Water curtain dust removal device of sintering mixer

Abstract

The utility model discloses a water curtain dust removal device of a sintering mixer. The water curtain dust removal device is arranged above the sintering mixer and is close to a discharge hole of the sintering mixer; a dust removal channel is mounted at a dust discharge port of the sintering mixer; a first-stage spray pipe, a second-stage spray pipe, a third-stage spray pipe, a fourth-stage spray pipe and a fifth-stage spray pipe are sequentially arranged in the dust removal channel from bottom to top, and a plurality of spray nozzles are respectively mounted on each stage of spray pipe; a demister is arranged between every two stages of spraying pipes in the dust removal channel; a first-stage pore plate is mounted between the first-stage spraying pipe and the first-stage demister in the dust removal channel; and a second-stage pore plate is mounted at the outlet end in the dust removal channel. The device is convenient to transform and install on the basis of original equipment, does not occupy extra field space, and is convenient to install and use. The device is reasonable in structural design, small in system operation resistance and low in manufacturing cost, and the concentration of discharged dust can be effectively controlled to be about 5 mg / Nm < 3 >.

Description

Technical Field

[0001] The utility model belongs to the technical field of dust removal equipment, and in particular relates to a water curtain dust removal device for a sintering mixer. Background Art

[0002] Driven by the national "ultra-low emission" related policies, the particle emission requirements of various industries such as metallurgy, building materials, electricity, chemicals, breeding, and food are constantly being improved and changed. In many industries, bag dust collectors, as important equipment for atmospheric environmental governance, are suitable for capturing fine, dry, non-fibrous dust. However, when facing special working conditions such as high temperature, water content, viscosity, strong acid and alkali, bag dust collectors have certain limitations. For example, during the operation of the mixer supporting the sintering machine in the steel industry, a large amount of dust will be generated. The working conditions are high dust, high temperature, and high water content of smoke. Ordinary dust removal processes have certain limitations. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a water curtain dust removal device for a sintering mixer which is easy to install, occupies a small space, has a small running resistance and can ensure that the high-temperature, high-dust and high-water-content flue gas meets the emission standards.

[0004] To achieve the above purpose, the technical solution of the utility model is: a water curtain dust removal device for a sintering mixer is installed above the sintering mixer and close to the discharge port of the sintering mixer; a dust discharge port is opened on the upper wall of the casing of the sintering mixer near the discharge port of the sintering mixer, and a vertically arranged dust removal channel is installed at the dust discharge port;

[0005] The dust removal channel is provided with a primary spray pipe, a secondary spray pipe, a tertiary spray pipe, a quaternary spray pipe and a quintuple spray pipe from bottom to top, and a plurality of spray nozzles are installed on each spray pipe respectively; a circulating water pump is installed outside the dust removal channel, the drain outlet of the circulating water pump is connected to the spray pipes at each level, and the water inlet of the circulating water pump is connected to the circulating water tank;

[0006] A first-level demister is installed between the first-level spray pipe and the second-level spray pipe in the dust removal channel, a second-level demister is installed between the second-level spray pipe and the third-level spray pipe in the dust removal channel, a third-level demister is installed between the third-level spray pipe and the fourth-level spray pipe in the dust removal channel, and a fourth-level demister is installed between the fourth-level spray pipe and the fifth-level spray pipe in the dust removal channel;

[0007] A primary orifice plate is installed in the dust removal channel between the primary spray pipe and the primary demister, a secondary orifice plate is installed at the outlet end of the dust removal channel, the outlet end of the dust removal channel is connected to the chimney, and an axial flow fan is installed in the exhaust channel of the chimney.

[0008] As a preferred technical solution, the aperture of the primary orifice plate is larger than the aperture of the secondary orifice plate.

[0009] As a preferred technical solution, the aperture of the primary orifice plate is 80 to 120 mm.

[0010] As a preferred technical solution, the aperture of the secondary orifice plate is 60 mm.

[0011] As a preferred technical solution, a filter screen is provided on the upper surface of the secondary orifice plate.

[0012] As a preferred technical solution, a detection platform is installed outside the dust removal channel.

[0013] As a preferred technical solution, the detection platform includes a bottom-level detection platform, a middle-level detection platform and a high-level detection platform.

[0014] As a preferred technical solution, the circulating water pump and circulating water tank are installed on the bottom detection platform.

[0015] Due to the adoption of the above technical solution, the utility model has at least the following beneficial effects:

[0016] (1) The device is installed above the sintering mixer and near the discharge port of the sintering mixer. A dust exhaust port is opened on the upper wall of the casing of the sintering mixer near the discharge port of the sintering mixer, and a vertical dust removal channel is installed at the dust exhaust port. This makes it easy to modify and install the original equipment on the one hand, and does not occupy additional site space on the other hand, making it easy to install and use.

[0017] (2) The first-level orifice plate is used to block large particles in the dust, and the five-level atomization spray + four-level demister are used for efficient dust removal. The second-level orifice plate and filter are used for ultimate dust reduction at the end of the discharge. The combination of orifice plate, atomization spray and demister can effectively solve the problem of high dust, high temperature and high humidity smoke generated during the operation of the sintering mixer. Not only can the dust concentration of the emission be effectively controlled within 5mg / Nm 3 The system runs stably and fully reduces the system running resistance, the structural design is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only intended to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0019] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the dust removal channel in the embodiment of the utility model;

[0021] Figure 3 It is a structural schematic diagram of the secondary orifice plate and the filter screen in the embodiment of the utility model. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Needless to say, those skilled in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and descriptions are illustrative in nature and are not intended to limit the scope of protection of the claims.

[0023] like Figure 1 As shown, the water curtain dust removal device of the sintering mixer is installed above the sintering mixer 1 and close to the discharge port 2 of the sintering mixer 1; a dust outlet 3 is provided on the upper wall of the casing of the sintering mixer 1 close to the discharge port 2 of the sintering mixer, and a vertically arranged dust removal channel 4 is installed at the dust outlet 3; this is convenient for modification and installation based on the original equipment on the one hand, and on the other hand, it does not occupy additional site space and is easy to install and use.

[0024] refer to Figure 2 The dust removal channel 4 is provided with a primary spray pipe 5, a secondary spray pipe 6, a tertiary spray pipe 7, a quaternary spray pipe 8 and a quintuple spray pipe 9 from bottom to top, and a plurality of spray nozzles 10 are respectively installed on each level of the spray pipe; a circulating water pump 11 is installed outside the dust removal channel 4, the drain outlet of the circulating water pump 11 is connected to the spray pipes at each level, and the water inlet of the circulating water pump 11 is connected to the circulating water tank 12;

[0025] In the dust removal passage 4, a first-level demister 13 is installed between the first-level spray pipe 5 and the second-level spray pipe 6, a second-level demister 14 is installed between the second-level spray pipe 6 and the third-level spray pipe 7, a third-level demister 15 is installed between the third-level spray pipe 7 and the fourth-level spray pipe 8, and a fourth-level demister 16 is installed between the fourth-level spray pipe 8 and the fifth-level spray pipe 9; the demisters at each level are preferably corrugated plate demisters.

[0026] A primary orifice plate 17 is installed in the dust removal passage 4 between the primary spray pipe 5 and the primary demister 13, and a secondary orifice plate 18 is installed in the dust removal passage 4 at the outlet end. Figure 3, the upper surface of the secondary orifice plate 18 is provided with a PTFE (polytetrafluoroethylene) filter 20, which can be cleaned and replaced. The combination of the orifice plate and the filter can effectively avoid the problem of filter blockage and extend the service life of the filter, and can fully filter the fine and non-fibrous dust in the dust to ensure that the emission meets the standard; wherein, the aperture of the primary orifice plate 17 is larger than the aperture of the secondary orifice plate 18. The aperture of the primary orifice plate is preferably 80-120 mm, and the aperture of the secondary orifice plate is preferably 60 mm. The aperture of the orifice plate is set within the above range, which can effectively reduce the system operation resistance while playing a role in efficient dust removal. The outlet end of the dust removal channel 4 is connected to the chimney 19, and an axial flow fan 24 is installed in the exhaust channel of the chimney 19. In order to reduce the system resistance and ensure the flue gas flow rate, the dust removal channel 4 is set to be necked from the end away from the chimney 19 to the end close to the chimney 19.

[0027] Refer to Figure 1 A detection platform is installed outside the dust removal channel 4. The detection platform is arranged in layers, including a bottom detection platform 21, a middle detection platform 22 and a high detection platform 23. This makes it convenient for workers to detect dust concentrations at different heights, so as to overhaul, maintain and process the equipment. For easy installation and use, the circulating water pump 11 and the circulating water tank 12 are both installed on the bottom detection platform 21.

[0028] The working principle of the utility model is as follows: when the sintering mixer 1 is working, the smoke enters the dust removal channel 4 under the gravitational effect of the axial flow fan 24, and the dusty smoke first passes through the primary orifice plate 17. Under the blocking of the primary orifice plate 17, large particles in the dust fall, which can prevent large particles from entering the upper demister. The smoke that continues to rise is cooled and dusted by the five-stage atomization spray + the fourth-stage demister, and then passes through the secondary orifice plate 18 and the filter 20 for the ultimate dust reduction at the end of the discharge, enters the chimney 19 through the axial flow fan 24, and finally discharged into the atmosphere. In this way, not only the emission dust concentration can be effectively controlled at 5mg / Nm 3 The system runs stably and fully reduces the system running resistance, the structural design is simple and the manufacturing cost is low.

[0029] The above description is only an illustrative embodiment of the present invention and is not intended to limit the scope of the present invention. Any equivalent changes and modifications made by any person skilled in the art without departing from the concept and principle of the present invention shall fall within the scope of protection of the present invention.

Claims

1. The water curtain dust removal device for sintering mixer is installed above the sintering mixer and close to the discharge port of the sintering mixer; it is characterized by: A dust discharge port is provided on the upper wall of the casing of the sintering mixer near the discharge port of the sintering mixer, and a vertically arranged dust removal channel is installed at the dust discharge port; The dust removal channel is provided with a primary spray pipe, a secondary spray pipe, a tertiary spray pipe, a quaternary spray pipe and a quintuple spray pipe from bottom to top, and a plurality of spray nozzles are installed on each spray pipe respectively; a circulating water pump is installed outside the dust removal channel, the drain outlet of the circulating water pump is connected to the spray pipes at each level, and the water inlet of the circulating water pump is connected to the circulating water tank; A first-level demister is installed between the first-level spray pipe and the second-level spray pipe in the dust removal channel, a second-level demister is installed between the second-level spray pipe and the third-level spray pipe in the dust removal channel, a third-level demister is installed between the third-level spray pipe and the fourth-level spray pipe in the dust removal channel, and a fourth-level demister is installed between the fourth-level spray pipe and the fifth-level spray pipe in the dust removal channel; A primary orifice plate is installed in the dust removal channel between the primary spray pipe and the primary demister, a secondary orifice plate is installed at the outlet end of the dust removal channel, the outlet end of the dust removal channel is connected to the chimney, and an axial flow fan is installed in the exhaust channel of the chimney.

2. The water curtain dust removal device for a sintering mixer according to claim 1, characterized in that: The aperture of the primary orifice plate is larger than the aperture of the secondary orifice plate.

3. The water curtain dust removal device for a sintering mixer according to claim 2, characterized in that: The aperture of the primary orifice plate is 80-120 mm.

4. The water curtain dust removal device for a sintering mixer according to claim 3, characterized in that: The aperture of the secondary orifice plate is 60 mm.

5. The water curtain dust removal device for a sintering mixer according to claim 1, characterized in that: A filter screen is arranged on the upper surface of the secondary orifice plate.

6. The water curtain dust removal device for a sintering mixer according to claim 1, characterized in that: A detection platform is installed outside the dust removal channel.

7. The water curtain dust removal device for a sintering mixer according to claim 6, characterized in that: The detection platform includes a bottom-level detection platform, a middle-level detection platform and a high-level detection platform.

8. The water curtain dust removal device for a sintering mixer according to claim 7, characterized in that: The circulating water pump and the circulating water tank are installed on the bottom detection platform.

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