A smelting tail gas desulfurization and denitrification device

Abstract

The utility model relates to desulfurization and denitration technical field, and disclose a kind of smelting tail gas desulfurization and denitration device, including machine body, the air inlet is fixedly installed in machine body one side, the water inlet is fixedly installed in machine body in air inlet same side, the pollution outlet is fixedly installed in machine body other side, the gas outlet is fixedly installed in machine body top, the transmission mechanism that tail gas is controlled and handled is provided in machine body other side. By single motor drive, the synchronous movement of reciprocating screw rod and fan blade is realized, and the fan blade of rotation forms stable airflow field in device middle part, which prolongs the residence time of harmful tail gas in reaction zone, and creates gas-liquid mixing environment, and the cyclone makes the residence time of liquid droplet longer, and reciprocating motion avoids spraying dead angle, increases reaction contact area, prolongs reaction time, ensures that the reaction efficiency of desulfurization and denitration agent and pollutants in tail gas maximization, improves the purification efficiency and reaction rate of main body.

Description

Technical Field

[0001] This utility model relates to the field of desulfurization and denitrification technology, specifically a desulfurization and denitrification device for smelting tail gas. Background Technology

[0002] Desulfurization and denitrification technology is a boiler flue gas purification technology applied to the chemical industry that generates nitrogen oxides and sulfur oxides. Nitrogen oxides and sulfur oxides are one of the main sources of air pollution, so the application of this technology has many benefits for environmental air purification. Therefore, desulfurization and denitrification equipment uses this technology to desulfurize and denitrify the tail gas of the side-blown furnace for smelting waste slag.

[0003] According to a publicized desulfurization and denitrification device for smelting tail gas from a side-blown furnace (publication number: CN219111142U), the above application adopts a spraying mechanism. The desulfurization and denitrification agent is atomized into water mist and sprayed out through several nozzles. Then, the first gear is driven to rotate by the driver, and through the meshing transmission between the first gear and the second gear, several nozzles can be driven to rotate, thereby expanding the spraying range of the nozzles and allowing the water mist to fully contact the tail gas, thus improving the device's tail gas treatment efficiency.

[0004] However, in actual use, the reaction time between the water mist and the exhaust gas in the above-mentioned equipment is insufficient, and the reaction is not fully carried out, which easily leads to the exhaust gas that is not completely treated being discharged through the outlet. In view of this, we propose a desulfurization and denitrification device for smelting exhaust gas. Utility Model Content

[0005] The purpose of this invention is to provide a desulfurization and denitrification device for smelting tail gas to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a desulfurization and denitrification device for smelting tail gas, comprising a body, an air inlet fixedly installed on one side of the body, a water inlet fixedly installed on the same side of the body as the air inlet, a sewage outlet fixedly installed on the other side of the body, a control valve fixedly installed above the sewage outlet, an air outlet fixedly installed on the top of the body, a telescopic pipe fixedly connected to the water inlet, and a transmission mechanism for controlling and treating the tail gas provided on the other side of the body.

[0007] Preferably, the transmission mechanism includes a rotating rod, a gear one sleeved on the outer side of the rotating rod, a support frame fixedly connected to the outer side of the machine body, a motor fixedly mounted on the support frame, a rotating shaft fixedly connected to the output end of the motor, a gear two sleeved on the rotating shaft, a chain rotatably connected to the gear one, a limiting block fixedly connected to the inner wall of the machine body, a reciprocating threaded rod fixedly connected to the groove of the limiting block, the reciprocating threaded rod rotatably connected to the rotating shaft, a sliding block rotatably connected to the outside of the reciprocating threaded rod, the sliding block slidably connected to the limiting block, a water pipe fixedly connected to the bottom of the sliding block, a nozzle fixedly connected to one end of the water pipe, and a fan blade fixedly connected to the part of the rotating rod inside the machine body.

[0008] Preferably, the outlet has a dust removal mechanism for treating dust and impurities in the exhaust gas. The dust removal mechanism includes a filter screen, which is fixedly connected to the outlet. A demister is fixedly installed inside the outlet.

[0009] Preferably, gear one meshes with a chain, and the chain meshes with gear two, and gear one and gear two are the same size.

[0010] Preferably, the nozzle is provided with several sets of nozzles, which are arranged in an array at the bottom of the nozzle.

[0011] Preferably, the sliding block has a groove for liquid to flow through, and the diameter of the groove is the same as the diameter of the telescopic pipe and the diameter of the water pipe, and the reciprocating threaded rod rotates coaxially with the rotating shaft.

[0012] Preferably, the size of the air outlet is the same as the size of the filter screen.

[0013] Compared with the prior art, this utility model provides a desulfurization and denitrification device for smelting tail gas, which has the following beneficial effects:

[0014] 1. This desulfurization and denitrification device for smelting tail gas is driven by a single motor, which realizes the synchronous movement of the reciprocating screw rod and the fan blade. The rotating fan blade forms a stable airflow field in the middle of the device. This extends the residence time of harmful tail gas in the reaction zone and creates a gas-liquid mixing environment. The swirling flow makes the droplets stay for a longer time. The reciprocating motion avoids spray dead zones, increases the reaction contact area, and extends the reaction time, ensuring that the reaction efficiency of the desulfurization and denitrification agent with pollutants in the tail gas is maximized, thereby improving the purification efficiency and reaction rate of the main body.

[0015] 2. This desulfurization and denitrification device for smelting tail gas synergistically removes large particulate impurities such as unreacted particulate matter and reaction crystallization byproducts carried in the flue gas, as well as tiny droplets generated by atomized spraying. It effectively prevents secondary carryover, ensures the cleanliness of the final emitted flue gas, meets the increasingly stringent ultra-low emission environmental protection regulations, and has outstanding environmental benefits. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the air outlet part of this utility model.

[0020] In the diagram: 1. Body; 2. Air inlet; 3. Water inlet; 4. Sewage outlet; 5. Control valve; 6. Air outlet; 7. Transmission mechanism; 701. Rotating rod; 702. Gear 1; 703. Chain; 704. Support frame; 705. Motor; 706. Rotating shaft; 707. Gear 2; 708. Fan blade; 709. Reciprocating threaded rod; 710. Limiting block; 8. Telescopic tube; 9. Sliding block; 10. Nozzle; 11. Dust removal mechanism; 111. Filter screen; 112. Demister; 12. Water pipe. Detailed Implementation

[0021] like Figures 1-4 As shown, this utility model provides a technical solution: a desulfurization and denitrification device for smelting tail gas, including a body 1, an air inlet 2 fixedly installed on one side of the body 1, a water inlet 3 fixedly installed on the same side of the body 1 as the air inlet 2, a sewage outlet 4 fixedly installed on the other side of the body 1, a control valve 5 fixedly installed above the sewage outlet 4, an air outlet 6 fixedly installed on the top of the body 1, a telescopic pipe 8 fixedly connected to the water inlet 3, and a transmission mechanism 7 for controlling and treating the tail gas on the other side of the body 1. The transmission mechanism 7 includes a rotating rod 701, a first gear 702, a chain 703, a support frame 704, a motor 705, a rotating shaft 706, a second gear 707, a fan blade 708, a reciprocating threaded rod 709, and a limiting block 710.

[0022] In one embodiment of this utility model, the transmission mechanism 7 includes a rotating rod 701, a gear 702 sleeved on the outer side of the rotating rod 701, a support frame 704 fixedly connected to the outer side of the machine body 1, a motor 705 fixedly mounted on the support frame 704, a rotating shaft 706 fixedly connected to the output end of the motor 705, a gear 707 sleeved on the rotating shaft 706, a chain 703 rotatably connected to the gear 702, a limiting block 710 fixedly connected to the inner wall of the machine body 1, a reciprocating threaded rod 709 fixedly connected in the groove of the limiting block 710, the reciprocating threaded rod 709 rotatably connected to the rotating shaft 706, a sliding block 9 rotatably connected to the outside of the reciprocating threaded rod 709, the sliding block 9 slidably connected to the limiting block 710, a water pipe 12 fixedly connected to the bottom of the sliding block 9, a nozzle 10 fixedly connected to one end of the water pipe 12, and a fan blade 708 fixedly connected to the part of the rotating rod 701 inside the machine body 1.

[0023] Additionally, an air inlet 2 is fixedly installed on one side wall of the machine body 1. This air inlet 2 is used to introduce the smelting tail gas to be treated into the device. On the same side wall as the air inlet 2, a water inlet 3 is also fixedly installed. This water inlet 3 is used to connect to an external reagent supply system to input the absorbent liquid required for desulfurization and denitrification into the device. At the bottom of the other side wall opposite to the air inlet 2 on the machine body 1, a drain outlet 4 is fixedly installed. This is used to periodically discharge the waste liquid and sediment generated after the reaction. To control the discharge process, a control valve 5 is fixedly installed on the pipe above the drain outlet 4. An air outlet 6 is fixedly installed on the top of the machine body 1. The clean gas after purification treatment will be discharged from this outlet. The water inlet 3 extends into the interior of the machine body 1 through a pipe. Its end is fixedly connected to a retractable telescopic pipe 8 to accommodate the displacement of internal moving parts. On the outside of the side of the machine body 1 where the drain outlet 4 is installed, a transmission mechanism 7 is provided for controlling and treating the tail gas.

[0024] In addition, the transmission mechanism 7 is a key part of the device to realize its core function. It includes a rotating rod 701, a gear 702 fixedly sleeved on the outside of the rotating rod 701, a chain 703 meshing with the gear 702, a support frame 704 fixedly connected to the outside of the machine body 1 to provide stable support, a motor 705 fixedly mounted on the support frame 704, a rotating shaft 706 driven by the motor 705, a gear 707 fixedly sleeved on the rotating shaft 706, a fan blade 708 fixedly connected to the section of the rotating rod 701 that extends into the machine body 1, a reciprocating threaded rod 709 that is rotatably connected to the rotating shaft 706 through a transmission component, and a chain fixedly connected to the machine body. A limiting block 710 is located on the inner wall of the 1st floor. The limiting block 710 has a guide groove inside. The two ends of the reciprocating threaded rod 709 are usually fixedly installed in this groove through bearing seats to determine its axial position. A sliding block 9 with a threaded hole inside is sleeved on the reciprocating threaded rod 709 and forms a helical pair with it. At the same time, the side of the sliding block 9 slides with the guide groove of the limiting block 710, thereby converting the rotational motion of the reciprocating threaded rod 709 into the linear reciprocating motion of the sliding block 9. A water pipe 12 is fixedly connected to the bottom of the sliding block 9. The water inlet end of the water pipe 12 is connected to the pipeline of the water inlet 3, and multiple nozzles 10 for atomizing liquid are fixedly installed at its outlet end.

[0025] In an embodiment of this utility model, a dust removal mechanism 11 is provided inside the air outlet 6 to perform final treatment of residual dust, impurities, and droplets in the exhaust gas. The dust removal mechanism 11 mainly includes a filter screen 111 and a demister 112. The filter screen 111 is fixedly installed at one end of the air outlet 6 near the inside of the body 1. Its function is to intercept and filter larger particles or solid crystals generated by the reaction that may be carried in the exhaust gas. The internal flow cross-sectional size of the air outlet 6 matches the effective filtration area of ​​the filter screen 111. The outer edge shape of the filter screen 111 is tightly fitted with the inner wall of the air outlet 6, and its area is basically consistent with the cross-sectional area of ​​the air outlet 6 to prevent the airflow from bypassing the filter screen 111 and ensure that all exhaust gas is filtered. The demister 112 is fixedly installed inside the air outlet 6 and is usually located upstream of the airflow after the filter screen 111. It can effectively capture fine mist droplets and aerosols entrained in the exhaust gas after the spray reaction, prevent liquid entrainment, and ensure clean exhaust gas.

[0026] In this invention, during use, the motor 705 is first started, and its output shaft drives the rotating shaft 706 and the gear 707 fixed thereon to rotate synchronously. The gear 707 transmits power to the gear 702 through the chain 703 meshing with it, thereby driving the rotating rod 701 and the fan blade 708 at its end to rotate at high speed. The rotation of the fan blade 708 forms a forced vortex inside the machine body 1, allowing the exhaust gas entering from the air inlet 2 to gather in the middle of the machine body 1, providing sufficient time for the gas to react with the desulfurization and denitrification liquid. At the same time, the rotational motion of the rotating shaft 706 drives the reciprocating threaded rod 709 to rotate. The sliding block 9, which is threadedly connected to the reciprocating threaded rod 709, converts the rotational motion into a horizontal linear reciprocating motion under the constraint of the limiting block 710. The sliding block 9 moves together with the water pipe 12 and the nozzle 10. The desulfurization and denitrification absorption liquid is introduced from the inlet 3, passes through the telescopic pipe 8, the flow channel inside the sliding block 9, and the water pipe 12, and is finally atomized and sprayed out by the reciprocating nozzle 10. The atomized droplets come into efficient contact with the exhaust gas that is fully agitated by the fan blade 708, and the desulfurization and denitrification reaction is completed. The purified gas rises to the top of the machine body 1 and is discharged through the outlet 6. Before being discharged, the gas passes through the filter screen 111 and the demister 112 in the dust removal mechanism 11. The filter screen 111 intercepts solid particles, and the demister 112 removes the mist droplets, and finally achieves clean discharge. The waste liquid and sediment after the reaction accumulate at the bottom of the machine body 1 and can be discharged periodically through the drain outlet 4 by controlling the valve 5.

[0027] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A desulfurization and denitrification device for smelting tail gas, comprising a body (1), an air inlet (2) fixedly installed on one side of the body (1), a water inlet (3) fixedly installed on the same side of the body (1) as the air inlet (2), a sewage outlet (4) fixedly installed on the other side of the body (1), a control valve (5) fixedly installed above the sewage outlet (4), an air outlet (6) fixedly installed on the top of the body (1), and a telescopic pipe (8) fixedly connected to the water inlet (3), characterized in that: A transmission mechanism (7) for controlling and processing exhaust gas is provided on the other side of the body (1).

2. A device for desulphurization and denitrification of smelting off-gas according to claim 1, characterized in that: The transmission mechanism (7) includes a rotating rod (701), a gear 1 (702) is sleeved on the outside of the rotating rod (701), a support frame (704) is fixedly connected to the outside of the machine body (1), a motor (705) is fixedly installed on the support frame (704), a rotating shaft (706) is fixedly connected to the output end of the motor (705), a gear 2 (707) is sleeved on the rotating shaft (706), a chain (703) is rotatably connected to the gear 1 (702), and a limiting block (710) is fixedly connected to the inner wall of the machine body (1). The limiting block (710) has a reciprocating threaded rod (709) fixedly connected in the groove. The reciprocating threaded rod (709) is rotatably connected to the rotating shaft (706). A sliding block (9) is rotatably connected to the outside of the reciprocating threaded rod (709). The sliding block (9) is slidably connected to the limiting block (710). A water pipe (12) is fixedly connected to the bottom of the sliding block (9). A nozzle (10) is fixedly connected to one end of the water pipe (12). A fan blade (708) is fixedly connected to the part of the rotating rod (701) inside the machine body (1).

3. The device for desulphurization and denitrification of smelting off-gas according to claim 1, characterized in that: The outlet (6) contains a dust removal mechanism (11) for treating dust and impurities in the exhaust gas. The dust removal mechanism (11) includes a filter screen (111), which is fixedly connected to the outlet (6). A demister (112) is fixedly installed inside the outlet (6).

4. The device for desulphurization and denitrification of smelting off-gas according to claim 2, characterized in that: The first gear (702) meshes with the chain (703), the chain (703) meshes with the second gear (707), and the first gear (702) and the second gear (707) are the same size.

5. The device for desulphurization and denitrification of smelting off-gas according to claim 2, characterized in that: The nozzle (10) is provided with several sets of nozzles, which are arranged in an array at the bottom of the nozzle (10).

6. A device for desulphurization and denitrification of smelting off-gas according to claim 2, characterized in that: The sliding block (9) has a groove for liquid to flow through, and the diameter of the groove is the same as the diameter of the telescopic pipe (8) and the diameter of the water pipe (12). The reciprocating threaded rod (709) rotates coaxially with the rotating shaft (706).

7. The device for desulphurization and denitrification of smelting off-gas according to claim 3, characterized in that: The size of the air outlet (6) is the same as the size of the filter screen (111).

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