CN110117686B - Preheating system of plate heat exchanger of hot blast stove - Google Patents
Preheating system of plate heat exchanger of hot blast stove Download PDFInfo
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- CN110117686B CN110117686B CN201810122763.1A CN201810122763A CN110117686B CN 110117686 B CN110117686 B CN 110117686B CN 201810122763 A CN201810122763 A CN 201810122763A CN 110117686 B CN110117686 B CN 110117686B
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/14—Preheating the combustion air
Abstract
The invention discloses a preheating system of a plate heat exchanger of a hot blast stove, which comprises a first plate type gas preheater, a first plate type air preheater, a second plate type gas preheater, a second plate type air preheater, the hot blast stove, an additional combustion furnace, an air input pipeline and a gas input pipeline, wherein the smoke exhaust end of the hot blast stove is connected with a smoke pipeline which is respectively connected with the smoke input ends of the first plate type gas preheater and the first plate type air preheater which are connected in parallel, the smoke output end of the smoke gas preheater is connected with the smoke gas input ends of a second plate type gas preheater and a second plate type air preheater which are connected in parallel through a first outlet valve, a gas input pipeline is connected with the input end of a first plate type gas preheater, the first plate type gas preheater is connected with the second plate type gas preheater in series, an air input pipeline is connected with the input end of the first plate type air preheater, and the first plate type air preheater is connected with the second plate type air preheater in series; the preheating system of the invention ensures at least one preheating of coal gas and combustion air.
Description
Technical Field
The invention relates to the technical field of blast furnace ironmaking in the metallurgical industry, in particular to a preheating system of a plate heat exchanger of a hot blast stove.
Background
An effective method for saving energy and reducing consumption of the blast furnace ironmaking process is to increase the blast furnace inlet air temperature, wherein the blast furnace inlet air temperature can be increased by 20kg per ton of iron-coke ratio and the yield can be increased by 4% every 100 ℃, and the coal injection quantity can be increased by 50 kg. Therefore, all enterprises pay great attention to keeping the air temperature at a higher level for smelting operation. In the prior art, a hot blast stove is usually adopted, which is a device for providing hot air to a blast furnace, and the working principle of the hot blast stove is that gas is combusted through a burner to generate high-temperature flue gas, the high-temperature flue gas exchanges heat with a heat accumulator in the hot blast stove, and the high-temperature flue gas is changed into waste gas and is discharged from a flue. Then the cold air passes through the heat accumulator and exchanges heat with the heat accumulator to become hot air and high-temperature air. The waste gas of the hot blast stove contains a large amount of heat, and in order to save energy and improve the temperature of hot blast, various heat exchangers are generally adopted to recover the waste heat of the waste gas of the hot blast stove and preheat coal gas and/or combustion air.
However, the existing preheating system still has the following problems: the coal gas and the combustion air entering the hot blast stove are not effectively preheated, so that the hot blast stove needs to prolong the heating time to meet the requirement that the flue gas output from the hot blast stove reaches the temperature, and the service efficiency of the hot blast stove is lower.
Disclosure of Invention
The invention aims to solve the problem that the use efficiency of a hot blast stove is low because coal gas and combustion air are not effectively preheated in the existing preheating system, and provides a preheating system of a plate heat exchanger of the hot blast stove.
In order to achieve the purpose, the invention adopts the following technical scheme: a preheating system of a plate-type heat exchanger of a hot blast stove comprises a first plate-type gas preheater, a first plate-type air preheater, a second plate-type gas preheater, a second plate-type air preheater, the hot blast stove, a flue gas pipeline, an additional combustion furnace, an air input pipeline, an air output pipeline, a gas input pipeline and a gas output pipeline, wherein the flue gas pipeline is connected with the exhaust gas end of the hot blast stove, the flue gas pipeline is respectively connected with the flue gas input ends of the first plate-type gas preheater and the first plate-type air preheater which are connected in parallel, the flue gas output ends of the first plate-type gas preheater and the first plate-type air preheater are connected with the flue gas input ends of the second plate-type gas preheater and the second plate-type air preheater which are connected in parallel through a first outlet valve, the flue gas output ends of the second plate-type gas preheater and the second plate-type air preheater are connected with a chimney, and the flue gas output ends of the first plate-type gas preheater and the first plate-type air preheater are also connected with the chimney through a fourth outlet valve The output ends are connected, the flue gas output ends of the first plate type gas preheater and the first plate type air preheater are also provided with temperature sensors, the gas input pipeline is connected with the input end of the first plate type gas preheater through a first inlet valve, the output end of the first plate type gas preheater is connected with the input end of the second plate type gas preheater in series, the output end of the second plate type gas preheater is connected to the gas output pipeline through a second outlet valve, the air input pipeline is connected with the input end of the first plate-type air preheater through a second inlet valve, the output end of the first plate-type air preheater is connected with the input end of the second plate-type air preheater in series, the output end of the second plate-type air preheater is connected to the air output pipeline through a third outlet valve, and the output pipeline of the additional combustion furnace is connected in series with the smoke input ends of a second plate type gas preheater and a second plate type air preheater which are connected in parallel through a third inlet valve.
The temperature of the discharged flue gas is sensed by temperature sensors arranged at the flue gas output ends of the first plate-type gas preheater and the first plate-type air preheater, when the temperature of the discharged flue gas is too low, the first plate-type gas preheater and the first plate-type air preheater do not effectively preheat gas and air, at the moment, the first outlet valve is closed, the third inlet valve and the fourth outlet valve are opened, the additional combustion furnace fully preheats the gas flowing into the second plate-type gas preheater and the second plate-type air preheater to reach the temperature required by entering the hot blast stove, and the flue gas discharged by the first plate-type gas preheater and the first plate-type air preheater directly enters a chimney; when the temperature sensor senses that the temperature of the discharged flue gas is high, the first plate type gas preheater and the first plate type air preheater are indicated to achieve the preheating effect on the gas and the air, the third inlet valve is closed at the moment, the first outlet valve is selectively opened and the fourth outlet valve is selectively closed according to the temperature, the waste heat is continuously recovered, or the first outlet valve is closed and the fourth outlet valve is opened, and the flue gas subjected to primary heat exchange is directly discharged; when the temperature sensor senses that the temperature of the discharged flue gas is too high, the waste heat of the waste gas needs to be continuously recovered, the third inlet valve is closed, the first outlet valve is opened, the fourth outlet valve is closed, and the flue gas discharged by the first plate-type gas preheater and the first plate-type air preheater continuously flows into the second plate-type gas preheater and the second plate-type air preheater, so that the waste heat of the waste gas is fully absorbed, and the heat utilization rate is improved.
By adopting the scheme, the coal gas and the combustion-supporting air are ensured to be preheated at least once, and the preheated coal gas and the preheated combustion-supporting air can quickly reach the temperature requirement in the hot blast furnace and are used for the blast furnace ironmaking process.
The first plate type air preheater and the second plate type air preheater are identical in structure.
Preferably, the first plate air preheater comprises a heat exchange plate group, the heat exchange plate group is formed by stacking a plurality of heat exchange plates in the same direction, the heat exchange plates comprise heat exchange plate bodies, the heat exchange plate bodies are square, convex edges are respectively arranged on the upper ends of the heat exchange plate bodies along the periphery, the length of each convex edge is smaller than the side length of each heat exchange plate body, cylinders are arranged on the left side and the right side of the lower ends of the heat exchange plate bodies, grooves matched with the convex edges are formed in the end portions of the cylinders, the length of each cylinder is equal to the side length of each heat exchange plate body, the height of each cylinder is larger than the height of each convex edge, fin groups are respectively arranged on the upper surface and the lower surface of each heat exchange plate, each fin group is formed by alternately arranging linear fins and baffling fins, the adjacent heat exchange plates are staggered by 90 degrees to form orthogonal flow channels, and a first fixing plate is arranged at the top end of each heat exchange plate group, the bottom is provided with the second fixed plate, first fixed plate, second fixed plate pass through the fastener and connect.
The primary limiting effect is realized by the matched connection between the convex edges and the grooves of every two heat exchange plates, a flow channel for flue gas or air circulation is formed between every two heat exchange plates, the adjacent flow channels are arranged in an orthogonal mode, the top end of the heat exchange plate group is provided with a first fixing plate, the bottom end of the heat exchange plate group is provided with a second fixing plate, and the first fixing plate and the second fixing plate are fixedly connected with each other, so that the heat exchange plates which are arranged in a layer-by-layer folding mode form a whole, and the complexity caused by the bolt connection mode of every two preheating plates is avoided; the front surface and the back surface of the heat exchange plate are respectively provided with a fin group, and the fin groups accelerate heat transfer and improve the heat exchange performance between the flue gas and the air.
Wherein, the heat exchange plate is made of stainless steel.
The baffling type fin comprises a flow guide part and a baffling part, and an included angle between the flow guide part and the baffling part is 10-90 degrees.
When the airflow enters the baffling part from the flow guide part, the flowing direction of the airflow changes, the plurality of linear fins and the plurality of baffling fins are alternately used, so that the parallel flow and the reverse flow of the airflow are alternately generated, the smaller the included angle between the flow guide part and the baffling part is, the higher the frequency of the parallel flow and the reverse flow is, and the better the heat exchange effect is; however, the smaller the included angle between the flow guiding part and the flow baffling part is, the larger the flow resistance of the air flow is, the slower the flow rate is, and the heat exchange speed is influenced.
Preferably, the angle between the flow guide and the deflection is 10-25 °.
When the included angle between the flow guide part and the flow baffling part is 10-25 degrees, the heat exchange effect and the heat exchange speed between the flue gas and the air can meet the industrial application requirements.
The first fixing plate and the second fixing plate are made of high-temperature-resistant materials.
The first plate type gas preheater and the second plate type gas preheater have the same structure.
Wherein the first plate gas preheater is a corrugated plate heat transfer element.
Compared with the prior art, the invention has the following beneficial effects: the preheating system of the plate heat exchanger of the hot blast stove ensures at least one preheating of the coal gas and the combustion-supporting air, and the preheated coal gas and the preheated combustion-supporting air can quickly reach the temperature requirement in the hot blast stove and are used for the blast furnace ironmaking process; the preheating system of the plate type heat exchanger of the hot blast stove adopts the plate type air preheater with a specific structure, the heat exchange speed of the flue gas and the air is improved, the obtained high-temperature air enters the hot blast stove, and the combustion of the coal gas in the hot blast stove is accelerated.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a working schematic diagram of a preheating system of a plate heat exchanger of a hot blast stove according to the present invention;
FIG. 2 is a schematic structural diagram of a first plate type air preheater or a second plate type air preheater in the preheating system of the plate type heat exchanger of the hot blast stove;
FIG. 3 is a schematic structural diagram of a heat exchange plate in a preheating system of a plate heat exchanger of the hot blast stove;
FIG. 4 is a schematic view of the structure of FIG. 3 when inverted;
FIG. 5 is a schematic structural diagram of a preheating system of a plate heat exchanger of a hot blast stove, in which two heat exchange plates are stacked;
FIG. 6 is a schematic structural diagram of a preheating system of a plate heat exchanger of a hot blast stove, in which three heat exchange plates are stacked;
FIG. 7 is a schematic structural diagram of a baffle fin in a preheating system of a plate heat exchanger of a hot blast stove.
Wherein: the heat exchange plate group 1, the heat exchange plate 2, the heat exchange plate body 3, the cylinder 4, the ribs 5, the grooves 6, the flow channels 7, the first fixing plate 8, the second fixing plate 9, the fasteners 10, the fin groups 11, the deflection type fins 12, the flow guide parts 13, the deflection parts 14, the first plate type gas preheater 15, the first plate type air preheater 16, the second plate type gas preheater 17, the second plate type air preheater 18, the hot blast stove 19, the flue gas pipeline 20, the additional combustion furnace 21, the air input pipeline 22, the air output pipeline 23, the gas input pipeline 24, the gas output pipeline 25, the first outlet valve 26, the chimney 27, the fourth outlet valve 28, the temperature sensor 29 and the third inlet valve 30.
Detailed Description
Referring to fig. 1, a preheating system of a plate heat exchanger of a hot blast stove comprises a first plate gas preheater 15, a first plate air preheater 16, a second plate gas preheater 17, a second plate air preheater 18, a hot blast stove 19, a flue gas pipeline 20, an additional combustion furnace 21, an air input pipeline 22, an air output pipeline 23, a gas input pipeline 24, a gas output pipeline 25, a smoke exhaust end of the hot blast stove 19 is connected with the flue gas pipeline 20, the flue gas pipeline 20 is respectively connected with the smoke gas input ends of the first plate gas preheater 15 and the first plate air preheater 16 which are connected in parallel, the smoke gas output ends of the first plate gas preheater 15 and the first plate air preheater 16 are connected with the smoke gas input ends of the second plate gas preheater 17 and the second plate air preheater 18 which are connected in parallel through a first outlet valve 26, the smoke gas output ends of the second plate gas preheater 17 and the second plate air preheater 18 are connected with a chimney 27, the chimney 27 is also connected with the flue gas output ends of the first plate-type gas preheater 15 and the first plate-type air preheater 16 through a fourth outlet valve 28, the flue gas output ends of the first plate-type gas preheater 15 and the first plate-type air preheater 16 are also provided with a temperature sensor 29, a gas input pipeline 24 is connected with the input end of the first plate-type gas preheater 15 through a first inlet valve, the output end of the first plate-type gas preheater 15 is connected with the input end of the second plate-type gas preheater 17 in series, the output end of the second plate-type gas preheater 17 is connected to a gas output pipeline 25 through a second outlet valve, an air input pipeline 22 is connected with the input end of the first plate-type air preheater 16 through a second inlet valve, the output end of the first plate-type air preheater 16 is connected with the input end of the second plate-type air preheater 18 in series, and the output end of the second plate-type air preheater 18 is connected to an air output pipeline 23 through a third outlet valve, the output pipeline of the additional combustion furnace 21 is connected in series with the flue gas input ends of the second plate-type gas preheater 17 and the second plate-type air preheater 18 which are connected in parallel through a third inlet valve 30.
The exhaust gas from the hot blast stove 19 enters the first plate gas preheater 15 and the first plate air preheater 16 through the flue gas pipeline 20, for primary preheating of the gas and air inlet, temperature sensors 29 at the flue gas output of the first plate gas preheater 15 and the first plate air preheater 16 are used to monitor the temperature of the flue gas exiting the first plate gas preheater 15 and the first plate air preheater 16, when the temperature is too low, the first plate type gas preheater 15 and the first plate type air preheater 16 do not effectively preheat the gas and the air, at this time, the first outlet valve 26 is closed, the third inlet valve 30 and the fourth outlet valve 28 are opened, the additional combustion furnace 21 fully preheats the gas and the air which flow into the second plate type gas preheater 17 and the second plate type air preheater 18 to reach the temperature required by the hot blast stove 19, and the flue gas discharged by the first plate type gas preheater 15 and the first plate type air preheater 16 directly enters the chimney 27; when the temperature sensor 29 senses that the temperature of the discharged flue gas is high, it indicates that the first plate gas preheater 15 and the first plate air preheater 16 achieve the preheating effect on the gas and the air, at this time, the third inlet valve 30 is closed, the first outlet valve 26 is selectively opened and the fourth outlet valve 28 is closed according to the temperature, the preheating is continuously recovered, or the first outlet valve 26 is closed and the fourth outlet valve 28 is opened, and the flue gas after primary heat exchange is directly discharged; when the temperature sensor 29 senses that the temperature of the discharged flue gas is too high, the waste heat of the waste gas needs to be continuously recovered, the third inlet valve 30 is closed, the first outlet valve 26 is opened, the fourth outlet valve 28 is closed, and the flue gas discharged by the first plate-type gas preheater 15 and the first plate-type air preheater 16 continuously flows into the second plate-type gas preheater 17 and the second plate-type air preheater 18, so that the sufficient absorption of the waste heat of the waste gas is ensured, and the utilization rate of heat is improved.
Wherein the first plate gas preheater 15 and the second plate gas preheater 17 have the same structure.
The first plate air preheater 16 and the second plate air preheater 18 have the same structure.
As shown in fig. 2, the first plate air preheater 16 includes a heat exchange plate group 1, the heat exchange plate group 1 is formed by stacking a plurality of heat exchange plates 2 in the same direction, a first fixing plate 8 is disposed at the top end of the heat exchange plate group 1, a second fixing plate 9 is disposed at the bottom end of the heat exchange plate group 1, and the first fixing plate 8 and the second fixing plate 9 are connected through a fastener 10.
As shown in fig. 3, 4, 5, 6, the heat exchange plate 2 includes a heat exchange plate body 3, the heat exchange plate body 3 is square, the upper end of the heat exchange plate body 3 is provided with a rib 5 along the periphery all around respectively, the length of the rib 5 is smaller than the side length of the heat exchange plate body 3, the left side and the right side of the lower end of the heat exchange plate body 3 are provided with columns 4, the end parts of the columns 4 are provided with grooves 6 used in cooperation with the rib 5, the length of the columns 4 is equal to the side length of the heat exchange plate body 3, and the height of the columns 4 is larger than the height of the rib 5. The upper surface and the lower surface of the heat exchange plate 2 are respectively provided with a fin group 11, the fin group 11 is formed by alternately arranging linear fins and baffling fins 12, and the adjacent heat exchange plates 2 are staggered by 90 degrees to form orthogonal flow channels 7.
As shown in fig. 7, the deflecting fin 12 includes a flow guide portion 13 and a deflecting portion 14, and an angle between the flow guide portion 13 and the deflecting portion 14 is 10 to 90 °, preferably 10 to 25 °.
When the heat exchange plate is used, two adjacent heat exchange plates 2 are connected with the convex edge 5 in a matched mode through the groove 6, the preliminary limiting fixing effect of the adjacent heat exchange plates 2 is achieved, further, the first fixing plate 8 is arranged at the top end of the heat exchange plate set 1, the second fixing plate 9 is arranged at the bottom end of the heat exchange plate set 1, the first fixing plate 8 and the second fixing plate 9 are connected through the fastening piece 10, the limiting fixing effect of the whole heat exchange plate set 1 is achieved, and the adjacent heat exchange plates 2 are connected more simply through the mode; the flue gas and the air are respectively introduced into the flow channel 7 which is orthogonally arranged, the flue gas and the air exchange heat, so that the temperature of the flue gas is reduced, the temperature of the air is increased, the fin groups 11 arranged on the upper surface and the lower surface of the heat exchange plate 2 enable the heat exchange effect of the flue gas and the air to be good, and the heat exchange speed is high.
Wherein, the heat exchange plate 2 is made of stainless steel.
The first fixing plate 8 and the second fixing plate 9 are made of high temperature resistant material.
The preheating system of the plate heat exchanger of the hot blast stove ensures that the coal gas and the combustion-supporting air are preheated at least once, and the preheated coal gas and the preheated combustion-supporting air can quickly reach the temperature requirement in the hot blast stove and are used for the blast furnace ironmaking process.
The foregoing detailed description is given by way of example only, to better enable one of ordinary skill in the art to understand the patent, and is not to be construed as limiting the scope of what is encompassed by the patent; any equivalent alterations or modifications made according to the spirit of the disclosure of this patent are intended to be included in the scope of this patent.
Claims (8)
1. A preheating system of a plate heat exchanger of a hot blast stove is characterized by comprising a first plate type gas preheater (15), a first plate type air preheater (16), a second plate type gas preheater (17), a second plate type air preheater (18), the hot blast stove (19), a flue gas pipeline (20), an additional combustion furnace (21), an air input pipeline (22), an air output pipeline (23), a gas input pipeline (24) and a gas output pipeline (25),
the flue gas inlet end of the exhaust gas end of the hot blast stove (19) is connected with a flue gas pipeline (20), the flue gas pipeline (20) is respectively connected with the flue gas inlet ends of a first plate-type gas preheater (15) and a first plate-type air preheater (16) which are connected in parallel, the flue gas outlet ends of the first plate-type gas preheater (15) and the first plate-type air preheater (16) are connected with the flue gas inlet ends of a second plate-type gas preheater (17) and a second plate-type air preheater (18) which are connected in parallel through a first outlet valve (26), the flue gas outlet ends of the second plate-type gas preheater (17) and the second plate-type air preheater (18) are connected with a chimney (27), the chimney (27) is further connected with the flue gas outlet ends of the first plate-type gas preheater (15) and the first plate-type air preheater (16) through a fourth outlet valve (28), and the flue gas outlet ends of the first plate-type gas preheater (15) and the first plate-type air preheater (16) are further provided with temperature inductors (20) 29),
the gas input pipeline (24) is connected with the input end of the first plate-type gas preheater (15) through a first inlet valve, the output end of the first plate-type gas preheater (15) is connected with the input end of the second plate-type gas preheater (17) in series, the output end of the second plate-type gas preheater (17) is connected to the gas output pipeline (25) through a second outlet valve,
the air input pipeline (22) is connected with the input end of the first plate-type air preheater (16) through a second inlet valve, the output end of the first plate-type air preheater (16) is connected with the input end of the second plate-type air preheater (18) in series, the output end of the second plate-type air preheater (18) is connected to the air output pipeline (23) through a third outlet valve,
the output pipeline of the additional combustion furnace (21) is connected in series with the smoke input ends of a second plate type gas preheater (17) and a second plate type air preheater (18) which are connected in parallel through a third inlet valve (30);
the first plate type air preheater (16) comprises a heat exchange plate set (1), wherein the heat exchange plate set (1) is formed by stacking a plurality of heat exchange plate sheets (2) in the same direction, the heat exchange plate sheets (2) comprise heat exchange plate bodies (3), the heat exchange plate bodies (3) are square, convex edges (5) are respectively arranged at the upper ends of the heat exchange plate bodies (3) along the periphery of the periphery, the length of each convex edge (5) is smaller than the side length of each heat exchange plate body (3), cylinders (4) are arranged on the left side and the right side of the lower end of each heat exchange plate body (3), grooves (6) matched with the convex edges (5) for use are formed in the end portions of the cylinders (4), the length of each cylinder (4) is equal to the side length of each heat exchange plate body (3), the height of each cylinder (4) is larger than the height of the corresponding convex edges (5), and fin, the fin group (11) is formed by alternately arranging linear fins and baffling fins (12), adjacent heat exchange plates (2) are staggered by 90 degrees to form orthogonal flow channels (7), a first fixing plate (8) is arranged at the top end of the heat exchange plate group (1), a second fixing plate (9) is arranged at the bottom end of the heat exchange plate group, and the first fixing plate (8) and the second fixing plate (9) are connected through a fastener (10);
waste gas discharged by a hot blast stove (19) respectively enters a first plate type gas preheater (15) and a first plate type air preheater (16) through a flue gas pipeline (20) to preheat gas and air for the first time, temperature sensors (29) positioned at the flue gas output ends of the first plate type gas preheater (15) and the first plate type air preheater (16) are used for monitoring the temperature of the flue gas discharged from the first plate type gas preheater (15) and the first plate type air preheater (16), when the temperature is too low, the first plate type gas preheater (15) and the first plate type air preheater (16) do not effectively preheat the gas and the air, at the moment, a first outlet valve (26) is closed, a third inlet valve (30) and a fourth outlet valve (28) are opened, an additional combustion furnace (21) fully preheats the gas flowing into a second plate type gas preheater (17) and a second plate type air preheater (18), reaching the temperature required by entering the hot blast stove (19).
2. The preheating system of a plate heat exchanger of a hot blast stove according to claim 1, wherein the first plate air preheater (16) and the second plate air preheater (18) are of identical construction.
3. The preheating system of a plate heat exchanger of a hot blast stove according to claim 2, wherein the heat exchanger plates (2) are of stainless steel material.
4. The preheating system of a plate heat exchanger of a hot blast stove according to claim 3, characterized in that the deflection fin (12) comprises a flow guide (13) and a deflection (14), the angle between the flow guide (13) and the deflection (14) being 10-90 °.
5. A preheating system for a plate heat exchanger of a hot blast stove according to claim 4, wherein the angle between the flow guide (13) and the baffle (14) is 10-25 °.
6. The preheating system of a plate heat exchanger of a hot blast stove according to claim 1, wherein the first fixing plate (8) and the second fixing plate (9) are made of a high temperature resistant material.
7. The preheating system of a plate heat exchanger of a hot blast stove according to claim 1, wherein the first plate gas preheater (15) and the second plate gas preheater (17) are of identical construction.
8. The preheating system of a plate heat exchanger of a hot blast stove according to claim 1, wherein the first plate gas preheater (15) is a corrugated plate heat transfer element.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810122763.1A CN110117686B (en) | 2018-02-07 | 2018-02-07 | Preheating system of plate heat exchanger of hot blast stove |
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| CN201810122763.1A CN110117686B (en) | 2018-02-07 | 2018-02-07 | Preheating system of plate heat exchanger of hot blast stove |
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| CN110117686B true CN110117686B (en) | 2021-08-06 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353125A (en) * | 2013-07-23 | 2013-10-16 | 茂名重力石化机械制造有限公司 | Baffling fin casting plate-type air pre-heater |
| CN107488771A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of blast-furnace hot-air furnace system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103353125A (en) * | 2013-07-23 | 2013-10-16 | 茂名重力石化机械制造有限公司 | Baffling fin casting plate-type air pre-heater |
| CN107488771A (en) * | 2017-09-29 | 2017-12-19 | 四川德胜集团钒钛有限公司 | A kind of blast-furnace hot-air furnace system |
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