Environment-friendly blast furnace tail gas treatment equipment

Abstract

The utility model relates to the technical field of blast furnace tail gas treatment, in particular to environment-friendly blast furnace tail gas treatment equipment which comprises a gas inlet bin, a cooling bin, a dust removal bin and a reaction tank, a gas inlet pipe is fixedly installed on the side face of the gas inlet bin, a channel is fixedly installed at the top of the gas inlet bin, and a heat exchange bin is fixedly installed at the top end of the channel. According to the tail gas treatment system, tail gas treatment is achieved through all functional modules which are efficiently connected in series and used for treating gas, waste heat in the tail gas is effectively recycled through the heat exchange pipes, the energy utilization efficiency of the system is improved, the influence of high-temperature gas on a subsequent treatment unit is reduced, and long-term stable operation of equipment is guaranteed; the removal rate of particulate matters in the tail gas is further improved through the cloth bag of the dust removal bin, airflow is slowed down through the design of the partition plate, the dust settling efficiency is improved, the smoothness of tail gas treatment is effectively guaranteed, the risk of gas leakage is reduced, and therefore the overall running stability of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace tail gas treatment, in particular to an environmentally friendly blast furnace tail gas treatment device. Background Art

[0002] During the blast furnace ironmaking process, the exhaust gas produced contains a large amount of dust, harmful gases and other pollutants. If these exhaust gases are directly discharged without effective treatment, they will cause serious pollution to the atmospheric environment. In particular, sulfur dioxide (SO2) and nitrogen oxides (NO x ) and suspended particulate matter are major sources of pollution that contribute to environmental problems such as acid rain and smog. Furthermore, with increasingly stringent environmental standards, particularly those for exhaust emissions in the steelmaking industry, traditional exhaust treatment equipment is no longer able to meet the demands of modern industrial environmental protection. Therefore, the development of efficient and environmentally friendly exhaust treatment equipment has become a pressing technical challenge for the industry.

[0003] Traditional blast furnace exhaust gas treatment equipment mainly focuses on physical dust removal or simple chemical reaction treatment. Although it can reduce dust and some harmful gases in the exhaust gas to a certain extent, it often has the following technical deficiencies: First, the equipment has poor durability in high-temperature environments. High-temperature exhaust gas can easily cause corrosion and damage to equipment components, resulting in high maintenance frequency and short service life of the equipment. Secondly, the dust removal efficiency and chemical reaction treatment efficiency of traditional equipment are low, making it difficult to fully remove various pollutants in the exhaust gas. Especially when dealing with high concentrations of harmful gases, the treatment effect is often substandard. In addition, exhaust gas with high humidity can easily affect the filtering effect of dust removal equipment, resulting in the inability to fully remove particulate matter in the exhaust gas. Thirdly, the energy efficiency of traditional exhaust gas treatment equipment is low, and it is impossible to effectively recover the waste heat in the exhaust gas, resulting in serious energy waste, which further increases the operating costs of the enterprise.

[0004] In response to these problems, an environmentally friendly blast furnace tail gas treatment equipment is proposed. Utility Model Content

[0005] The purpose of this utility model is to solve the technical problems raised in the above background technology.

[0006] The utility model adopts the following technical scheme: an environmentally friendly blast furnace tail gas treatment equipment, including an air intake bin, a cooling bin, a dust removal bin and a reaction tank, the side of the air intake bin is fixedly installed with an air intake pipe, the top of the air intake bin is fixedly installed with a channel, the top of the channel is fixedly installed with a heat exchange bin, the interior of the heat exchange bin is fixedly installed with a heat exchange tube, the outlet end of the heat exchange tube is fixedly installed with a recovery tube, the interior of the cooling bin is fixedly installed with an inner plate, a cavity is formed between the inner plate and the cooling bin, a condensation tube is fixedly installed inside the cavity, a partition is fixedly installed inside the dust removal bin, the bottom surface of the partition is fixedly installed with a connecting port, the surface of the connecting port is fixedly installed with a cloth bag, the top of the reaction tank is fixedly installed with a No. 2 motor, the output end of the No. 2 motor is fixedly installed with a rotating rod, the surface of the rotating rod is fixedly installed with a stirring blade, and the top of the reaction tank is fixedly installed with an exhaust pipe.

[0007] Preferably, the air intake bin and cooling bin are fixedly connected via a No. 1 connecting pipe, the cooling bin and dust removal bin are fixedly connected via a No. 2 connecting pipe, and the dust removal bin and reaction tank are fixedly connected via a No. 3 connecting pipe. This achieves efficient serial processing between the functional bins, making the gas processing process more coherent, reducing the risk of gas leakage, and facilitating maintenance and inspection of each module, improving the overall stability and reliability of the equipment.

[0008] Preferably, the No. 1 connecting pipe, the No. 2 connecting pipe, and the No. 3 connecting pipe are all made of high-temperature, corrosion-resistant materials. This not only increases the service life of the equipment in high-temperature, highly corrosive environments, but also reduces equipment failure rates, ensuring long-term, stable operation of the equipment during blast furnace tail gas treatment and reducing maintenance costs.

[0009] Preferably, the rotating rod is rotatably connected to the interior of the reaction tank, and the stirring blades are evenly spaced on the surface of the rotating rod. This makes the stirring process more uniform, improves the reaction effect, ensures the chemical reaction efficiency of the exhaust gas treatment, and ensures more complete contact between the harmful gases and the treatment reagents, thereby improving the exhaust gas treatment effect.

[0010] Preferably, the surface of the stirring blade is provided with through holes, and the through holes are evenly distributed on the surface of the stirring blade. Here, the through holes facilitate the fluidity of gas or liquid passing through the stirring blade, reduce fluid resistance, and accelerate the reaction rate, making the reaction process smoother, thereby helping to improve the efficiency and effectiveness of exhaust gas treatment.

[0011] Preferably, a protrusion is fixedly mounted on the surface of the bag, and a slot is defined in the surface of the protrusion. A first motor is fixedly mounted on the side of the dust removal bin, and a bidirectional screw is fixedly mounted on the output end of the first motor. A movable plate is threadedly connected to the surface of the bidirectional screw, and an insert is fixedly mounted on the surface of the movable plate. Here, by driving the bidirectional screw through the first motor, the movable plate can automatically move the insert, thereby facilitating the disassembly and assembly of the bag, allowing for regular cleaning and replacement. This reduces the frequency of manual maintenance, improves the automation level of the equipment, maintains the efficient operation of the dust removal equipment, and extends the service life of the bag.

[0012] Preferably, the positions of the inserts correspond to the positions of the slots, and there are two sets of inserts, symmetrically distributed on either side of the bag. The symmetrical distribution of the inserts and slots ensures a more secure fit of the bag, preventing it from loosening or falling off during operation, thereby improving the effectiveness and operational stability of the bag-type dust removal system and further ensuring the reliability of the equipment.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are:

[0014] 1. In the present invention, the exhaust gas is treated by efficiently connecting various functional modules for processing gas in series. The waste heat in the exhaust gas is effectively recovered through the heat exchange pipe, which improves the energy utilization efficiency of the system and reduces the impact of high-temperature gas on subsequent processing units, ensuring the long-term stable operation of the equipment. The cloth bags in the dust removal bin further improve the removal rate of particulate matter in the exhaust gas. The baffle design slows down the airflow, improves the dust settling efficiency, effectively ensures the smoothness of exhaust gas treatment, and reduces the risk of gas leakage, thereby improving the overall operating stability of the equipment.

[0015] 2. In the utility model, the bidirectional screw driven by the No. 1 motor drives the movable plate and the plug block, which can realize the automatic cleaning and replacement of the cloth bags, greatly reducing the need for manual intervention, reducing the maintenance frequency and related labor costs, and improving the automation level of the equipment. At the same time, the automatic cleaning function ensures that the cloth bags are always in the best working condition, maintains a high dust removal efficiency, thereby effectively extending the service life of the cloth bags and ensuring the long-term stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an environmentally friendly blast furnace tail gas treatment device proposed in the utility model;

[0017] Figure 2 This is a cross-sectional view of an air intake bin of an environmentally friendly blast furnace tail gas treatment device proposed in the utility model;

[0018] Figure 3This is a cross-sectional view of a cooling chamber of an environmentally friendly blast furnace tail gas treatment device proposed in the utility model;

[0019] Figure 4 This is a cross-sectional view of a dust removal bin of an environmentally friendly blast furnace tail gas treatment device proposed in the utility model;

[0020] Figure 5 The utility model provides a cross-sectional view of a reaction tank of an environmentally friendly blast furnace tail gas treatment device.

[0021] Legend:

[0022] 1. Air inlet chamber; 2. Air inlet pipe; 3. Connecting pipe No. 1; 4. Passage; 5. Heat exchange chamber; 6. Heat exchange pipe; 7. Recovery pipe; 8. Cooling chamber; 9. Connecting pipe No. 2; 10. Inner plate; 11. Cavity; 12. Condenser pipe; 13. Dust removal chamber; 14. Partition; 15. Connecting port; 16. Cloth bag; 17. Bump; 18. Slot; 19. Motor No. 1; 20. Bidirectional screw; 21. Moving plate; 22. Insert; 23. Connecting pipe No. 3; 24. Reactor; 25. Motor No. 2; 26. Rotating rod; 27. Stirring blade; 28. Through hole; 29. ​​Exhaust pipe. DETAILED DESCRIPTION

[0023] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0025] Example 1

[0026] See also Figure 1-5The utility model provides a technical solution: an environmentally friendly blast furnace tail gas treatment equipment, including an air intake bin 1, a cooling bin 8, a dust removal bin 13 and a reaction tank 24, the air intake bin 1 and the cooling bin 8 are fixedly connected by a No. 1 connecting pipe 3, the cooling bin 8 and the dust removal bin 13 are fixedly connected by a No. 2 connecting pipe 9, and the dust removal bin 13 and the reaction tank 24 are fixedly connected by a No. 3 connecting pipe 23, which realizes efficient series processing between various functional bins, makes the gas treatment process more coherent, reduces the risk of gas leakage, and is also convenient for maintenance and overhaul of each module, thereby improving the overall efficiency of the equipment. Stability and reliability, the No. 1 connecting pipe 3, the No. 2 connecting pipe 9 and the No. 3 connecting pipe 23 are all made of high-temperature corrosion-resistant materials, which not only improves the service life of the equipment in a high-temperature and high-corrosion environment, but also reduces the equipment failure rate, ensuring that the equipment can operate stably for a long time during the blast furnace tail gas treatment process, and reduces maintenance costs. The side of the air intake bin 1 is fixedly installed with an air intake pipe 2, the top of the air intake bin 1 is fixedly installed with a channel 4, the top of the channel 4 is fixedly installed with a heat exchange bin 5, the interior of the heat exchange bin 5 is fixedly installed with a heat exchange tube 6, the outlet end of the heat exchange tube 6 is fixedly installed with a recovery pipe 7, and the cooling bin An inner plate 10 is fixedly installed inside the cooling chamber 8, a cavity 11 is formed between the inner plate 10 and the cooling chamber 8, a condenser 12 is fixedly installed inside the cavity 11, a partition 14 is fixedly installed inside the dust removal chamber 13, a connection port 15 is fixedly installed on the bottom surface of the partition 14, a cloth bag 16 is fixedly installed on the surface of the connection port 15, a No. 2 motor 25 is fixedly installed on the top of the reaction tank 24, a rotating rod 26 is fixedly installed on the output end of the No. 2 motor 25, a stirring blade 27 is fixedly installed on the surface of the rotating rod 26, the rotating rod 26 is connected to the inside of the reaction tank 24, and the stirring blade 27 is formed on the surface of the rotating rod 26. The equidistant distribution makes the stirring process more uniform, improves the reaction effect, ensures the chemical reaction efficiency of the exhaust gas treatment, and makes the contact between the harmful gas and the treatment reagent more complete, thereby improving the exhaust gas treatment effect. The surface of the stirring blade 27 is provided with a through hole 28, and the through holes 28 are evenly distributed on the surface of the stirring blade 27. The through holes 28 are conducive to the fluidity of the gas or liquid when passing through the stirring blade 27, reducing the fluid resistance and accelerating the reaction rate, which can make the reaction process smoother and help improve the efficiency and effect of the exhaust gas treatment. An exhaust pipe 29 is fixedly installed on the top of the reaction tank 24.

[0027] Example 2

[0028] See also Figure 4, a protrusion 17 is fixedly installed on the surface of the bag 16, and a slot 18 is opened on the surface of the protrusion 17. A No. 1 motor 19 is fixedly installed on the side of the dust removal bin 13. A bidirectional screw rod 20 is fixedly installed on the output end of the No. 1 motor 19. A movable plate 21 is threadedly connected to the surface of the bidirectional screw rod 20. An insert block 22 is fixedly installed on the surface of the movable plate 21. By driving the bidirectional screw rod 20 by the No. 1 motor 19, the movable plate 21 can drive the insert block 22 to move automatically, thereby facilitating the disassembly and assembly of the bag 16 for regular cleaning and replacement, reducing labor. The frequency of maintenance is increased, the automation level of the equipment is improved, and at the same time the efficient operation of the dust removal equipment is maintained, and the service life of the bag 16 is extended. The position of the plug 22 corresponds to the position of the slot 18 one by one. There are two groups of plugs 22, and the two groups of plugs 22 are symmetrically distributed on both sides of the bag 16. The symmetrical distribution of the plugs 22 and the slot 18 can ensure that the bag 16 is fixed more firmly, avoiding the loosening or falling off of the bag 16 during operation, improving the dust removal effect of the bag 16 and the stability of operation, and further ensuring the reliability of the equipment.

[0029] Working principle: exhaust gas enters the air intake bin 1 from the blast furnace through the air intake pipe 2. The function of the air intake bin 1 is not only to guide the airflow, but also to provide a stable gas flow channel 4 for subsequent processing steps. After the exhaust gas passes through the air intake bin 1, it enters the connected heat exchange bin 5. In the heat exchange bin 5, the exhaust gas exchanges heat with the heat exchange tube 6, ensuring that the heat of the gas is absorbed by the cooling medium, thereby reducing the temperature of the gas. It can not only protect the equipment from high temperature damage, but also recover and reuse part of the waste heat to achieve the purpose of energy saving and consumption reduction. After heat exchange, the temperature of the gas is significantly reduced, providing suitable temperature conditions for subsequent processing and improving the energy efficiency of the entire system. The exhaust gas after heat exchange treatment enters the cooling bin 8. In the cooling bin 8, the gas is further cooled by the condenser 12. The condenser 12 further reduces the exhaust gas temperature. After cooling is completed, the exhaust gas enters the dust removal bin 13 through the No. 2 connecting pipe 9. In the dust removal bin 13, the gas is first guided by the partition 14. The function of the partition 14 is to slow down the airflow speed and change the flow direction of the gas, increasing the sedimentation chance of particulate matter. Subsequently, the exhaust gas is filtered through the bag 16. The bag 16 can effectively capture fine particles and dust in the exhaust gas, thereby significantly improving the dust removal efficiency. In order to maintain the dust removal effect of the bag 16 and extend its service life, a No. 1 motor 19 is installed on the side of the dust removal bin 13. The motor drives the bidirectional screw 20 to drive the plug 22 installed on the movable plate 21 to move, thereby realizing the automatic disassembly and cleaning function of the bag 16, reducing the frequency of manual cleaning, reducing maintenance costs, and improving the degree of automation of the equipment. Through the dust removal mechanism, most of the particulate matter in the exhaust gas can be successfully filtered, ensuring the smooth progress of subsequent processing steps. The exhaust gas that has been dust-removed enters the reaction tank 24 through the No. 3 connecting pipe 23. In the reaction tank 24, the exhaust gas is fully mixed with the chemical reagent to complete the reaction. In the final chemical reaction step, a No. 2 motor 25 is installed on the top of the reaction tank 24. The motor drives the rotating rod 26 to rotate, driving the stirring blades 27 evenly distributed on the surface of the rotating rod 26 to rotate. The equidistant distribution design of the stirring blades 27 can ensure the mixing effect inside the reaction tank 24, and the exhaust gas and chemical reagents can be fully in contact, thereby ensuring the reaction efficiency of the harmful gas and the reagent. The surface of the stirring blade 27 is provided with evenly distributed through holes 28. The through holes 28 help to improve the fluidity of the gas, reduce fluid resistance, further accelerate the mixing rate of the gas and reagents, and thus improve the efficiency of the chemical reaction. Harmful substances in the exhaust gas, such as sulfur dioxide and other polluting gases, are decomposed or converted into harmless by-products, thereby meeting the standards of environmental protection emissions.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An environmentally friendly blast furnace tail gas treatment device, comprising an air intake bin (1), a cooling bin (8), a dust removal bin (13) and a reaction tank (24), characterized in that: An air intake pipe (2) is fixedly installed on the side of the air intake bin (1), a channel (4) is fixedly installed on the top of the air intake bin (1), a heat exchange bin (5) is fixedly installed on the top of the channel (4), a heat exchange tube (6) is fixedly installed inside the heat exchange bin (5), a recovery tube (7) is fixedly installed at the outlet end of the heat exchange tube (6), an inner plate (10) is fixedly installed inside the cooling bin (8), a cavity (11) is formed between the inner plate (10) and the cooling bin (8), and a cooling tube (11) is fixedly installed inside the cavity (11). The condensation tube (12) is fixedly installed with a partition (14) inside the dust removal bin (13), the bottom surface of the partition (14) is fixedly installed with a connection port (15), the surface of the connection port (15) is fixedly installed with a cloth bag (16), the top of the reaction tank (24) is fixedly installed with a No. 2 motor (25), the output end of the No. 2 motor (25) is fixedly installed with a rotating rod (26), the surface of the rotating rod (26) is fixedly installed with a stirring blade (27), and the top of the reaction tank (24) is fixedly installed with an exhaust pipe (29).

2. The environmentally friendly blast furnace tail gas treatment equipment according to claim 1, characterized in that: The air inlet bin (1) and the cooling bin (8) are fixedly connected via a No. 1 connecting pipe (3), the cooling bin (8) and the dust removal bin (13) are fixedly connected via a No. 2 connecting pipe (9), and the dust removal bin (13) and the reaction tank (24) are fixedly connected via a No. 3 connecting pipe (23).

3. The environmentally friendly blast furnace tail gas treatment equipment according to claim 2, characterized in that: The No. 1 connecting pipe (3), the No. 2 connecting pipe (9) and the No. 3 connecting pipe (23) are all made of high-temperature corrosion-resistant materials.

4. The environmentally friendly blast furnace tail gas treatment equipment according to claim 1, characterized in that: The rotating rod (26) is rotatably connected inside the reaction tank (24), and the stirring blades (27) are evenly distributed on the surface of the rotating rod (26).

5. The environmentally friendly blast furnace tail gas treatment equipment according to claim 1, characterized in that: The surface of the stirring blade (27) is provided with through holes (28), and the through holes (28) are evenly distributed on the surface of the stirring blade (27).

6. The environmentally friendly blast furnace tail gas treatment equipment according to claim 1, characterized in that: A protrusion (17) is fixedly mounted on the surface of the cloth bag (16), and a slot (18) is provided on the surface of the protrusion (17). A No. 1 motor (19) is fixedly mounted on the side of the dust removal bin (13), and a bidirectional screw rod (20) is fixedly mounted on the output end of the No. 1 motor (19). A movable plate (21) is threadedly connected to the surface of the bidirectional screw rod (20), and an insert block (22) is fixedly mounted on the surface of the movable plate (21).

7. The environmentally friendly blast furnace tail gas treatment equipment according to claim 6, characterized in that: The positions of the insert blocks (22) correspond to the positions of the slots (18) one by one. There are two groups of the insert blocks (22), and the two groups of the insert blocks (22) are symmetrically distributed on both sides of the cloth bag (16).

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