Steel furnace tail gas treatment device

Abstract

The utility model relates to the technical field of tail gas treatment, in particular to a steel furnace tail gas treatment device which comprises a base, a treatment box is installed on the top of the base, a front partition plate and a rear partition plate are installed on the inner wall of the treatment box respectively, and an air pipe is arranged on the side wall, located on one side of the front partition plate, of the treatment box. And one side of the air pipe communicates with an air inlet of the exhaust fan, a cooling mechanism for cooling the tail gas is arranged between the front partition plate and the rear partition plate, and a purification mechanism for desulfurizing the tail gas is arranged on the side, close to the rear partition plate, of the treatment box. The cooling mechanism is arranged, the cavity between the front partition plate and the rear partition plate is filled with cold water, when waste gas passes through the snakelike copper pipes, the cold water can absorb heat of the waste gas, the purpose of cooling the waste gas is achieved, meanwhile, water in the cavity is pumped into the plate heat exchanger through the water pump, and the water is discharged into the cavity after being cooled through the plate heat exchanger. Water is always kept at a low temperature, and the situation that the cooling effect on waste gas is affected after cold water absorbs heat and becomes hot is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a steelmaking furnace tail gas treatment device. Background Art

[0002] Steelmaking refers to controlling the carbon content (generally less than 2%), eliminating harmful elements such as P, S, O, and N, retaining or increasing beneficial elements such as Si, Mn, Ni, and Cr, and adjusting the ratio between elements to obtain optimal performance. Pig iron for steelmaking is placed in a steelmaking furnace and smelted according to a certain process to obtain steel. The exhaust gas generated by the steelmaking furnace contains a large amount of impurities and sulfur dioxide, which will be directly discharged to pollute the environment. At the same time, the waste gas generated will also be accompanied by this higher temperature. If the waste gas is directly discharged into the surrounding environment without treatment, it will pollute the surrounding environment.

[0003] Publication No.: CN217431179U discloses an exhaust gas treatment mechanism for a steelmaking furnace used for steelmaking, including an exhaust gas treatment box and a cold water tank. When the exhaust gas passes through the filter, it will be sucked into the cooling chamber by an exhaust pump. At this time, due to the attraction force, the baffle will move in the limiting slide groove through the limiting slider, causing it to squeeze the buffer spring to deform. When the exhaust pump stops sucking air, the baffle and the filter will be rebounded by the buffer spring to vibrate, thereby shaking off impurities remaining on the filter. The exhaust gas sucked by the exhaust pump will enter the inner side of the cooling chamber through the air inlet pipe. At this time, the exhaust fan can extract the exhaust gas in the cooling chamber through the exhaust pipe. When the exhaust gas flows downward, it will be cooled by the surface of the cooling elbow. The cooling water in the cooling elbow is discharged to the inner side of the cold water tank through the outlet pipe, and the circulating water pump can extract the cooling water in the cold water tank and transport it to the cooling elbow. The filtered and cooled exhaust gas will be discharged through the exhaust port to avoid pollution to the external environment.

[0004] The applicant found that there are some shortcomings in use: the patent absorbs heat in the exhaust gas through the cooling elbow to achieve the purpose of cooling, but after the cold water absorbs heat and becomes hot, the effect of absorbing heat will be greatly reduced, affecting the effect of cooling the exhaust gas.

[0005] Therefore, the utility model designs a steelmaking furnace tail gas treatment device to solve the problems existing in the prior art. Utility Model Content

[0006] The purpose of the utility model is to provide a steelmaking furnace tail gas treatment device to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a steelmaking furnace exhaust gas treatment device, comprising: a base, a treatment box installed on the top of the base, the inner walls of the treatment box are respectively installed with a front partition and a rear partition, the side wall of the treatment box located on one side of the front partition is provided with an air duct, one side of the air duct is connected to the air inlet of the exhaust fan, a filter is slidably installed in the air duct, the air duct is provided with a disassembly mechanism for facilitating the disassembly of the filter, a cooling mechanism for cooling the exhaust gas is provided between the front partition and the rear partition, a purification mechanism for desulfurizing the exhaust gas is provided on the side of the treatment box close to the rear partition, the exhaust fan draws air to generate negative pressure in the air duct, and the exhaust gas is drawn into the air duct, and when the exhaust gas passes through the filter, the filter filters the exhaust gas, and the filtered exhaust gas passes through the cooling and purification mechanism, thereby avoiding thermal pollution to the environment caused by high-temperature exhaust gas, and at the same time avoiding sulfur dioxide in the exhaust gas from polluting the air.

[0008] Preferably, the easy-to-disassemble mechanism includes a small limiting ring, which is fixedly mounted on the inner wall of the air duct away from the exhaust fan. A rotating drum is provided on one side of the air duct, and an internal thread is provided on one side of the inner wall of the rotating drum. An external thread is provided on the outer wall of the air duct located on the side of the rotating drum. A large limiting ring is installed on the side of the inner wall of the rotating drum away from the internal thread. The air duct is rotated to separate the internal and external threads, and the air duct is removed from the air duct. The large limiting ring is away from the small limiting ring, and the clamping of the filter can be released. The staff can then take out the filter for cleaning and replacement.

[0009] Preferably, a handle is installed on the outer side wall of the rotating drum, which makes it convenient for staff to rotate the rotating drum.

[0010] Preferably, the cooling mechanism includes two connecting boxes, one of the connecting boxes is connected to the air outlet of the exhaust fan through an air inlet pipe, and the other connecting box is connected to an air outlet pipe, and the air outlet pipe passes through the top of the rear partition. A number of serpentine copper tubes are provided between the two connecting boxes. By diverting the exhaust gas through the several serpentine copper tubes, the contact area between the exhaust gas and the water in the cavity between the front and rear partitions can be increased, thereby improving the effect of cooling the exhaust gas.

[0011] Preferably, a water pump connected to the treatment box is installed on the top of the treatment box, and the water pump is connected to a plate heat exchanger connected to the treatment box. The water pump draws water that absorbs the heat of the exhaust gas into the plate heat exchanger, and the plate heat exchanger cools the hot water and then discharges it into the treatment box, so that the water always maintains a low temperature, avoiding overheating of the water and affecting the effect of absorbing heat.

[0012] Preferably, the purification mechanism includes a liquid storage tank, which is installed on one side of the top of the treatment box. A long box is installed on the inner wall of the top of the treatment box on one side of the rear partition. The long box is connected to the liquid storage tank through a connecting pipe. A number of nozzles are provided on both sides of the long box. The desulfurization agent sprayed on the long box can desulfurize the exhaust gas, avoid sulfur dioxide in the exhaust gas from polluting the air, and improve the treatment effect.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0014] 1. This utility model uses a cooling mechanism to fill the cavity between the front and rear partitions with cold water. When the exhaust gas passes through a number of serpentine copper tubes, the cold water absorbs the heat of the exhaust gas, thereby achieving the purpose of cooling the exhaust gas. At the same time, a water pump draws the water in the cavity into the plate heat exchanger, which cools the water before discharging it into the cavity. This keeps the water at a low temperature and prevents the cold water from absorbing heat and becoming hot, which would affect the cooling effect on the exhaust gas.

[0015] 2. The utility model adopts the setting of the purification mechanism. After the exhaust gas cools down, it flows into the cavity on one side of the rear partition. The nozzle of the long box sprays out the desulfurizer to desulfurize the exhaust gas. Finally, the exhaust gas is discharged into the atmosphere, avoiding the sulfur dioxide in the exhaust gas from polluting the air and improving the treatment effect.

[0016] 3. The utility model is provided with a disassembly mechanism. When the filter needs to be cleaned and replaced, the drum is rotated to separate the drum from the air duct and the filter can be taken out, making it convenient for the staff to remove the filter for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main cross-sectional view of the present utility model;

[0018] Figure 2 This is an exploded schematic diagram of the easy-to-disassemble mechanism of the utility model;

[0019] Figure 3 It is a rear view schematic diagram of the present utility model.

[0020] In the figure: 1. Base; 2. Processing box; 3. Front partition; 4. Rear partition; 5. Air duct; 6. Exhaust fan; 7. Filter; 8. Easy disassembly mechanism; 9. Cooling mechanism; 10. Purification mechanism; 801. Small limit ring; 802. Rotating drum; 803. Internal thread; 804. External thread; 805. Large limit ring; 901. Connecting box; 902. Serpentine copper tube; 903. Water pump; 904. Plate heat exchanger; 101. Liquid storage tank; 102. Long box; 103. Connecting pipe; 104. Nozzle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-3 The utility model provides an embodiment: a steelmaking furnace exhaust gas treatment device, comprising: a base 1, a treatment box 2 is installed on the top of the base 1, and a front partition 3 and a rear partition 4 are installed on the inner walls of the treatment box 2 respectively. The side wall of the treatment box 2 located on the side of the front partition 3 is provided with an air duct 5, one side of the air duct 5 is connected with the air inlet of the exhaust fan 6, a filter screen 7 is slidably installed in the air duct 5, and a disassembly mechanism 8 for facilitating the disassembly of the filter screen 7 is provided on the air duct 5, a cooling mechanism 9 for cooling the exhaust gas is provided between the front partition 3 and the rear partition 4, and a purification mechanism 10 for desulfurizing the exhaust gas is provided on the side of the treatment box 2 close to the rear partition 4.

[0023] See also Figure 2-3 , in this embodiment: the disassembly mechanism 8 includes a small limiting ring 801, which is fixedly mounted on the inner wall of the air duct 5 away from the exhaust fan 6. A rotating cylinder 802 is provided on one side of the air duct 5, and an inner wall of the rotating cylinder 802 is provided with an internal thread 803. The outer wall of the air duct 5 on the side of the rotating cylinder 802 is provided with an external thread 804. A large limiting ring 805 is installed on the side of the inner wall of the rotating cylinder 802 away from the internal thread 803. Put the filter into the air duct, one side of the filter contacts the small limiting ring, and then rotate the air cylinder and turn the air cylinder onto the air duct so that the large limiting ring contacts the other side of the filter, so that the filter can be limited. When cleaning the filter, turn down the air cylinder to take out the filter, which is convenient for cleaning the filter.

[0024] See also Figure 1 In this embodiment, a handle is installed on the outer wall of the rotating drum 802, and a rubber sleeve is provided on the outer wall of the handle to improve the comfort of the staff when rotating.

[0025] See also Figure 1 In this embodiment: the cooling mechanism 9 includes two connecting boxes 901, one connecting box 901 is connected to the air outlet of the exhaust fan 6 through an air inlet pipe, and the other connecting box 901 is connected to the air outlet pipe, and the air outlet pipe passes through the top of the rear partition 4. A number of serpentine copper tubes 902 are provided between the two connecting boxes 901. By diverting the exhaust gas through a number of serpentine copper tubes, the contact between the exhaust gas and water can be improved, thereby improving the effect of cooling the exhaust gas. A water inlet is provided in the middle of the top of the treatment box for convenient water addition.

[0026] See also Figure 1In this embodiment: a water pump 903 connected to the processing box 2 is installed on the top of the processing box 2, and the water pump 903 is connected to a plate heat exchanger 904 connected to the processing box 2. The pipe on the water pump passes through the bottom of the interior of the processing box, and the water outlet of the plate heat exchanger passes through the top of the interior of the processing box.

[0027] See also Figure 1 In this embodiment: the purification mechanism 10 includes a liquid storage tank 101, which is installed on one side of the top of the processing box 2. A long box 102 is installed on the inner wall of the top of the processing box 2 on one side of the rear partition 4. The long box 102 is connected to the liquid storage tank 101 through a connecting pipe 103. A number of nozzles 104 are provided on both sides of the long box 102. An exhaust pipe is provided above the side wall of the processing box on one side of the long box for discharging the exhaust gas after purification.

[0028] Working principle: Start the exhaust fan 6, so that the air duct 5 generates negative pressure to suck the exhaust gas into the connection box 901, and the filter screen 7 filters the exhaust gas. The filtered exhaust gas passes through the serpentine copper tube 902. The treatment box 2 located between the front partition 3 and the rear partition 4 is filled with cold water. The cold water absorbs the heat of the exhaust gas in the serpentine copper tube 902, thereby cooling the exhaust gas. When the temperature of the cold water increases after absorbing heat, it will affect the cooling effect. The water pump 903 can be started to pump the heated water into the plate heat exchanger 904. The plate heat exchanger 904 cools the heated water, and after cooling, it is discharged into the treatment box 2 for continued use, thereby improving the cooling effect of the exhaust gas. The cooled exhaust gas Entering the treatment box 2 and located on one side of the rear partition 4, the nozzle 104 sprays out a desulfurizing agent to desulfurize the exhaust gas, and finally the exhaust gas is discharged into the atmosphere, avoiding thermal pollution to the environment caused by high-temperature exhaust gas, and at the same time avoiding sulfur dioxide in the exhaust gas from polluting the air. When the filter 7 needs to be removed for cleaning or replacement, the rotary drum 802 is rotated to separate the internal thread 803 and the plate heat exchanger 904, and the rotary drum 802 can be removed from the air duct 5. The large limit ring 805 cancels the limit on the filter 7, and the filter 7 can be taken out for cleaning or replacement. The content not described in detail in this description belongs to the existing technology known to professional and technical personnel in this field.

[0029] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A steelmaking furnace tail gas treatment device, comprising: A base (1) is characterized in that: a treatment box (2) is installed on the top of the base (1), and a front partition (3) and a rear partition (4) are installed on the inner wall of the treatment box (2), and an air duct (5) is provided on the side wall of the treatment box (2) located on the side of the front partition (3), and one side of the air duct (5) is connected to the air inlet of the exhaust fan (6), a filter (7) is slidably installed in the air duct (5), and a disassembly mechanism (8) for facilitating the disassembly of the filter (7) is provided on the air duct (5), a cooling mechanism (9) for cooling the exhaust gas is provided between the front partition (3) and the rear partition (4), and a purification mechanism (10) for desulfurizing the exhaust gas is provided on the side of the treatment box (2) close to the rear partition (4).

2. The steelmaking furnace tail gas treatment device according to claim 1, characterized in that: The easy-to-disassemble mechanism (8) comprises a small limiting ring (801), which is fixedly mounted on the inner wall of the air duct (5) away from the exhaust fan (6); a rotating drum (802) is provided on one side of the air duct (5); an inner wall of the rotating drum (802) is provided with an internal thread (803); an outer wall of the air duct (5) located on the side of the rotating drum (802) is provided with an external thread (804); and a large limiting ring (805) is mounted on the inner wall of the rotating drum (802) away from the internal thread (803).

3. The steelmaking furnace tail gas treatment device according to claim 2, characterized in that: A turning handle is installed on the outer side wall of the rotating drum (802).

4. The steelmaking furnace tail gas treatment device according to claim 1, characterized in that: The cooling mechanism (9) comprises two connecting boxes (901), one connecting box (901) is connected to the air outlet of the exhaust fan (6) via an air inlet pipe, and the other connecting box (901) is connected to an air outlet pipe, and the air outlet pipe passes through the top of the rear partition (4), and a plurality of serpentine copper tubes (902) are provided between the two connecting boxes (901).

5. The steelmaking furnace tail gas treatment device according to claim 4, characterized in that: A water pump (903) in communication with the processing box (2) is installed on the top of the processing box (2), and the water pump (903) is in communication with a plate heat exchanger (904) in communication with the processing box (2).

6. The steelmaking furnace tail gas treatment device according to claim 1, characterized in that: The purification mechanism (10) comprises a liquid storage tank (101), the liquid storage tank (101) being installed on one side of the top of the treatment tank (2), a long box (102) being installed on the inner wall of the top of the treatment tank (2) on one side of the rear partition (4), the long box (102) being connected to the liquid storage tank (101) via a connecting pipe (103), and a plurality of nozzles (104) being provided on both sides of the long box (102).

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