Brief description of the drawings
The following drawings is only intended to, in doing the utility model schematic illustration and explanation, not limit model of the present utility model Enclose.Wherein:
Fig. 1 is the structural representation of the hot blast stove system of blast furnace provided by the utility model;
Fig. 2 is another structural representation of the hot blast stove system of blast furnace provided by the utility model;
Fig. 3 is another structural representation of the hot blast stove system of blast furnace provided by the utility model;
Fig. 4 is the another structural representation of the hot blast stove system of blast furnace provided by the utility model.
Drawing reference numeral explanation:
1 hot-blast stove
2 first heat exchange units
21 First Heat Exchangers
22 first branch pipes
221 first flow into valve
222 first outflow valves
223 first regulating valves
224 first combustion valves
225 first shut-off valves
23 first fume pipes
231 first flue gases flow into valve
232 first flue gases flow out valve
233 first flue gas shut-off valves
24 first bypass pipes
241 first by-passing valves
25 first flue gas bypass pipes
251 first flue gas by-passing valves
3 second heat exchange units
31 second heat exchangers
32 second branch pipes
321 second flow into valve
322 second outflow valves
323 second regulating valves
324 second combustion valves
325 second shut-off valves
33 second fume pipes
331 second flue gases flow into valve
332 second flue gases flow out valve
333 second flue gas shut-off valves
34 second bypass pipes
341 second by-passing valves
35 second flue gas bypass pipes
351 second flue gas by-passing valves
4 auxiliary combustion equipments
41 first combustion fans
42 first air hoses
421 first valves
43 second combustion fans
44 second air hoses
441 second valves
5 chimneys
6 air are responsible for
7 coal gas are responsible for
8 flue gases are responsible for
Embodiment
In order to have clearer understanding to the technical solution of the utility model, purpose and effect, in conjunction with brief description of the drawings originally The embodiment of utility model.
As shown in Fig. 1~Fig. 2, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the hot-blast stove of blast furnace System include multiple hot-blast stoves 1, multiple first heat exchange units 2, at least one second heat exchange unit 3, auxiliary combustion equipment 4, chimney 5, Air supervisor 6, coal gas supervisor 7 and flue gas supervisor 8, multiple hot-blast stoves 1 are corresponded with multiple first heat exchange units 2 and set, respectively Hot-blast stove 1 is connected by corresponding first heat exchange unit 2 with flue gas supervisor 8 respectively, and each hot-blast stove 1 is single by the second heat exchange Member 3 connects with flue gas supervisor 8, and flue gas supervisor 8 connects with chimney 5, and each hot-blast stove 1 passes through corresponding first heat exchange unit 2 respectively Connected with one in air supervisor 6 and coal gas supervisor 7, and each hot-blast stove 1 passes through the second heat exchange unit 3 and air supervisor 6 And another connection in coal gas supervisor 7, it can thus be seen that for the first heat exchange unit 2, into each first heat exchange The flue gas of unit 2 is flue gas caused by corresponding hot-blast stove 1, the flue gas not with other hot-blast stoves 1 caused by Flue gas mixes, and in latter stage combustion process, the temperature of flue gas is higher than the temperature for mixing flue gas in the prior art, can incite somebody to action Coal gas is preheating to 280 DEG C~310 DEG C with one kind in combustion air, far above 170 DEG C~210 DEG C of prior art, in this base On plinth, no matter the set-up mode of the second heat exchange unit 3 and each hot-blast stove 1 be it is same as the prior art or with the first heat exchange unit 2 set-up mode is identical, because coal gas and a kind of temperature in combustion air greatly improve, hot-blast stove compared with prior art Dome temperature and hot blast temperature in 1 are significantly improved, that is, the utility model are disappeared not increasing energy source and power Consumption, can be effectively using the fume afterheat of different phase in the hot blast stove burning cycle, and the highest for improving coal gas and/or combustion air is pre- Hot temperature, so as to improve dome temperature, obtain high warm air;Air supervisor 6 connects with auxiliary combustion equipment 4, and auxiliary combustion equipment 4 can be to air Combustion air, coal gas supervisor 7 and existing gas supply system connectivity are passed through in supervisor 6, coal gas is connected with coal gas supervisor 7.
Wherein, hot-blast stove 1 can be the multi-forms such as top ignition, external-burning, internal combustion type or pebble stove, and hot blast Stove 1 can be that 2,3,4 or other quantity, the utility model are not limited thereto.
Further, as shown in Figures 3 and 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the The set-up mode of one heat exchange unit 2 is as described above, will not be repeated here, on this basis, the second heat exchange unit 3 be provided with it is multiple, Multiple second heat exchange units 3 are corresponded with multiple hot-blast stoves 1 and set, and each hot-blast stove 1 is single by the corresponding second heat exchange respectively Member 3 connects with chimney 5, and each hot-blast stove 1 is respectively by corresponding second heat exchange unit 3 and air supervisor 6 and coal gas supervisor 7 Another connection.That is the second heat exchange unit 3 is identical with the set-up mode of the first heat exchange unit 2, single into each second heat exchange The flue gas of member 3 be also corresponding to flue gas caused by hot-blast stove 1, the flue gas with other hot-blast stoves 1 caused by it is useless Flue gas mixes, and in latter stage combustion process, the temperature of flue gas is higher than the temperature for mixing flue gas in the prior art, can be by coal gas 280 DEG C~310 DEG C are also preheating to the another kind in combustion air, that is to say, that flue gas point caused by each hot-blast stove 1 For two parts, a part flows into the another part of the first heat exchange unit 2 and flows into the second heat exchange unit 3, while to combustion air and coal Gas is preheated, and coal gas and combustion air is preheating into 280 DEG C~310 DEG C, so as to further improve in hot-blast stove 1 Dome temperature and hot blast temperature, be arranged such available 1300 DEG C stable hot blasts.
Further, as shown in figure 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the first heat exchange The set-up mode 2 of unit is as described above, will not be repeated here, and on this basis, the second heat exchange unit 3 is provided with one, each hot blast Stove 1 is connected by the second heat exchange unit 3 with chimney 5, and each hot-blast stove 1 by the second heat exchange unit 3 and air supervisor 6 and Another connection in coal gas supervisor 7.It is to make to give up caused by each hot-blast stove 1 when second heat exchange unit 3 is arranged such Flue gas some flow to same second heat exchange unit 3, it is understood that be, flow into the second heat exchange unit 3 flue gas be The mixture of flue gas caused by each hot-blast stove 1, such a set-up mode, compared with prior art, equivalent to passing through first Gas (combustion air and one kind in coal gas) temperature that heat exchange unit 2 is preheated is greatly improved to 280 DEG C~310 DEG C, and Gas (combustion air and the another kind in coal gas) the basic holding 170 DEG C~210 preheated by the second heat exchange unit 3 DEG C, 1270 DEG C of hot blast can be obtained by being arranged such, and also be improved compared with prior art, by the second heat exchange unit 3 It is arranged to a building block that can effectively reduce the application, so as to reducing the area of occupancy and manufacturing cost.
In summary, the set-up mode of the second heat exchange unit 3 can only set one, can also be according to the number of hot-blast stove 1 Amount, it is set to correspond setting with hot-blast stove 1, two ways can reach the effect for improving hot blast temperature, and the utility model is simultaneously It is not limited.
Further, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the first heat exchange unit 2 is Air heat-exchange unit, the second heat exchange unit 3 are coal gas heat exchange unit, and each hot-blast stove 1 passes through corresponding first heat exchange unit 2 respectively Connected with air supervisor 6, and each hot-blast stove 1 is connected by the second heat exchange unit 3 with coal gas supervisor 7, is arranged such and be can guarantee that It can be preheated into the combustion air in each hot-blast stove 1 by higher temperature, 280 DEG C~310 DEG C can be reached;If second changes Hot cell 3 is arranged to one, then is essentially 170 DEG C~210 DEG C into the temperature after the gas preheating in each hot-blast stove 1, if Second heat exchange unit 3 corresponds with each hot-blast stove 1 to be set, then also can be by higher temperatures into the coal gas in each hot-blast stove 1 The preheating of degree, 280 DEG C~310 DEG C can be reached, it can be understood as, in latter stage combustion process, combustion air has higher pre- Hot temperature, and the preheating temperature of coal gas is varied from according to the set-up mode of the second heat exchange unit 3.
Further, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the first heat exchange unit 2 is Coal gas heat exchange unit, the second heat exchange unit 3 are air heat-exchange unit, and each hot-blast stove 1 passes through corresponding first heat exchange unit 2 respectively Connected with coal gas supervisor 7, and each hot-blast stove 1 is connected by the second heat exchange unit 3 with air supervisor 6.Such a set-up mode is It is to exchange coal gas and combustion air, coal gas is preheated by the first heat exchange unit 2, and combustion air passes through the second heat exchange Unit 3 is preheated, and in latter stage combustion process, coal gas can have a higher preheating temperature, and the preheating temperature of combustion air It is varied from according to the set-up mode of the second heat exchange unit 3.
Further, as shown in Figure 1 to 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, the One heat exchange unit 2 includes First Heat Exchanger 21, the first branch pipe 22 and the first fume pipe 23, the first branch pipe 22 and the first fume pipe 23 Run through First Heat Exchanger 21, and the first branch pipe 22 be arranged in parallel with the first fume pipe 23, the gas (coal gas in the first branch pipe 22 Or combustion air) exchanged heat with the flue gas in the first fume pipe 23 in the inside of First Heat Exchanger 21, the heat transfer of flue gas To the gas in the first branch pipe 22;
One end of first branch pipe 22 connects with the top of corresponding hot-blast stove 1, the other end and the coal gas master of the first branch pipe 22 Pipe 7 or the connection of air supervisor 6, the first branch pipe 22 between hot-blast stove 1 and First Heat Exchanger 21 are provided with the first outflow valve 222, the first branch pipe 22 between coal gas supervisor 7 and First Heat Exchanger 21 or between air supervisor 6 and First Heat Exchanger 21 It is provided with first and flows into valve 221, coal gas or combustion air, which enter after the first branch pipe 22, is flowed through the first inflow valve 221 and enter to first In heat exchanger 21, flowed out after being exchanged heat with flue gas in the First Heat Exchanger 21 from First Heat Exchanger 21, and flow through it is first-class go out Valve 222 is flowed into hot-blast stove 1 along the first branch pipe 22, and manual operation is easy in the setting that the first inflow valve 221 and first flows out valve 222 Supply to gas switchs, meanwhile, being flowed out in the first inflow valve 221 and first can also be right in the state of valve 222 is all closed First Heat Exchanger 21 is overhauled;
One end of first fume pipe 23 connects with the bottom of corresponding hot-blast stove 1, the other end and cigarette of the first fume pipe 23 The connection of gas supervisor 8, the first fume pipe 23 between hot-blast stove 1 and First Heat Exchanger 21 are provided with the first flue gas and flow into valve 231, the first fume pipe 23 between flue gas supervisor 8 and First Heat Exchanger 21 is provided with the first flue gas outflow valve 232, hot blast Flue gas in stove 1 is entered in First Heat Exchanger 21 after flowing into the first fume pipe 23 through the first flue gas inflow valve 231, first Flow out from First Heat Exchanger 21 after being exchanged heat in heat exchanger 21 with the gas in the first branch pipe 22, and flowed out through the first flue gas Valve 232 is flowed into flue gas supervisor 8 along the first fume pipe 23, the flue gas of the first fume pipe 23 outflow of each first heat exchange unit 2 Flow into flue gas supervisor 8, and enter from flue gas supervisor 8 in chimney 5 and discharged.
Further, as shown in Figure 1 to 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, First heat exchange unit 2 also includes the first bypass pipe 24 and the first flue gas bypass pipe 25, and one end of the first bypass pipe 24 is in first-class Go out between valve 222 and hot-blast stove 1 and connected with the first branch pipe 22, the other end of the first bypass pipe 24 in coal gas supervisor 7 with it is first-class Enter between valve 221 or the inflow valve 221 of air supervisor 6 and first between connected with the first branch pipe 22, the first bypass pipe 24 is provided with First by-passing valve 241;One end of first flue gas bypass pipe 25 in the first flue gas flow between valve 231 and hot-blast stove 1 with the first cigarette Tracheae 23 connects, the other end of the first flue gas bypass pipe 25 between flue gas supervisor 8 and the first flue gas outflow valve 232 with the first cigarette Tracheae 23 connects, and the first flue gas bypass pipe 25 is provided with the first flue gas by-passing valve 251;First bypass pipe 24 equivalent to first Pipe 22 is in parallel, and the first flue gas bypass pipe 25 occurs blocking or broken equivalent in parallel with the first fume pipe 23 in the first branch pipe 22 During situations such as damage cisco unity malfunction, by operating the first by-passing valve 241 coal gas or combustion air can be made to pass through the first bypass Pipe 24 is entered in hot-blast stove 1, similarly, the first fume pipe 23 occurs blocking or is damaged situations such as during cisco unity malfunction, By operating the first flue gas by-passing valve 251 flue gas can be made to be expelled to by the first flue gas bypass pipe 25 in flue gas supervisor 8, will Flue gas in hot-blast stove 1 is discharged in time, prevents the pressure in hot-blast stove 1 excessive, it is necessary to explanation, the first branch pipe 22 with In the case of the normal work of first fume pipe 23, the first by-passing valve 241 and the first flue gas by-passing valve 251 are in closed mode, To ensure to enter after coal gas or combustion air are preheated hot-blast stove 1, and ensure that the flue gas in hot-blast stove 1 can enter first Preheating in fume pipe 23 for coal gas or combustion air provides heat;
The first branch pipe 22 between the junction and hot-blast stove 1 of the first branch pipe 22 and the first bypass pipe 24 is provided with the One regulating valve 223, the logical flow for setting the first regulating valve 223 to adjust the coal gas being passed through in hot-blast stove 1 or combustion air, is located at The first branch pipe 22 between first regulating valve 223 and hot-blast stove 1 is provided with the first combustion valve 224 (i.e. switch valve), passes through setting First combustion valve 224 can control beginning or stop being passed through coal gas or combustion air into hot-blast stove 1;
On the first fume pipe 23 between the first fume pipe 23 and the junction of the first flue gas bypass pipe 25 and hot-blast stove 1 Provided with the first flue gas shut-off valve 233, by setting the first flue gas shut-off valve 233 can be according to the spirit of the factors such as the pressure in hot-blast stove 1 Control living starts or stops being passed through flue gas into the first fume pipe 23.
Further, as shown in Figure 1 to 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, Second heat exchange unit 3 includes the second heat exchanger 31, the second branch pipe 32 and the second fume pipe 33, the second branch pipe 32 and the second fume pipe 33 run through the second heat exchanger 31, and the second branch pipe 32 be arranged in parallel with the second fume pipe 33, the gas (coal in the second branch pipe 32 Gas or combustion air) exchanged heat with the flue gas in the second fume pipe 33 in the inside of the second heat exchanger 31, the heat of flue gas passes Pass the gas in the second branch pipe 32;
One end of second branch pipe 32 connects with the top of hot-blast stove 1, the other end and the coal gas supervisor 7 or empty of the second branch pipe 32 The connection of gas supervisor 6, the second branch pipe 32 between the heat exchanger 31 of hot-blast stove 1 and second are provided with the second outflow valve 322, are located at 7 and second the second branch pipe 32 between heat exchanger 31 or between air supervisor 6 and the second heat exchanger 31 of coal gas supervisor is provided with the Two flow into valves 321, and coal gas or combustion air, which enter after the second branch pipe 32, to be flowed through the second inflow valve 321 and enter to the second heat exchanger 31 In, flowed out after being exchanged heat in the second heat exchanger 31 with flue gas from the second heat exchanger 31, and flow through second and go out valve 322 along the Two branch pipes 32 are flowed into hot-blast stove 1, and the setting that the second inflow valve 321 and second flows out valve 322 is easy to manual operation to gas Supply is switched, meanwhile, flow out in the second inflow valve 321 and second and can also be exchanged heat in the state of valve 322 is all closed to second Device 31 is overhauled;
One end of second fume pipe 33 connects with the bottom of hot-blast stove 1, the other end and the flue gas supervisor 8 of the second fume pipe 33 Connection, the second fume pipe 33 between the heat exchanger 31 of hot-blast stove 1 and second are provided with the second flue gas and flow into valve 331, be located at Flue gas supervisor 8 and second the second fume pipe 33 between heat exchanger 31 are provided with the second flue gas outflow valve 332, in hot-blast stove 1 Flue gas is entered in the second heat exchanger 31 after flowing into the second fume pipe 33 through the second flue gas inflow valve 331, in the second heat exchanger Flowed out after being exchanged heat in 31 with the gas in the second branch pipe 32 from the second heat exchanger 31, and valve 332 is flowed out through the second flue gas Flowed into along the second fume pipe 33 along flue gas supervisor 8, when the second heat exchange unit 3 is set to multiple, the of each second heat exchange unit 3 The flue gas flow equalizing of two fume pipes 33 outflow enters in flue gas supervisor 8, and enters from flue gas supervisor 8 in chimney 5 and discharged;When When two heat exchange units 3 are set to one, then the second fume pipe 33 is in charge of by more while connected with each hot-blast stove 1, Ge Gere The flue gas of wind furnace 1 by it is respective be in charge of enter in the second fume pipe 33, and the after being mixed in the second fume pipe 33 Exchanged heat in two heat exchangers 31 with the gas in the second branch pipe 32.
Further, as shown in Figure 1 to 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, Second heat exchange unit 3 also includes the second bypass pipe 34 and the second flue gas bypass pipe 35, and one end of the second bypass pipe 34 is in second Go out between valve 322 and hot-blast stove 1 and connected with the second branch pipe 32, the other end of the second bypass pipe 34 is in coal gas supervisor 7 and second Enter between valve 321 or the inflow valve 321 of air supervisor 6 and second between connected with the second branch pipe 32, the second bypass pipe 34 is provided with Second by-passing valve 341;One end of second flue gas bypass pipe 35 in the second flue gas flow between valve 331 and hot-blast stove 1 with the second cigarette Tracheae 33 connects, the other end of the second flue gas bypass pipe 35 between flue gas supervisor 8 and the second flue gas outflow valve 332 with the second cigarette Tracheae 33 connects, and the second flue gas bypass pipe 35 is provided with the second flue gas by-passing valve 351;Second bypass pipe 34 equivalent to second Pipe 32 is in parallel, and the second flue gas bypass pipe 35 occurs blocking or broken equivalent in parallel with the second fume pipe 33 in the second branch pipe 32 During situations such as damage cisco unity malfunction, by operating the second by-passing valve 341 coal gas or combustion air can be made to pass through the second bypass Pipe 34 is entered in hot-blast stove 1, similarly, the second fume pipe 33 occurs blocking or is damaged situations such as during cisco unity malfunction, By operating the second flue gas by-passing valve 351 flue gas can be made to be expelled to by the second flue gas bypass pipe 35 in flue gas supervisor 8, will Flue gas in hot-blast stove 1 is discharged in time, prevents the pressure in hot-blast stove 1 excessive, it is necessary to explanation, the second branch pipe 32 with In the case of the normal work of second fume pipe 33, the second by-passing valve 341 and the second flue gas by-passing valve 351 are in closed mode, To ensure to enter after coal gas or combustion air are preheated hot-blast stove 1, and ensure that the flue gas in hot-blast stove 1 can enter second Preheating in fume pipe 33 for coal gas or combustion air provides heat;
The second branch pipe 32 between the junction and hot-blast stove 1 of the second branch pipe 32 and the second bypass pipe 34 is provided with the Two regulating valves 323, the logical flow for setting the second regulating valve 323 to adjust the coal gas being passed through in hot-blast stove 1 or combustion air, are located at The second branch pipe 32 between second regulating valve 323 and hot-blast stove 1 is provided with the second combustion valve 324 (i.e. switch valve), passes through setting Second combustion valve 324 can control beginning or stop being passed through coal gas or combustion air into hot-blast stove 1;
On the second fume pipe 33 between the second fume pipe 33 and the junction of the second flue gas bypass pipe 35 and hot-blast stove 1 Provided with the second flue gas shut-off valve 333, by setting the second flue gas shut-off valve 333 can be according to the spirit of the factors such as the pressure in hot-blast stove 1 Control living starts or stops being passed through flue gas into the second fume pipe 33, wherein it should be noted that no matter the second heat exchange unit 3 is set Be set to one be also arranged to it is multiple, the second flue gas shut-off valve 333 be correspond set, if the second heat exchange unit 3 is more It is individual, then the second flue gas shut-off valve 333 is equipped with the second fume pipe 33 of each second heat exchange unit 3, if the second heat exchange unit 3 For one, then being in charge of for the second fume pipe 33 for connecting each heat exchange unit 3 of hot-blast stove 1 and second is equipped with the second flue gas pass Disconnected valve 333, in order to individually be controlled the flue gas emission behaviour of each hot-blast stove 1.
Wherein, the connection coal gas supervisor 7 of coal gas heat exchange unit is on the pipeline of hot-blast stove 1 with being additionally provided with shut-off valve, for The in emergency circumstances supply of fast shut-off coal gas, if for example, the first heat exchange unit 2 is coal gas heat exchange unit, the first branch pipe 22 Be provided with the first shut-off valve 225, the first shut-off valve 225 between the first regulating valve 223 and the first combustion valve 224, if second Heat exchange unit 3 is coal gas heat exchange unit, then the second branch pipe 32 is provided with the second shut-off valve 325, and the second shut-off valve 325 is located at second Between the combustion valve 324 of regulating valve 323 and second.
Wherein, the heat exchanger 31 of First Heat Exchanger 21 and second can be plank frame, tubular structure, heat pipe-type (with biography Thermal medium) structure or any two kinds of structure type combination, the utility model is not limited thereto.
Further, as shown in Figure 1 to 4, the utility model provides a kind of hot blast stove system of blast furnace, wherein, help Combustion device 4 includes the first combustion fan 41 and the second combustion fan 43, and the first combustion fan 41 passes through the first air hose 42 and sky The connection of gas supervisor 6, the second combustion fan 43 are connected by the second air hose 44 with air supervisor 6, the first air hose 42 and second Air hose 44 is the equal of to be arranged in parallel, and the first combustion fan 41 and the second combustion fan 43 can be individually into air supervisors 6 Combustion air is blown into, the first air hose 42 is provided with the first valve 421, and the second air hose 44 is provided with the second valve 441, passed through First valve 421 can control the first combustion fan 41 and the second combustion fan 43 respectively with the second valve 441, by setting two Individual combustion fan can wherein one break down or carry out regular maintenance when enable another, so as to ensure hot-blast stove 1 Normal work.
Compared with prior art, it is as follows the advantages of the utility model:
1. of the present utility model set by setting multiple first heat exchange units to be corresponded with multiple hot-blast stoves, can be effective Ensure coal gas with combustion air it is a kind of can using only heat caused by the flue gas of corresponding hot-blast stove, without Mixed with the flue gas of other hot-blast stoves, when burning in latter stage, substantial amounts of heat that latter stage combustion zone comes can effectively by coal gas or Combustion air is preheating to 280 DEG C~310 DEG C, can effectively improve the dome temperature and hot blast temperature of hot-blast stove;
2. the utility model is additionally provided with least one second heat exchange unit, when the quantity phase of the second heat exchange unit and hot-blast stove Deng when, it is identical with the set-up mode of the first heat exchange unit, each hot-blast stove is only connected with second heat exchange unit, now, First heat exchange unit and the second heat exchange unit can be only with the flue gas in corresponding hot-blast stove simultaneously to coal gas and combustion-supporting sky Gas is preheated, and when burning in latter stage, the substantial amounts of heat that latter stage combustion zone comes can be effectively simultaneously pre- with combustion air by coal gas Heat is to 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.
In summary, the flue gas that the utility model can be at least one of coal gas and combustion air using single hot-blast stove Preheated, in latter stage combustion process, can effectively utilize the heat of the flue gas with high temperature caused by latter stage burning, Directly coal gas and/or combustion air are preheated in the state of not mixed with the flue gas of other hot-blast stoves so that coal gas and/ Or combustion air reaches 280 DEG C~310 DEG C, so as to further improve the dome temperature and hot blast temperature of hot-blast stove.
The schematical embodiment of the utility model is the foregoing is only, is not limited to model of the present utility model Enclose.Any one of ordinary skill in the art, it is made etc. on the premise of design of the present utility model and principle is not departed from With change and modification, the scope that the utility model is protected all should be belonged to.

Claims (10)

1. a kind of hot blast stove system of blast furnace, it is characterised in that the hot blast stove system of the blast furnace includes multiple hot-blast stoves, multiple First heat exchange unit, at least one second heat exchange unit, auxiliary combustion equipment, chimney, air supervisor, coal gas supervisor and flue gas supervisor, Multiple hot-blast stoves are corresponded with multiple first heat exchange units and set, and each hot-blast stove passes through corresponding institute respectively State the first heat exchange unit to connect with flue gas supervisor, and each hot-blast stove passes through second heat exchange unit and the cigarette Gas supervisor's connection, the flue gas supervisor connect with the chimney, and each hot-blast stove passes through corresponding first heat exchange respectively Unit and the air be responsible for and coal gas supervisor in one connect, and each hot-blast stove exchanges heat by described second Unit and the air be responsible for and coal gas supervisor in another connect, the air supervisor and auxiliary combustion equipment company Logical, the auxiliary combustion equipment is passed through combustion air in being responsible for the air.
2. the hot blast stove system of blast furnace according to claim 1, it is characterised in that second heat exchange unit is provided with more Individual, multiple second heat exchange units are corresponded with multiple hot-blast stoves and set, and each hot-blast stove passes through correspondingly respectively Second heat exchange unit connected with the chimney, and each hot-blast stove passes through corresponding second heat exchange unit respectively Connected with another in air supervisor and coal gas supervisor.
3. the hot blast stove system of blast furnace according to claim 1, it is characterised in that second heat exchange unit is provided with one Individual, each hot-blast stove is connected by second heat exchange unit with the chimney, and each hot-blast stove is by described Second heat exchange unit and the air be responsible for and coal gas supervisor in another connect.
4. the hot blast stove system of the blast furnace according to any one of claims 1 to 3, it is characterised in that first heat exchange is single Member is air heat-exchange unit, and second heat exchange unit is coal gas heat exchange unit, and each hot-blast stove passes through corresponding institute respectively State the first heat exchange unit to connect with air supervisor, and each hot-blast stove passes through second heat exchange unit and the coal Gas supervisor's connection.
5. the hot blast stove system of the blast furnace according to any one of claims 1 to 3, it is characterised in that first heat exchange is single Member is coal gas heat exchange unit, and second heat exchange unit is air heat-exchange unit, and each hot-blast stove passes through corresponding institute respectively State the first heat exchange unit to connect with coal gas supervisor, and each hot-blast stove passes through second heat exchange unit and the sky Gas supervisor's connection.
6. the hot blast stove system of the blast furnace according to any one of claims 1 to 3, it is characterised in that first heat exchange is single Member includes First Heat Exchanger, the first branch pipe and the first fume pipe, and first branch pipe is with first fume pipe through described First Heat Exchanger, and first branch pipe be arranged in parallel with first fume pipe,
One end of first branch pipe connects with the corresponding hot-blast stove, the other end of first branch pipe and the coal gas master Pipe or air supervisor's connection, first branch pipe between the hot-blast stove and the First Heat Exchanger are provided with the One outflow valve, positioned at the coal gas supervisor the First Heat Exchanger between or the air supervisor with the First Heat Exchanger it Between first branch pipe be provided with first flow into valve,
One end of first fume pipe connects with the corresponding hot-blast stove, the other end and the cigarette of first fume pipe Gas supervisor's connection, first fume pipe between the hot-blast stove and the First Heat Exchanger are provided with the first flue gas stream Enter valve, first fume pipe between flue gas supervisor and the First Heat Exchanger flows out provided with the first flue gas Valve.
7. the hot blast stove system of blast furnace according to claim 6, it is characterised in that first heat exchange unit also includes the Bypass line and the first flue gas bypass pipe, one end of first bypass pipe is between the described first outflow valve and the hot-blast stove Connected with first branch pipe, the other end of first bypass pipe in the coal gas be responsible for flowed into described first between valve or Connected between the air supervisor and the described first inflow valve with first branch pipe, first bypass pipe is provided with by the of first Port valve;One end of the first flue gas bypass pipe in first flue gas flow between valve and the hot-blast stove with first cigarette Tracheae is connected, and the other end of the first flue gas bypass pipe is responsible between first flue gas outflow valve and institute in the flue gas The connection of the first fume pipe is stated, the first flue gas bypass pipe is provided with the first flue gas by-passing valve;
On first branch pipe between the junction and the hot-blast stove of first branch pipe and first bypass pipe Provided with the first regulating valve, first branch pipe between first regulating valve and the hot-blast stove is provided with the first burning Valve;
First cigarette between first fume pipe and the first flue gas bypass pipe junction and the hot-blast stove Tracheae is provided with the first flue gas shut-off valve.
8. the hot blast stove system of blast furnace according to claim 1, it is characterised in that
Second heat exchange unit includes the second heat exchanger, the second branch pipe and the second fume pipe, second branch pipe and described the Two fume pipes run through second heat exchanger, and second branch pipe be arranged in parallel with second fume pipe,
One end of second branch pipe connects with the hot-blast stove, and the other end of second branch pipe is responsible for the coal gas or institute Air supervisor's connection is stated, second branch pipe between the hot-blast stove and second heat exchanger is provided with the second outflow Valve, the institute between coal gas supervisor and second heat exchanger or between air supervisor and second heat exchanger State the second branch pipe and flow into valve provided with second,
One end of second fume pipe is connected with the hot-blast stove, and the other end and the flue gas of second fume pipe are responsible for Connection, second fume pipe between the hot-blast stove and second heat exchanger are provided with the second flue gas and flow into valve, Second fume pipe between flue gas supervisor and second heat exchanger is provided with the second flue gas outflow valve.
9. the hot blast stove system of blast furnace according to claim 8, it is characterised in that second heat exchange unit also includes the Two bypass pipes and the second flue gas bypass pipe, one end of second bypass pipe is between the described second outflow valve and the hot-blast stove Connected with second branch pipe, the other end of second bypass pipe in the coal gas be responsible for flowed into described second between valve or Connected between the air supervisor and the described second inflow valve with second branch pipe, second bypass pipe is provided with by the of second Port valve;One end of the second flue gas bypass pipe in second flue gas flow between valve and the hot-blast stove with second cigarette Tracheae is connected, and the other end of the second flue gas bypass pipe is responsible between second flue gas outflow valve and institute in the flue gas The connection of the second fume pipe is stated, the second flue gas bypass pipe is provided with the second flue gas by-passing valve;
On second branch pipe between the junction and the hot-blast stove of second branch pipe and second bypass pipe Provided with the second regulating valve, second branch pipe between second regulating valve and the hot-blast stove is provided with the second burning Valve;
Second cigarette between second fume pipe and the second flue gas bypass pipe junction and the hot-blast stove Tracheae is provided with the second flue gas shut-off valve.
10. the hot blast stove system of the blast furnace according to any one of claims 1 to 3, it is characterised in that the auxiliary combustion equipment bag The first combustion fan and the second combustion fan are included, first combustion fan is connected by the first air hose and air supervisor Logical, second combustion fan is connected by the second air hose with air supervisor, and first air hose is provided with first Valve, second air hose are provided with the second valve.
CN201720944926.5U 2017-07-31 2017-07-31 A kind of hot blast stove system of blast furnace Active CN207002775U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107227382A (en) * 2017-07-31 2017-10-03 中冶京诚工程技术有限公司 A kind of hot blast stove system of blast furnace
CN114410870A (en) * 2022-01-24 2022-04-29 中天钢铁集团(南通)有限公司 Smoke control and exhaust system and method for coke oven gas burning of hot blast stove

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107227382A (en) * 2017-07-31 2017-10-03 中冶京诚工程技术有限公司 A kind of hot blast stove system of blast furnace
CN114410870A (en) * 2022-01-24 2022-04-29 中天钢铁集团(南通)有限公司 Smoke control and exhaust system and method for coke oven gas burning of hot blast stove
CN114410870B (en) * 2022-01-24 2023-03-14 中天钢铁集团(南通)有限公司 Smoke control and exhaust system and method for coke oven gas burning of hot blast stove

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