Blast dehumidifier structure of blast furnace

Abstract

The invention belongs to a blast dehumidifier structure of a blast furnace in the technical field of blast furnace ironmaking in the metallurgical industry. A V-shaped flow guide plate (2) is arranged inside the inlet side of the dehumidifier shell (1) and extends from the upper end of the dehumidifier shell (1) to the lower end of the dehumidifier shell (1), the V-shaped flow guide plate (2) comprises a plurality of V-shaped plate assemblies (3), each V-shaped plate assembly (3) is of a structure with an open hole (4), every two adjacent V-shaped plate assemblies (3) are of a V-shaped structure, an acute included angle is formed between each V-shaped plate assembly (3) and a horizontal line (5), and the V-shaped plate assemblies (3) and the horizontal line (5) are arranged in parallel. And the V-shaped guide plate (2) is close to a pre-cooling area (6) in the dehumidifier shell (1). The blast dehumidifier structure of the blast furnace is simple in structure, the dehumidification efficiency can be effectively improved, the service life of equipment is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of blast furnace ironmaking in the metallurgical industry. More specifically, it relates to a structure of a blast furnace blower dehumidifier. Background Art

[0002] In the technical field of blast furnace ironmaking in the metallurgical industry, there is a dehumidifier for the blast furnace blower system, and the gas dehumidification treatment technology is realized through the dehumidifier. The blast furnace blower dehumidification technology is a key process for reducing the humidity of the blast furnace blower, which can significantly reduce the coke ratio, increase the molten iron output and reduce carbon emissions. The traditional dehumidifier has the following problems: 1. Uneven air flow distribution: resulting in low local dehumidification efficiency, easy to form condensation or blockage; 2. Insufficient mass transfer and heat transfer efficiency: unreasonable layout of traditional fillers or cooling pipes, low moisture condensation efficiency; 3. Corrosion and scaling: high humidity and acidic environment lead to short equipment life and high maintenance cost; 4. Bulky volume: redundant structure, difficult to adapt to the compact blast furnace system. Therefore, there is an urgent need for a new dehumidifier structure to solve the above problems.

[0003] There is a technology with the name of "A Dehumidifier for Blast Furnace Blower" and the publication (announcement) number of "CN218786643U" in the prior art. This technology discloses a dehumidifier for blast furnace blower, which includes a housing and an air inlet pipe and an air outlet pipe arranged on both sides of the housing. A dehumidification mechanism is arranged inside the housing, filter plates are arranged on both sides of the dehumidification mechanism, and a collection mechanism is arranged at one side of the bottom ends of the two filter plates; slots are arranged on the inner wall of the housing, and both slots communicate with the front end of the housing. First gaskets are fixedly connected to the inner walls of the two slots. The outer sides of the two filter plates are respectively inserted into the two slots and contact with the first gaskets. A maintenance door is hinged to the front end of the housing. In the present invention, the particulate matter in the air flow is filtered and intercepted by the filter plates, and the intercepted particulate matter will fall into the collection box intensively. Later, the collection box can be taken out to process the particulate matter in it, which is more convenient. The filtered air flow continues to enter the dehumidification box through the through holes, and the moisture in the air flow is absorbed by two desiccant filler plates and a honeycomb-shaped absorbent cotton, and the dehumidification effect is better.

[0004] However, this technology does not involve the technical problems and technical solutions of the present application. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: aiming at the deficiencies of the prior art, to provide a blast furnace blower dehumidifier structure with a simple structure, which can effectively improve the dehumidification efficiency, extend the equipment life and reduce the maintenance cost.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0007] The present invention relates to a structure of a blast furnace air dehumidifier. Inside the inlet side of the dehumidifier housing, a V-shaped deflector plate is provided. The V-shaped deflector plate extends from the upper end to the lower end of the dehumidifier housing. The V-shaped deflector plate comprises a plurality of V-shaped plate assemblies. The V-shaped plate assemblies are structures with openings. Adjacent V-shaped plate assemblies form a V-shaped structure. Each V-shaped plate assembly forms an acute angle with the horizontal line. The V-shaped deflector plate is close to the precooling zone inside the dehumidifier housing.

[0008] A deep condensation zone and a drying enhancement zone are also provided inside the dehumidifier housing.

[0009] The dehumidifier housing further includes an outlet side. Inside the dehumidifier housing, the inlet side, the V-shaped deflector plate, the precooling zone, the deep condensation zone, the drying enhancement zone, and the outlet side are arranged in sequence from the inlet side to the outlet side.

[0010] A gap portion is provided between the inlet side and the V-shaped deflector plate, a gap portion is provided between the V-shaped deflector plate and the precooling zone, a gap portion is provided between the precooling zone and the deep condensation zone, a gap portion is provided between the deep condensation zone and the drying enhancement zone, and a gap portion is provided between the drying enhancement zone and the outlet side.

[0011] The precooling zone adopts a corrugated plate heat exchanger; the deep condensation zone is arranged with spiral wound cooling tubes; the drying enhancement zone is provided with a honeycomb ceramic adsorption layer.

[0012] The surface of the spiral wound cooling tubes in the deep condensation zone is coated with a polytetrafluoroethylene PTFE composite coating; the surface of the V-shaped deflector plate is coated with a polytetrafluoroethylene PTFE composite coating.

[0013] An inclined water collecting trough is provided at the bottom of the deep condensation zone.

[0014] Circulating water at 12°C - 17°C is passed through the corrugated plate heat exchanger in the precooling zone, and low-temperature water at 5°C - 8°C is passed through the spiral cooling tubes in the deep condensation zone.

[0015] A hot air blower is provided in the gap between the drying enhancement zone and the outlet side.

[0016] A conical air collecting hood is provided outside the outlet side of the dehumidifier housing. The large mouth section of the conical air collecting hood is connected to the humidifier housing.

[0017] Adopting the technical solution of the present invention, the working principle and beneficial effects are as follows:

[0018] The structure of the blast furnace blower dehumidifier described in the present invention, when setting the structure, adopts an optimized air flow guiding structure: a guide plate is arranged inside the inlet side of the dehumidifier housing. The guide plate is a V-shaped guide plate, and the V-shaped guide plate includes a plurality of V-shaped plate components. Each V-shaped plate component is respectively set to have a structure with openings for air intake. The guiding directions of the gases entering from this V-shaped plate component by different V-shaped plate components are different, forming a porous and multi-directional guide plate. The external air flow is guided to pass through the guide plate from different positions through the distribution of the openings, realizing uniform diffusion of the air flow; and the plurality of V-shaped plate components are arranged at different angles, and the joint parts of adjacent V-shaped plate components are connected to form an integral V-shaped guide plate. When the air flow enters, it is forced to change direction by different V-shaped plate components to extend the residence time and achieve uniform diffusion. At the same time, a layered multi-stage dehumidification module is adopted: it is divided into three dehumidification zones, a precooling zone, a deep condensation zone and a drying strengthening zone, and heat transfer units with different structures are adopted in each zone. A corrugated plate heat exchanger is adopted in the precooling zone to quickly reduce the air temperature below the dew point; spiral wound cooling tubes are arranged in the deep condensation zone to increase the contact area and form an eddy current effect; a honeycomb ceramic adsorption layer is arranged in the drying strengthening zone to adsorb the residual moisture. Brief Description of the Drawings

[0019] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0020] Figure 1 It is a schematic structural diagram of the blast furnace blower dehumidifier structure described in the present invention;

[0021] Figure 2 It is a schematic front internal structure diagram of the blast furnace blower dehumidifier structure described in the present invention;

[0022] Figure 3 It is a schematic top internal structure diagram of the blast furnace blower dehumidifier structure described in the present invention;

[0023] Figure 4 It is a schematic structural diagram of the V-shaped plate component of the blast furnace blower dehumidifier structure described in the present invention;

[0024] The marks in the drawings are respectively: 1, dehumidifier housing; 2, V-shaped guide plate; 3, V-shaped plate component; 4, opening; 5, horizontal line; 6, precooling zone; 7, deep condensation zone; 8, drying strengthening zone; 9, inclined water collecting tank; 10, hot air blower; 11, conical air collecting hood; 12, ultrasonic vibrator; 13, heat exchanger water pipe; 14, cooling tube heat exchange pipe. Detailed Description of the Invention

[0025] The following, with reference to the drawings, through the description of the embodiments, further details are given to the specific implementation manners of the present invention, such as the shapes, structures of the various components involved, the mutual positions and connection relationships between the various parts, the functions and working principles of the various parts, etc.:

[0026] As shown in the attached Figure 1 -attachment Figure 4 As shown, the present invention is a structure of a blast furnace blower dehumidifier. Inside the inlet side of the dehumidifier housing 1, a V-shaped deflector 2 is provided. The V-shaped deflector 2 extends from the upper end of the dehumidifier housing 1 to the lower end of the dehumidifier housing 1. The V-shaped deflector 2 includes a plurality of V-shaped plate assemblies 3. The V-shaped plate assemblies 3 are structures with openings 4. Adjacent V-shaped plate assemblies 3 are in a V-shaped structure. Each V-shaped plate assembly 3 forms an acute angle with the horizontal line 5. The V-shaped deflector 2 is close to the precooling zone 6 inside the dehumidifier housing 1. Inside the dehumidifier housing 1, a deep condensation zone 7 and a drying enhancement zone 8 are also provided. The dehumidifier housing 1 also includes an outlet side. Inside the dehumidifier housing 1, from the inlet side to the outlet side, the inlet side, the V-shaped deflector 2, the precooling zone 6, the deep condensation zone 7, the drying enhancement zone 8, and the outlet side are arranged in sequence. For the deficiencies in the prior art, the above structure proposes an improved technical solution. When setting the structure, an air flow guiding optimization structure is adopted: inside the inlet side of the dehumidifier housing 1, a deflector is provided, and the deflector is the V-shaped deflector 2. The V-shaped deflector 2 includes a plurality of V-shaped plate assemblies 3. Each V-shaped plate assembly 3 is respectively set as a structure with an opening 4. The opening 4 is used for air intake. Different V-shaped plate assemblies 3 have different guiding directions for the gas entering from this V-shaped plate assembly 3, forming a porous and multi-directional deflector. The external air flow is guided to pass through the deflector from different positions through the distribution of the openings 4, realizing uniform diffusion of the air flow; and a plurality of V-shaped plate assemblies 3 are arranged at different angles, and the combined parts of adjacent V-shaped plate assemblies 3 are connected to form an integral V-shaped deflector 2. Through different V-shaped plate assemblies 3, the air flow is forced to change direction when entering, so as to extend the residence time and realize uniform diffusion. At the same time, a layered and multi-stage dehumidification module is adopted: it is divided into three dehumidification zones, namely the precooling zone, the deep condensation zone, and the drying enhancement zone. Each zone adopts heat transfer units with different structures. The precooling zone adopts a corrugated plate heat exchanger to quickly reduce the air temperature below the dew point; the deep condensation zone is provided with spiral wound cooling tubes to increase the contact area and form an eddy current effect; the drying enhancement zone is provided with a honeycomb ceramic adsorption layer to adsorb the residual moisture. The structure of the blast furnace blower dehumidifier described in the present invention is simple, can effectively improve the dehumidification efficiency, extend the equipment life, and reduce the maintenance cost.

[0027] A gap part is provided between the inlet side and the V-shaped deflector 2, a gap part is provided between the V-shaped deflector 2 and the precooling zone 6, a gap part is provided between the precooling zone 6 and the deep condensation zone 7, a gap part is provided between the deep condensation zone 7 and the drying enhancement zone 8, and a gap part is provided between the drying enhancement zone 8 and the outlet side. For the above structure, the gap parts in different positions ensure that the gas passing through the corresponding components can stay and then pass through the subsequent components, effectively improving the gas treatment effect.

[0028] The pre-cooling zone 6 adopts a corrugated plate heat exchanger, and the corrugated plate heat exchanger is connected to the heat exchanger water pipe 13; the deep condensation zone 7 is provided with spiral wound cooling pipes, and the spiral wound cooling pipes are connected to the cooling pipe heat exchanger pipe 14; the drying and strengthening zone 8 is provided with a honeycomb ceramic adsorption layer. With the above structure, the pre-cooling zone adopts a corrugated plate heat exchanger, and cooling water is introduced to achieve temperature reduction, which can quickly reduce the air temperature below the dew point; the deep condensation zone is provided with spiral wound cooling pipes, and cooling water is introduced to achieve temperature reduction. The structure of the spiral wound cooling pipes effectively increases the contact area and forms an eddy current effect; the drying and strengthening zone is provided with a honeycomb ceramic adsorption layer to adsorb residual moisture.

[0029] The surface of the spiral wound cooling pipes in the deep condensation zone 7 is coated with a polytetrafluoroethylene PTFE composite coating; the surface of the V-shaped deflector 2 is coated with a polytetrafluoroethylene PTFE composite coating. With the above structure, a composite coating is formed by coating polytetrafluoroethylene (PTFE) to enhance corrosion resistance.

[0030] An inclined water collecting tank 9 is arranged at the bottom of the deep condensation zone 7. With the above structure, the inclined water collecting tank 9 is provided to collect the water underground. The inclined structure means that the bottom of the water collecting tank is inclined, which is convenient for water to flow out. And an ultrasonic vibration device is equipped to prevent impurity deposition.

[0031] The corrugated plate heat exchanger in the pre-cooling zone 6 is passed through with circulating water at 12°C - 17°C, and the spiral cooling pipes in the deep condensation zone 7 are passed through with low-temperature water at 5°C - 8°C. With the above structure, the corrugated plate heat exchanger in the pre-cooling zone 6 effectively exchanges heat with the gas through low temperature, and the spiral cooling pipes in the deep condensation zone 7 effectively exchange heat with the gas through lower-temperature low-temperature water, improving the dehumidification effect of the gas.

[0032] A hot air blower 10 is arranged in the gap between the drying and strengthening zone 8 and the outlet side. With the above structure, the honeycomb ceramic layer adsorbs the remaining moisture. After adsorption saturation, the hot air blower 10 is controlled to blow back to blow away the moisture in the honeycomb ceramic layer, realizing the regeneration of the adsorption function of the honeycomb ceramic layer.

[0033] A conical air collecting hood 11 is arranged outside the outlet side of the dehumidifier housing 1, and the large-mouth section of the conical air collecting hood 11 is connected to the humidifier housing 1. With the above structure, through the flared conical air collecting hood 11, the heat-exchanged and dried gas is centrally sent out to meet the subsequent use requirements.

[0034] The structure of the blast furnace blower dehumidifier described in the present invention has the following beneficial effects: 1. Pre-cooling zone: The blast air enters the pre-cooling zone evenly through the inlet guide plate. The corrugated plate heat exchanger is supplied with 15°C circulating water to cool the air to below 25°C. 2. Deep condensation zone: The spiral cooling pipe is supplied with 5°C low-temperature water to form a vortex effect to promote water condensation, and the condensed water is discharged through the inclined water collection tank. 3. Drying enhancement zone: The air after heat exchange is dried. 4. Anti-corrosion maintenance: Improve the product performance, and perform non-destructive testing on the PTFE coating every year. Three-stage gradient dehumidification: Combining sensible heat cooling and latent heat adsorption, the dehumidification efficiency is increased by more than 30%; the structural design of the guide plate: Optimize the gas flow direction through computational fluid dynamics (CFD), and combined with the hole distribution to eliminate the air flow dead angle; Self-cleaning water collection system: Combining ultrasonic vibration and inclined diversion to reduce the risk of blockage. The dehumidifier structure of the present invention is adapted to different blast furnace scales and has significant economic and environmental benefits.

[0035] The structure of the blast furnace blower dehumidifier described in the present invention adopts an optimized air flow guiding structure: A guide plate is arranged inside the inlet side of the dehumidifier housing 1. The guide plate is a V-shaped guide plate 2. The V-shaped guide plate 2 includes a plurality of V-shaped plate components 3. Each V-shaped plate component 3 is respectively arranged with a structure with openings 4 for air intake. The guiding directions of the gases entering from different V-shaped plate components 3 are different, forming a porous and multi-directional guide plate. The distribution of the openings 4 guides the external air flow to pass through the guide plate from different positions, realizing uniform diffusion of the air flow; and the plurality of V-shaped plate components 3 are arranged at different angles, and the combined parts of adjacent V-shaped plate components 3 are connected to form an integral V-shaped guide plate 2. Through different V-shaped plate components 3, the air flow is forced to change direction when entering, and the residence time is prolonged to achieve uniform diffusion. It adopts a layered multi-stage dehumidification module: It is divided into three dehumidification zones, namely the pre-cooling zone, the deep condensation zone and the drying enhancement zone, and each zone adopts heat transfer units with different structures. The pre-cooling zone adopts a corrugated plate heat exchanger to quickly reduce the air temperature below the dew point; the deep condensation zone is arranged with spiral wound cooling pipes to increase the contact area and form a vortex effect; the drying enhancement zone is provided with a honeycomb ceramic adsorption layer to adsorb the residual moisture.

[0036] The present invention has been described exemplarily above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A structure of a blast furnace air dehumidifier, characterized in that: Inside the inlet side of the dehumidifier housing (1), a V-shaped flow deflector (2) is provided. The V-shaped flow deflector (2) extends from the upper end to the lower end of the dehumidifier housing (1). The V-shaped flow deflector (2) includes a plurality of V-shaped plate assemblies (3). The V-shaped plate assemblies (3) are structures with openings (4). Adjacent V-shaped plate assemblies (3) form a V-shaped structure. Each V-shaped plate assembly (3) forms an acute angle with the horizontal line (5). The V-shaped flow deflector (2) is close to the precooling zone (6) inside the dehumidifier housing (1).

2. The structure of the blast furnace blower dehumidifier according to claim 1, characterized in that: A deep condensation zone (7) and a drying enhancement zone (8) are also provided inside the dehumidifier housing (1).

3. The structure of the blast furnace air dehumidifier according to claim 1 or 2, characterized in that: The dehumidifier housing (1) further includes an outlet side. Inside the dehumidifier housing (1), the inlet side, the V-shaped flow deflector (2), the precooling zone (6), the deep condensation zone (7), the drying enhancement zone (8), and the outlet side are arranged in sequence from the inlet side to the outlet side.

4. The structure of the blast furnace air dehumidifier according to claim 3, characterized in that: A gap is provided between the inlet side and the V-shaped flow deflector (2), a gap is provided between the V-shaped flow deflector (2) and the precooling zone (6), a gap is provided between the precooling zone (6) and the deep condensation zone (7), a gap is provided between the deep condensation zone (7) and the drying enhancement zone (8), and a gap is provided between the drying enhancement zone (8) and the outlet side.

5. The structure of the blast furnace blower dehumidifier according to claim 2, wherein: The precooling zone (6) uses a corrugated plate heat exchanger; the deep condensation zone (7) is arranged with spiral wound cooling tubes; the drying enhancement zone (8) is provided with a honeycomb ceramic adsorption layer.

6. The structure of the blast furnace blower dehumidifier according to claim 5, wherein: The surface of the spiral wound cooling tubes in the deep condensation zone (7) is coated with a polytetrafluoroethylene composite coating; the surface of the V-shaped flow deflector (2) is coated with a polytetrafluoroethylene composite coating.

7. The structure of the blast furnace blower dehumidifier according to claim 2, characterized in that: An inclined water collecting trough (9) is provided at the bottom of the deep condensation zone (7).

8. The structure of the blast furnace air dehumidifier according to claim 5, characterized in that: Circulating water at 12°C - 17°C is passed through the corrugated plate heat exchanger in the precooling zone (6), and low-temperature water at 5°C - 8°C is passed through the spiral cooling tubes in the deep condensation zone (7).

9. The structure of the blast furnace blower dehumidifier according to claim 3, wherein: A hot air blower (10) is provided in the gap between the drying enhancement zone (8) and the outlet side.

10. The structure of the blast furnace blower dehumidifier according to claim 1 or 2, characterized in that: A conical air collecting hood (11) is provided outside the outlet side of the dehumidifier housing (1). The large opening section of the conical air collecting hood (11) is connected to the humidifier housing (1).

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