Waste gas purification equipment of steel smelting furnace

Abstract

The utility model discloses waste gas purification equipment of a steel smelting furnace, which comprises an exhaust fume collecting hood, a flue gas inlet pipe A, a flue gas inlet pipe B, an induced draft fan, a primary filter, a spray tower, a flue gas drying box and a filter module, the spray tower, the flue gas drying box and the filter module are arranged along the flue gas output direction, the flue gas inlet pipe B is connected with an inlet on the upper side of the spray tower, and the primary filter is connected with the induced draft fan. An induced draft fan is arranged at the tail end of the flue gas inlet pipe B; the air inlet side of the induced draft fan is connected with a primary filter through a flange, the primary filter is connected with a flue gas inlet pipe A, the tail end of the flue gas inlet pipe A is provided with a flue gas collecting hood, the flue gas collecting hood is communicated with a flue gas outlet of the smelting furnace, and the flue gas collecting hood is internally provided with a shunting frame for shunting flue gas impact; a spraying cavity is formed in the spraying tower and is sequentially divided into a first-stage spraying cavity, a second-stage spraying cavity and a gas outlet cavity from top to bottom through partition plates. The purification device disclosed by the utility model is strong in cohesion, capable of realizing continuous treatment on waste gas and relatively high in treatment efficiency.

Description

Technical Field

[0001] The utility model relates to the field of steel smelting, in particular to waste gas purification equipment of a steel smelting furnace. Background Art

[0002] Steel is widely used. It is an alloy composed of iron, carbon, manganese and other small amounts of other elements. It is mainly produced from iron ore. When iron ore is smelted through a smelting furnace, the exhaust gas discharged from above the furnace contains a large amount of dust and a small amount of harmful substances, which brings great inconvenience to outside workers.

[0003] In the prior art, a treatment device is usually used for the purification of waste gas. Common waste gas treatment devices generally remove dust from the waste gas by spraying water, so harmful substances in the waste gas cannot be purified. The unpurified waste gas is directly discharged into the atmosphere, polluting the environment, and is very likely to endanger the health and safety of surrounding workers, which is not conducive to the use of workers. Utility Model Content

[0004] The purpose of the utility model is to provide an exhaust gas purification device for a steel smelting furnace to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an exhaust gas purification device for a steel smelting furnace, comprising a smoke hood, a smoke inlet pipe A, a smoke inlet pipe B, an induced draft fan, a primary filter, a spray tower, a smoke drying box and a filter module, wherein the spray tower, the smoke drying box and the filter module are arranged along the smoke output direction, the smoke inlet pipe B is connected to the inlet on the upper side of the spray tower, and the induced draft fan is arranged at the end of the smoke inlet pipe B; the air inlet side of the induced draft fan is connected to the primary filter through a flange, the primary filter is connected to the smoke inlet pipe A, a smoke hood is arranged at the end of the smoke inlet pipe A, the smoke hood is connected to the smoke outlet of the smelting furnace, and a diverter frame for diverting smoke impact is arranged in the smoke hood; a spray chamber is arranged in the spray tower, and the spray chamber is divided into a primary spray chamber, a secondary spray chamber and an air outlet chamber from top to bottom by partitions, wherein a water spray pipe and a reagent spray pipe are respectively arranged in the primary spray chamber and the secondary spray chamber.

[0006] Preferably, the volume of the air outlet cavity is larger than the volume of the primary spray cavity and the secondary spray cavity, the outlet side of the air outlet cavity is connected to the smoke exhaust pipe A, and the end of the smoke exhaust pipe A is connected to the smoke drying box.

[0007] Preferably, the flue gas drying box is in the shape of a cylindrical tank, and a spiral flue gas heating pipe is arranged along the inner wall of the flue gas drying box, and the lower side of the flue gas drying box is connected to the flue gas exhaust pipe B.

[0008] Preferably, the end of the flue gas exhaust pipe B is connected to a filter module, and the filter module is installed on the frame through angle irons. The filter module includes an activated carbon adsorption unit, a silica gel adsorption unit, and a carbon fiber adsorption unit from top to bottom.

[0009] Preferably, the smoke inlet pipe A and the smoke inlet pipe B are both arranged vertically, and a climbing hole for maintenance is provided between the smoke inlet pipe A and the smoke inlet pipe B.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] The spray tower, flue gas drying box and filter module of the utility model are arranged in series along the flue gas output direction, and the high-speed flue gas is collected by the smoke collecting hood. The high-speed flue gas is dispersed by the diverter frame inside the smoke collecting hood, and the flue gas enters the spray tower from the flue gas inlet pipe A through the primary filter and the flue gas inlet pipe B. The primary filter can intercept large particles of impurities in the flue gas. The primary filter is installed with a flange, which is convenient for disassembly and cleaning. The flue gas entering the spray tower is successively subjected to the water spray dust removal and the chemical agent removal process, and then gathered in the air outlet cavity, and discharged from the flue gas exhaust pipe A to the flue gas drying box for drying. The purpose of setting the flue gas drying box is to reduce the moisture in the flue gas to avoid the subsequent physical adsorption causing moisture inactivation of the adsorption material. The flue gas treated by the flue gas drying box is finally discharged outdoors after being adsorbed by activated carbon, silica gel, carbon fiber, etc. The entire purification device of the utility model has strong connectivity, can realize continuous treatment of waste gas, and has high treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0014] In the figure: 1. Smoke hood; 2. Smoke inlet pipe A; 3. Smoke inlet pipe B; 4. induced draft fan; 5. Primary filter; 6. Spray tower; 7. Smoke drying box; 8. Filter module; 801. Activated carbon adsorption unit; 802. Silica gel adsorption unit; 803. Carbon fiber adsorption unit; 9. Water spray pipe; 10. Smoke exhaust pipe A; 11. Smoke exhaust pipe B; 12. Ladder. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0017] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] See also Figure 1-2 The utility model provides a technical solution: an exhaust gas purification device for a steel smelting furnace, comprising a smoke collecting hood 1, a smoke inlet pipe A2, a smoke inlet pipe B3, an induced draft fan 4, a primary filter 5, a spray tower 6, a smoke drying box 7 and a filter module 8, wherein the spray tower 6, the smoke drying box 7 and the filter module 8 are arranged along the smoke output direction, the upper inlet of the spray tower 6 is connected to the smoke inlet pipe B3, and the induced draft fan 4 is arranged at the end of the smoke inlet pipe B3; the air inlet side of the induced draft fan 4 is vented A primary filter 5 is connected through a flange, and a flue gas inlet pipe A2 is connected to the primary filter 5. A smoke collecting hood 1 is arranged at the end of the smoke inlet pipe A2. The smoke collecting hood 1 is connected to the smoke outlet of the smelting furnace, and a diverter rack for diverting the flue gas impact is arranged in the smoke collecting hood 1; a spray chamber is arranged in the spray tower 6, and the spray chamber is divided into a primary spray chamber, a secondary spray chamber and an air outlet chamber from top to bottom by partitions, wherein a water spray pipe 9 and a reagent spray pipe are respectively arranged in the primary spray chamber and the secondary spray chamber.

[0019] In this embodiment, the volume of the air outlet cavity is greater than the volume of the primary spray cavity and the secondary spray cavity. The outlet side of the air outlet cavity is connected to the smoke exhaust pipe A10, and the end of the smoke exhaust pipe A10 is connected to the smoke drying box 7.

[0020] In this embodiment, the flue gas drying box 7 is in the shape of a cylindrical tank, and a spiral flue gas heating pipe is arranged along the inner wall of the flue gas drying box 7 . The lower side of the flue gas drying box 7 is connected to the flue gas exhaust pipe B11 .

[0021] In this embodiment, the end of the flue gas exhaust pipe B11 is connected to the filter module 8, and the filter module 8 is installed on the frame through angle irons. The filter module 8 includes an activated carbon adsorption unit 801, a silica gel adsorption unit 802, and a carbon fiber adsorption unit 803 from top to bottom.

[0022] In this embodiment, the smoke inlet pipe A2 and the smoke inlet pipe B3 are both arranged vertically, and a ladder 12 for maintenance is provided between the smoke inlet pipe A2 and the smoke inlet pipe B3.

[0023] In this embodiment, the spray tower 6, the flue gas drying box 7 and the filter module 8 are arranged in series along the flue gas output direction, and the high-speed flue gas is collected by the smoke collecting hood 1. The high-speed flue gas is dispersed by the diverter frame inside the smoke collecting hood 1, and the flue gas enters the spray tower 6 through the flue gas inlet pipe A2, the primary filter 5 and the flue gas inlet pipe B3. The primary filter 5 can intercept large particles of impurities in the flue gas. The primary filter 5 is installed with a flange, which is convenient for disassembly and cleaning. The flue gas entering the spray tower 6 is successively subjected to the water spray dust removal and the chemical agent removal process, and then gathered in the air outlet cavity, and discharged to the flue gas drying box 7 by the flue gas exhaust pipe A10 for drying. The purpose of setting the flue gas drying box 7 is to reduce the moisture in the flue gas to avoid the subsequent physical adsorption causing moisture inactivation of the adsorption material. The flue gas treated by the flue gas drying box 7 is finally adsorbed by activated carbon, silica gel, carbon fiber, etc. and discharged outdoors. The whole purification device has strong connectivity, can achieve continuous treatment of waste gas, and has high treatment efficiency.

[0024] It is worth noting that the entire device is controlled by a main control button. Since the device matched with the control button is a common device and belongs to the existing mature technology, its electrical connection relationship and specific circuit structure will not be described in detail here.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exhaust gas purification device for a steel smelting furnace, characterized in that: The invention comprises a smoke collecting hood (1), a smoke inlet pipe A (2), a smoke inlet pipe B (3), an induced draft fan (4), a primary filter (5), a spray tower (6), a smoke drying box (7) and a filter module (8), wherein the spray tower (6), the smoke drying box (7) and the filter module (8) are arranged along the smoke output direction, the smoke inlet pipe B (3) is connected to the upper inlet of the spray tower (6), and the induced draft fan (4) is arranged at the end of the smoke inlet pipe B (3); the air inlet side of the induced draft fan (4) is connected to the primary filter via a flange. The primary filter (5) is connected to a flue gas inlet pipe A (2), a smoke collecting hood (1) is arranged at the end of the smoke inlet pipe A (2), the smoke collecting hood (1) is connected to the smoke outlet of the smelting furnace, and a diverter frame for diverting the flue gas impact is arranged in the smoke collecting hood (1); a spray chamber is arranged in the spray tower (6), and the spray chamber is divided into a primary spray chamber, a secondary spray chamber and an air outlet chamber from top to bottom by a partition, wherein a water spray pipe (9) and a reagent spray pipe are respectively arranged in the primary spray chamber and the secondary spray chamber.

2. The exhaust gas purification equipment for a steel smelting furnace according to claim 1, characterized in that: The volume of the air outlet cavity is greater than the volume of the primary spray cavity and the secondary spray cavity, the outlet side of the air outlet cavity is connected to a smoke exhaust pipe A (10), and the end of the smoke exhaust pipe A (10) is connected to a smoke drying box (7).

3. The exhaust gas purification equipment for a steel smelting furnace according to claim 2, characterized in that: The flue gas drying box (7) is in the shape of a cylindrical tank. A spiral flue gas heating pipe is arranged along the inner wall of the flue gas drying box (7). The lower side of the flue gas drying box (7) is connected to a flue gas exhaust pipe B (11).

4. The exhaust gas purification equipment for a steel smelting furnace according to claim 3, characterized in that: The end of the flue gas exhaust pipe B (11) is connected to a filter module (8), and the filter module (8) is mounted on the frame via angle irons. The filter module (8) comprises, from top to bottom, an activated carbon adsorption unit (801), a silica gel adsorption unit (802), and a carbon fiber adsorption unit (803).

5. The exhaust gas purification equipment for a steel smelting furnace according to claim 1, characterized in that: The smoke inlet pipe A (2) and the smoke inlet pipe B (3) are both arranged vertically, and a ladder (12) for maintenance is provided between the smoke inlet pipe A (2) and the smoke inlet pipe B (3).

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