Roasting tail gas adsorption and filtration device

Abstract

The utility model discloses a roasting tail gas adsorption and filtration device which comprises a layered adsorption tank, a tail gas guide assembly and a tail gas spraying assembly, wherein the tail gas guide assembly and the tail gas spraying assembly are respectively fixed on the side wall of the layered adsorption tank; the layered adsorption tank comprises a tank body, three meshes fixed in an inner cavity of the tank body at equal intervals and a plurality of meshes formed in an adsorption mesh plate, and the meshes are filled with adsorption cotton. Roasting tail gas is conveyed into the layered adsorption tank through the tail gas guide assembly, multi-batch tail gas emission is achieved through three groups of manifolds on a pipe fitting, and tail gas accumulation in a bottom layer space is avoided; the tail gas penetrates through the adsorption net plate soaked by the ammonia water under the action of air pressure, so that the tail gas reacts with the ammonia water in the adsorption cotton to realize preliminary filtration, and the situation that part of the tail gas escapes is avoided; the tail gas passing through the adsorption screen plate is sprayed by ammonia water in the tail gas spraying assembly in the inner cavity, and the ammonia water and the tail gas in the inner cavity fully react to further purify the tail gas.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas adsorption and filtering equipment, in particular to a roasting tail gas adsorption and filtering device. Background Art

[0002] As an important industrial equipment, roasting furnace is widely used in ore smelting, steel production and other industries. However, the tail gas produced by the roasting furnace contains a large amount of harmful substances, mainly sulfur dioxide, nitrogen oxides, particulate matter and other harmful substances. Among them, sulfur dioxide is one of the most important pollutants in the tail gas of the roasting furnace, which is very harmful to the atmospheric environment and human health. Therefore, the key to the treatment of the tail gas of the roasting furnace is to effectively remove sulfur dioxide.

[0003] The physical method mainly removes harmful substances from tail gas by absorption, adsorption, filtration and other methods. By contacting the tail gas with an absorbent, the absorbent is used to absorb the harmful substances by its affinity for the harmful substances. Commonly used absorbents include ammonia water, alkali solution and the like. At present, the treatment of tail gas is usually to transport the tail gas to a scrubber and spray ammonia water or alkali solution inside the scrubber. However, in practical applications, most scrubbers are set as single-layer, that is, ammonia water or alkali solution is sprayed inside the tower by a nozzle. In addition to the poor filtering effect, the single-layer scrubber is also subject to the spray range limitation of the nozzle, and a small amount of tail gas will escape from the spray blind area. In order to solve this technical problem, those skilled in the art have gradually developed multi-layer scrubbers, and the tail gas passes through the multi-layer scrubbers from the bottom of the scrubber in turn. Although this solves the problem of poor filtering effect, such a filtering method also causes the tail gas to be blocked by multiple layers of fillers and accumulate on the bottom layer of the tower, causing tail gas accumulation in the bottom space, slowing down the filtering speed, and there is also the phenomenon of tail gas reflux. Utility Model Content

[0004] The utility model aims to provide a roasting tail gas adsorption and filtering device to solve the problems raised in the background technology in view of the shortcomings of the prior art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A roasting tail gas adsorption and filtration device comprises a layered adsorption tank, a tail gas guide assembly fixed to the left bottom side wall of the layered adsorption tank, and a tail gas spray assembly arranged on the right side wall of the layered adsorption tank;

[0007] The layered adsorption tank includes a tank body, three adsorption mesh plates fixed in the tank body cavity at equal distances, and a plurality of mesh holes opened inside the adsorption mesh plates, and the inside of the mesh holes are filled with adsorption cotton;

[0008] The exhaust gas guiding assembly includes a blower, an air intake end of the blower is connected to an air intake pipe, an exhaust end of the blower is connected to an exhaust pipe penetrating into the inner cavity of the tank body, and one end of the exhaust pipe located in the inner cavity of the tank body is fixedly connected to a bent pipe, and three sets of manifolds are penetrated on the side wall of the bent pipe;

[0009] The exhaust gas spray assembly includes a water pump, and the output end of the water pump is connected to a delivery pipe. Three groups of conduits are fixed on the side wall of the delivery pipe, which penetrate into the inner cavity of the tank and are located above the adsorption mesh plate, and the ends of the conduits are connected to spray heads.

[0010] As a preferred solution of the roasting tail gas adsorption and filtration device, the adsorption mesh plates are arranged in the inner cavity of the tank body at equal distances, and the inner cavity of the tank body is divided into three parts at equal distances.

[0011] As a preferred solution of the roasting tail gas adsorption and filtration device, one end of the air inlet pipe away from the blower is connected to the tail gas discharge port of the roasting reactor.

[0012] As a preferred solution of the roasting tail gas adsorption and filtering device, a circular hole for the exhaust pipe to pass through is opened on the left side wall of the tank body, and a sealing gasket is arranged inside the circular hole.

[0013] As a preferred solution for the roasting exhaust gas adsorption and filtration device, the bend is arranged vertically in the inner cavity of the tank body, and the three groups of manifolds on the side wall of the bend are respectively located in the upper, middle and lower parts of the inner cavity of the tank body and are arranged below the adsorption mesh plate.

[0014] As a preferred solution of the roasting tail gas adsorption and filtration device, a circular hole for the elbow to pass through is opened at the central position of the inner part of the adsorption mesh plate.

[0015] As a preferred solution of the roasting tail gas adsorption and filtration device, three through holes for the conduit to pass through are evenly spaced on the right side wall of the tank body, and one end of the conduit located in the tank body cavity is located above the adsorption mesh plate.

[0016] As a preferred solution of the roasting tail gas adsorption and filtration device, the liquid inlet end of the water pump is connected to a water inlet pipe, and the end of the water inlet pipe away from the water pump is connected to an ammonia water tank.

[0017] Beneficial effects of the utility model:

[0018] The utility model uses an exhaust gas guide component composed of a blower and pipe fittings to transport the roasting exhaust gas to the interior of a layered adsorption tank. On the basis of the tank body being divided into three parts by an adsorption mesh plate, three groups of manifolds on the pipe fittings can discharge the exhaust gas in multiple batches, thereby avoiding the accumulation of exhaust gas in the bottom space and improving the filtration efficiency. The exhaust gas needs to pass through the adsorption mesh plate soaked with ammonia water under the action of air pressure, so that the exhaust gas and the ammonia water in the adsorption cotton can be initially reacted to achieve initial adsorption and filtration, while avoiding the situation where part of the exhaust gas escapes from the blind area. At the same time, the exhaust gas after passing through the adsorption mesh plate will be sprayed with ammonia water in the exhaust gas spray component in the inner cavity, and the ammonia water will fully adsorb and react with the exhaust gas in the inner cavity to further purify it, and the purified exhaust gas will be discharged from the port on the top of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for use in the embodiments of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can also be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the roasting tail gas adsorption and filtering device described in the utility model.

[0021] Figure 2 It is a schematic diagram of the cutaway structure of the layered adsorption tank described in the utility model.

[0022] Figure 3 It is a structural schematic diagram of the exhaust gas guiding assembly described in the utility model.

[0023] Figure 4 It is a structural schematic diagram of the tail gas spray assembly described in the utility model.

[0024] In the figure:

[0025] 1. Layered adsorption tank; 11. Tank body; 2. Exhaust guide assembly; 21. Blower; 22. Exhaust pipe; 23. Intake pipe; 24. Elbow pipe; 25. Manifold; 3. Exhaust spray assembly; 31. Water pump; 32. Delivery pipe; 33. Water inlet pipe; 34. Conduit; 4. Adsorption mesh; 5. Mesh. DETAILED DESCRIPTION

[0026] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0027] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0028] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0029] In the description of the present invention, unless otherwise clearly specified and limited, if the term "connection" or the like appears to indicate the connection relationship between components, the term 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 an indirect connection through an intermediate medium, it can be the internal connection of two components or the interaction relationship between 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.

[0030] like Figure 1 As shown, the utility model provides a roasting exhaust gas adsorption and filtration device, including a layered adsorption tank 1, an exhaust gas guide component 2 fixed to the left bottom side wall of the layered adsorption tank 1, and an exhaust gas spray component 3 arranged on the right side wall of the layered adsorption tank 1.

[0031] like Figure 2 As shown, the layered adsorption tank 1 of this embodiment specifically includes a tank body 11 and three adsorption mesh plates 4 fixed at equal distances in the inner cavity of the tank body 11. The adsorption mesh plates 4 divide the inner cavity of the tank body 11 into three parts at equal distances. A plurality of mesh holes 5 are opened inside the adsorption mesh plates 4, and the inside of the mesh holes 5 are filled with adsorption cotton.

[0032] like Figure 3As shown, the exhaust gas guiding assembly 2 of the present embodiment specifically includes a blower 21, an air inlet end of the blower 21 is connected to an air inlet pipe 23, one end of the air inlet pipe 23 away from the blower 21 is connected to the exhaust gas discharge port of the roasting reactor, and the exhaust end of the blower 21 is connected to an exhaust pipe 22 that penetrates into the inner cavity of the tank body 11, a circular hole for the exhaust pipe 22 to penetrate is provided on the left side wall of the tank body 11, and a sealing gasket is provided inside the circular hole; one end of the exhaust pipe 22 located in the inner cavity of the tank body 11 is fixedly connected to a bend pipe 24, the bend pipe 24 is arranged in a vertical state in the inner cavity of the tank body 11, and a circular hole for the bend pipe 24 to penetrate is provided in the central position of the inner cavity of the adsorption mesh plate 4, three groups of manifolds 25 are penetrated on the side wall of the bend pipe 24, and the three groups of manifolds 25 are respectively located in the upper, middle and lower parts of the inner cavity of the tank body 11, and are arranged below the adsorption mesh plate 4, and the exhaust gas will pass through the adsorption mesh plate 4 after being discharged from the manifold 25.

[0033] like Figure 4 As shown, the exhaust gas spray assembly 3 of this embodiment specifically includes a water pump 31, and the output end of the water pump 31 is connected to a delivery pipe 32, and three groups of conduits 34 are fixed on the side wall of the delivery pipe 32, which penetrate into the inner cavity of the tank body 11 and are located above the adsorption mesh plate 4, and three through holes for the conduits 34 to penetrate are evenly spaced on the right side wall of the tank body 11, and one end of the conduit 34 located in the inner cavity of the tank body 11 is located above the adsorption mesh plate 4, and the end of the conduit 34 is connected to a nozzle, and the liquid inlet end of the water pump 31 is connected to a water inlet pipe 33, and the end of the water inlet pipe 33 away from the water pump 31 is connected to the ammonia water tank.

[0034] According to the above-mentioned preferred technical solution, the workflow of the technical solution is described as follows:

[0035] After the exhaust gas discharge end of the roasting reactor is connected to the air inlet pipe 23, the exhaust gas is transported to the inside of the elbow 24 through the blower 21. After the exhaust gas is diverted to the inside of the manifold 25 by the elbow 24, the exhaust gas enters the upper, middle and lower parts of the tank body 11 in sequence, thereby avoiding the accumulation of exhaust gas in the bottom space and improving the filtration efficiency; at the same time, the water pump 31 cooperates with the water inlet pipe 33 and the delivery pipe 32 to spray the ammonia solution to the three parts of the inner cavity of the tank body 11, and the ammonia solution will penetrate the adsorption cotton inside the mesh 5; and when the blower 21 After the exhaust gas is continuously transported, the exhaust gas will be forced to pass through the adsorption cotton containing ammonia water inside the mesh 5 due to the influence of air pressure, so that the exhaust gas reacts with the ammonia water to achieve preliminary adsorption filtration, while avoiding the situation where part of the exhaust gas escapes from the blind spot. Then, the exhaust gas passes through the adsorption mesh plate 4 and enters the inner cavity of the second part, and is sprayed with ammonia water in the exhaust gas spray assembly 3 in the cavity of the second part. The ammonia water and the exhaust gas in the inner cavity undergo sufficient adsorption reaction to further purify it, and the purified exhaust gas will be discharged from the port on the top of the tank body 11.

[0036] It should be noted that the above specific implementations are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art should understand that various modifications, equivalent substitutions, changes, etc. can be made to the present invention. However, as long as these changes do not deviate from the spirit of the present invention, they should be within the scope of protection of the present invention. In addition, some terms used in the specification and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A roasting tail gas adsorption and filtration device, characterized in that: It comprises a stratified adsorption tank (1), an exhaust gas guide assembly (2) fixed to the left bottom side wall of the stratified adsorption tank (1), and an exhaust gas spray assembly (3) arranged on the right side wall of the stratified adsorption tank (1); The layered adsorption tank (1) comprises a tank body (11), three adsorption mesh plates (4) fixed at equal distances in the inner cavity of the tank body (11), and a plurality of mesh holes (5) provided inside the adsorption mesh plates (4), wherein the inside of the mesh holes (5) are filled with adsorption cotton; The exhaust gas guiding assembly (2) comprises a blower (21), an air intake end of the blower (21) is connected to an air intake pipe (23), an exhaust end of the blower (21) is connected to an exhaust pipe (22) penetrating into the inner cavity of the tank body (11), and one end of the exhaust pipe (22) located in the inner cavity of the tank body (11) is fixedly connected to a bent pipe (24), and three groups of manifolds (25) are provided on the side wall of the bent pipe (24); The exhaust gas spray assembly (3) includes a water pump (31), and the output end of the water pump (31) is connected to a delivery pipe (32), and three groups of conduits (34) are fixed on the side wall of the delivery pipe (32) and penetrate the inner cavity of the tank body (11) and are located above the adsorption mesh plate (4), and the ends of the conduits (34) are connected to spray heads.

2. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: The adsorption mesh plates (4) are arranged at equal distances in the inner cavity of the tank body (11), and divide the inner cavity of the tank body (11) into three parts at equal distances.

3. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: One end of the air inlet pipe (23) away from the blower (21) is connected to the tail gas discharge port of the roasting reactor.

4. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: The left side wall of the tank body (11) is provided with a circular hole for the exhaust pipe (22) to pass through, and a sealing gasket is arranged inside the circular hole.

5. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: The curved pipe (24) is arranged in a vertical state in the inner cavity of the tank body (11), and the three groups of manifolds (25) on the side wall of the curved pipe (24) are respectively located in the upper, middle and lower parts of the inner cavity of the tank body (11), and are arranged below the adsorption mesh plate (4).

6. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: A circular hole for the curved pipe (24) to pass through is provided at the central position of the interior of the adsorption mesh plate (4).

7. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: Three through holes for the conduit (34) to pass through are evenly spaced on the right side wall of the tank body (11), and one end of the conduit (34) located in the inner cavity of the tank body (11) is located above the adsorption mesh plate (4).

8. The roasting tail gas adsorption and filtration device according to claim 1, characterized in that: The liquid inlet end of the water pump (31) is connected to a water inlet pipe (33), and one end of the water inlet pipe (33) away from the water pump (31) is connected to an ammonia water tank.

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