Dust removal device of circulating fluidized bed

Abstract

The utility model provides a circulating fluidized bed dust removal device which comprises a fluidized bed main body, the cyclone separator is connected with an exhaust pipeline of the fluidized bed main body, a first separation outlet and a second separation outlet are formed in the cyclone separator, and the second separation outlet is connected with a storage part, so that first powder which is discharged through the exhaust pipeline, separated by the cyclone separator and has the particle size of a first preset value is collected in the storage part; the dust removal structure is connected with the first separation outlet, the dust removal structure comprises a shell body with a containing cavity and a plurality of spraying components arranged in the containing cavity, and the multiple spraying components are used for spraying water into the containing cavity to form a water curtain; the particle size of the second powder is a second preset value, and the second powder flows into the containing cavity through the first separation outlet, so that the problems that in the prior art, in the production process of a circulating fluidized bed, light-particle materials are likely to be lost, dust pollution and loss are caused, and the drying efficiency of a drying tower is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying towers, and more specifically, to a circulating fluidized bed dust removal device. Background Art

[0002] An external fluidized bed of a drying tower is a device for drying materials. It combines the characteristics of a drying tower and a fluidized bed, and has been innovated and improved on the basis of traditional drying equipment. An external fluidized bed of a drying tower is provided with a drying tower inside the fluidized bed. The materials are sent into the fluidized bed for drying, and then are subjected to secondary drying by hot air in the drying tower, thereby improving the drying efficiency and drying quality. Among them, the fluidized bed technology is a technology in which particulate materials are in a fluidized state in the bed by gas, which can effectively increase the contact area between the materials and the gas and accelerate the drying speed of the materials. The drying technology is to heat air or gas, send it into the drying equipment to contact with the materials, and evaporate the moisture in the materials to achieve the purpose of drying.

[0003] However, in the prior art, the common external fluidized bed of a drying tower needs to use 4 blowers to cool the materials through a screen plate during production. During the blowing process of the blowers, it is easy for the materials with lighter particles to be blown out of the fluidized bed through the exhaust pipe, resulting in dust pollution and loss of materials, and at the same time affecting the drying efficiency of the drying tower. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a circulating fluidized bed dust removal device to solve the problems in the prior art that in the production process of the circulating fluidized bed, it is easy for the materials with lighter particles to be lost, resulting in dust pollution and loss, and affecting the drying efficiency of the drying tower.

[0005] To achieve the above purpose, the utility model provides a circulating fluidized bed dust removal device, including: a fluidized bed main body; a cyclone separator connected to the exhaust pipe of the fluidized bed main body. The cyclone separator is provided with a first separation outlet and a second separation outlet. The second separation outlet is connected with a storage component, so that the first powder with a particle size of a first preset value discharged through the exhaust pipe and separated by the cyclone separator is collected in the storage component; a dust removal structure connected to the first separation outlet. The dust removal structure includes a shell main body with an accommodation cavity and a plurality of spraying components arranged in the accommodation cavity. The plurality of spraying components are respectively used to spray water into the accommodation cavity to form a water curtain to settle the second powder with a particle size of a second preset value flowing into the accommodation cavity through the first separation outlet.

[0006] Furthermore, the circulating fluidized bed dust removal device further includes: a circulating pump respectively connected to a water supply unit and a plurality of spraying components in the shell main body for supplying liquid to the plurality of spraying components.

[0007] Further, each spraying component is connected to the circulation pump through a first communication pipeline. Each spraying component includes: a plurality of spraying members, one ends of the plurality of spraying members are respectively connected to the first communication pipeline, and the other ends of the plurality of spraying members are arranged at an annular interval and a preset angle is provided between adjacent two spraying members; wherein, the preset angle A satisfies: 25° ≤ A ≤ 35°.

[0008] Further, each spraying member includes a first spraying section and a second spraying section connected to the end of the first spraying section. The first spraying section is connected to the first communication pipeline. The second spraying section is a conical structure and a plurality of spraying orifices are provided on the second spraying section. The diameter of each spraying orifice is within a first preset range value. Wherein, the first preset range value satisfies: 0.2mm ≤ L1 ≤ 0.5mm.

[0009] Further, a plurality of spraying components are arranged at intervals in a straight line direction in the accommodating cavity; or, a plurality of spraying components are arranged in a spiral direction in the accommodating cavity.

[0010] Further, a PH detector and a conductivity detector are respectively arranged on the first communication pipeline. The PH detector is used to detect the PH value of the water in the first communication pipeline, and the conductivity detector is used to detect the conductivity of the water in the first communication pipeline.

[0011] Further, a first control valve is arranged on the first communication pipeline between the PH detector and the spraying component or between the conductivity detector and the spraying component to control the on-off of the first communication pipeline.

[0012] Further, a second communication pipeline communicating with the accommodating cavity is arranged on the housing main body. The second communication pipeline is used for discharging the sewage located in the accommodating cavity. A second control valve is arranged on the second communication pipeline to control the on-off of the second communication pipeline.

[0013] Further, a third communication pipeline communicating with the accommodating cavity is arranged on the housing main body to discharge the tail gas generated by the second powder material settled in the accommodating cavity. A dust detector and a third control valve are arranged on the third communication pipeline. The third control valve is used to control the on-off of the third communication pipeline, and the dust detector is used to detect the dust concentration in the tail gas discharged through the third communication pipeline.

[0014] Further, an air volume control component is arranged on the cyclone separator to control the wind speed in the cyclone separator within a second preset range value; wherein, the second preset range value L2 satisfies: 15m / s ≤ L2 ≤ 25m / s.

[0015] Applying the technical solution of the present utility model, the circulating fluidized bed dust removal device includes a fluidized bed main body, a cyclone separator and a dust removal structure; the cyclone separator is connected to the exhaust duct of the fluidized bed main body, and the cyclone separator is provided with a first separation outlet and a second separation outlet. The second separation outlet is connected with a storage component, so that the first powder with a particle size of a first preset value discharged through the exhaust duct and separated by the cyclone separator is collected in the storage component; the dust removal structure is connected to the first separation outlet. The dust removal structure includes a shell main body with an accommodation cavity and a plurality of spraying components arranged in the accommodation cavity. The plurality of spraying components are respectively used to spray water into the accommodation cavity to form a water curtain, so as to settle the second powder with a particle size of a second preset value flowing into the accommodation cavity through the first separation outlet. In this way, the cyclone separator collects and separates the material particles blown out by the fluidized bed, so as to recover most of the first powder with a particle size within the first preset value to the storage component, while the remaining second powder with a particle size within the second preset value is transported to the dust removal structure, and the water curtain formed by spraying with a plurality of spraying components is used to perform dust removal and settlement on it, and the clean tail gas after dust removal is discharged into the atmosphere, thus solving the problems in the prior art that in the production process of the circulating fluidized bed, it is easy to cause dust pollution and loss due to the loss of materials with lighter particles, and affect the drying efficiency of the drying tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings forming a part of this application are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation of the present utility model. In the drawings:

[0017] Figure 1 FIG. shows the overall structural schematic diagram provided by an embodiment of the circulating fluidized bed dust removal device according to the present utility model;

[0018] Figure 2 FIG. shows the structural schematic diagram of the spraying member provided by an embodiment of the circulating fluidized bed dust removal device according to the present utility model.

[0019] Among them, the above-mentioned accompanying drawings include the following reference numerals:

[0020] 10. Fluidized bed main body; 20. Cyclone separator; 21. First separation outlet; 22. Second separation outlet; 23. Storage component; 24. Air volume control component; 30. Dust removal structure; 31. Shell main body; 32. Accommodation cavity; 33. Spraying component; 331. Spraying member; 3310. First spraying section; 3311. Second spraying section; 3312. Spraying port; 34. First communication pipeline; 340. PH detection component; 341. Conductivity detection component; 35. Second communication pipeline; 36. Third communication pipeline; 361. Dust detection component; 40. Circulation pump. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will describe the present utility model in detail with reference to the accompanying drawings and in conjunction with the embodiments.

[0022] In order to solve the problems in the prior art that in the production process of a circulating fluidized bed, it is easy to cause the loss of materials with relatively light particles, resulting in dust pollution and loss, and affecting the drying efficiency of the drying tower, the present utility model provides a circulating fluidized bed dust removal device.

[0023] Please refer to Figure 1 and Figure 2 As shown, applying the technical solution of the present utility model, the circulating fluidized bed dust removal device includes a fluidized bed main body 10, a cyclone separator 20, and a dust removal structure 30; the cyclone separator 20 is connected to the exhaust duct of the fluidized bed main body 10, the cyclone separator 20 is provided with a first separation outlet 21 and a second separation outlet 22, and the second separation outlet 22 is connected with a storage component 23, so that the first powder with a particle size of a first preset value discharged through the exhaust duct and separated by the cyclone separator 20 is collected in the storage component 23; the dust removal structure 30 is connected to the first separation outlet 21, and the dust removal structure 30 includes a shell main body 31 having an accommodation cavity 32 and a plurality of spraying components 33 arranged in the accommodation cavity 32, and the plurality of spraying components 33 are respectively used to spray water into the accommodation cavity 32 to form a water curtain, so as to sediment the second powder with a particle size of a second preset value flowing into the accommodation cavity 32 through the first separation outlet 21.

[0024] Applying the technical solution of this embodiment, the cyclone separator 20 collects and separates the material particles blown out by the fluidized bed, so as to recover most of the first powder with a particle size within the first preset value into the storage component 23, and the remaining second powder with a particle size within the second preset value is transported into the dust removal structure 30, and the water curtain formed by spraying with the plurality of spraying components 33 is used to perform dust removal and sedimentation on it, and the clean tail gas after dust removal is discharged into the atmosphere, thereby solving the problems in the prior art that in the production process of a circulating fluidized bed, it is easy to cause the loss of materials with relatively light particles, resulting in dust pollution and loss, and affecting the drying efficiency of the drying tower.

[0025] In this embodiment, the first preset value L1 satisfies: 5μm ≤ L1 ≤ 10μm; the second preset value L2 satisfies: L2 < 5μm.

[0026] In this embodiment, the circulating fluidized bed dust removal device further includes a circulation pump 40, and the circulation pump 40 is respectively connected to a water supply unit and a plurality of spraying components 33 in the shell main body 31, so as to supply liquid to the plurality of spraying components 33.

[0027] As Figure 1 and Figure 2As shown in the figure, each spraying component 33 is respectively connected to the circulation pump 40 through a first communication pipeline 34. Each spraying component 33 includes a plurality of spraying parts 331. One ends of the plurality of spraying parts 331 are respectively connected to the first communication pipeline 34, and the other ends of the plurality of spraying parts 331 are arranged at an annular interval and a preset included angle is set between two adjacent spraying parts 331. Among them, the preset included angle A satisfies: 25°≤A≤35°. In this way, the plurality of spraying parts 331 spray in different directions respectively, so that a water curtain is formed in the accommodation cavity 32 under the simultaneous spraying of the plurality of spraying components 33, so as to combine and settle with the second powder material flowing into the accommodation cavity 32 to achieve the effect of dust removal.

[0028] Specifically, each spraying part 331 includes a first spraying section 3310 and a second spraying section 3311 connected to the end of the first spraying section 3310. The first spraying section 3310 is connected to the first communication pipeline 34. The second spraying section 3311 is a conical structure and a plurality of spraying ports 3312 are arranged on the second spraying section 3311. The diameter of each spraying port 3312 is within a first preset range value. Among them, the first preset range value satisfies: 0.2mm≤L1≤0.5mm. In this way, the water supplied through the first communication pipeline 34 flows through the first spraying section 3310 to the second spraying section 3311 and is respectively ejected through the plurality of spraying ports 3312, so that the plurality of spraying components 33 spray in different directions respectively to form a water curtain for dust removal operation.

[0029] Optionally, the plurality of spraying components 33 are arranged at intervals in a straight line direction in the accommodation cavity 32; or the plurality of spraying components 33 are arranged in a spiral direction in the accommodation cavity 32. In this way, the water curtain formed under the spraying of the plurality of spraying components 33 can cover the accommodation cavity 32, realizing a dust removal effect without dead angles.

[0030] In order to reduce water consumption, a PH detection component 340 and a conductivity detection component 341 are respectively arranged on the first communication pipeline 34. The PH detection component 340 is used to detect the PH value of the water in the first communication pipeline 34, and the conductivity detection component 341 is used to detect the conductivity of the water in the first communication pipeline 34. In this way, the PH value and conductivity of the water are respectively detected in real time by the PH detection component 340 and the conductivity detection component 341, and then the inflow of fresh water and the discharge of sewage in the accommodation cavity 32 are controlled.

[0031] Specifically, a first control valve is provided on the first communication pipeline 34 between the PH detection member 340 and the injection member 33 or between the conductivity detection member 341 and the injection member 33 to control the on-off of the first communication pipeline 34. In this way, the PH value and conductivity of the water flowing into the accommodation cavity 32 through the first flow pipeline are detected by the PH detection member 340 and the conductivity detection member 341 respectively, and then the first control valve is controlled to open or close according to the detected PH value and conductivity, so as to control the inflow of fresh water and the discharge of sewage in the accommodation cavity 32, playing a role in reducing water consumption.

[0032] Specifically, a second communication pipeline 35 communicating with the accommodation cavity 32 is provided on the housing main body 31. The second communication pipeline 35 is used for discharging the sewage in the accommodation cavity 32, and a second control valve is provided on the second communication pipeline 35 to control the on-off of the second communication pipeline 35. In this way, after the PH detection member 340 and the conductivity detection member 341 respectively detect the PH value and conductivity value of the water in the accommodation cavity 32, the second control valve is controlled to open or close to control the discharge of the sewage with the second powder after water curtain sedimentation in the accommodation cavity 32.

[0033] Specifically, a third communication pipeline 36 communicating with the accommodation cavity 32 is provided on the housing main body 31 to discharge the tail gas generated by the second powder sedimented in the accommodation cavity 32. A dust detection member 361 and a third control valve are provided on the third communication pipeline 36. The third control valve is used to control the on-off of the third communication pipeline 36, and the dust detection member 361 is used to detect the dust concentration in the tail gas discharged through the third communication pipeline 36. In this way, the tail gas generated after the second powder is sedimented by the water curtain in the accommodation cavity 32 is discharged from the third communication pipeline 36. The concentration of the second powder contained in the tail gas discharged through the third communication pipeline 36 is detected online in real time by the dust detection member 361, and then the number of injection members 33 opened in the accommodation cavity 32 is controlled according to the detection result of the dust detection member 361 to achieve the best dust removal effect.

[0034] In this embodiment, an air volume control member 24 is provided on the cyclone separator 20 to control the wind speed in the cyclone separator 20 within a second preset range value; wherein, the second preset range value L2 satisfies: 15m / s ≤ L2 ≤ 25m / s. In this way, the cyclone separator 20 maintains a rotation speed within the second preset range to separate the first powder and the second powder in sequence and perform collection and dust removal operations respectively.

[0035] In this embodiment, the cyclone separator 20 is a cyclone separator 20 with a processing air volume of 4000m³ / h; the dust removal structure 30 is a water curtain dust collector with a processing water volume of 20m³ / h.

[0036] As can be seen from the above description, the above embodiments of the present utility model achieve the following technical effects:

[0037] The circulating fluidized bed dust removal device includes a fluidized bed main body, a cyclone separator and a dust removal structure; the cyclone separator is connected to the exhaust duct of the fluidized bed main body, and a first separation outlet and a second separation outlet are provided on the cyclone separator. The second separation outlet is connected with a storage component, so that the first powder with a particle size of a first preset value discharged through the exhaust duct and separated by the cyclone separator is collected in the storage component; the dust removal structure is connected to the first separation outlet, and the dust removal structure includes a shell main body with an accommodation cavity and a plurality of spraying components arranged in the accommodation cavity. The plurality of spraying components are respectively used to spray water into the accommodation cavity to form a water curtain, so as to sediment the second powder with a particle size of a second preset value flowing into the accommodation cavity through the first separation outlet. In this way, the cyclone separator collects and separates the material particles blown out by the fluidized bed, so that most of the first powder with a particle size within the first preset value is recovered into the storage component, while the remaining second powder with a particle size within the second preset value is transported into the dust removal structure, and the water curtain formed by spraying of the plurality of spraying components is used to remove dust and sediment it, and the clean tail gas after dust removal is discharged into the atmosphere, thereby solving the problems in the prior art that in the production process of the circulating fluidized bed, it is easy to cause dust pollution and loss due to the loss of materials with lighter particles, and affect the drying efficiency of the drying tower.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangements, numerical expressions and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0041] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the drawings for the device. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding explanations should be made for the spatial relative descriptions used here.

[0042] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, various changes and modifications can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A circulating fluidized bed dust removal device, characterized in that: include: Fluidized bed body (10); a cyclone separator (20) connected to an exhaust duct of the fluidized bed body (10); a first separation outlet (21) and a second separation outlet (22) are provided on the cyclone separator (20); the second separation outlet (22) is connected to a storage component (23), so that first powder having a particle size of a first preset value discharged through the exhaust duct and separated by the cyclone separator (20) is collected in the storage component (23); A dust removal structure (30) is connected to the first separation outlet (21), the dust removal structure (30) comprising a shell body (31) having a housing cavity (32) and a plurality of spray components (33) arranged in the housing cavity (32), the plurality of spray components (33) being respectively used to spray water into the housing cavity (32) to form a water curtain, so as to sediment a second powder having a particle size of a second preset value that flows into the housing cavity (32) through the first separation outlet (21).

2. The circulating fluidized bed dust removal device according to claim 1, characterized in that: The circulating fluidized bed dust removal device also includes: A circulation pump (40) is respectively connected to the water supply unit and the plurality of injection components (33) in the shell body (31) to supply liquid to the plurality of injection components (33).

3. The circulating fluidized bed dust removal device according to claim 2, characterized in that: Each of the injection components (33) is connected to the circulation pump (40) via a first connecting pipe (34), and each of the injection components (33) comprises: A plurality of injection members (331), one end of each of the plurality of injection members (331) being connected to the first connecting pipe (34), the other ends of the plurality of injection members (331) being arranged in an annular pattern and spaced apart and a preset angle being formed between two adjacent injection members (331); wherein the preset angle A satisfies: 25°≤A≤35°.

4. The circulating fluidized bed dust removal device according to claim 3, characterized in that: Each of the injection components (331) comprises a first injection section (3310) and a second injection section (3311) connected to an end of the first injection section (3310), the first injection section (3310) being connected to the first connecting pipe (34), the second injection section (3311) being a conical structure and provided with a plurality of injection ports (3312), the diameter of each of the injection ports (3312) being within a first preset range value, wherein the first preset range value satisfies: 0.2 mm ≤ L1 ≤ 0.5 mm.

5. The circulating fluidized bed dust removal device according to claim 1, characterized in that: A plurality of the injection components (33) are arranged in the accommodating cavity (32) at intervals along a straight line direction; or, The plurality of injection components (33) are arranged in the accommodating cavity (32) along a spiral direction.

6. The circulating fluidized bed dust removal device according to claim 3, characterized in that: The first connecting pipe (34) is provided with a pH detection component (340) and a conductivity detection component (341), respectively; the pH detection component (340) is used to detect the pH value of water in the first connecting pipe (34), and the conductivity detection component (341) is used to detect the conductivity of water in the first connecting pipe (34).

7. The circulating fluidized bed dust removal device according to claim 6, characterized in that: A first control valve is provided on the first connecting pipeline (34) between the pH detection component (340) and the injection component (33) or between the conductivity detection component (341) and the injection component (33) to control the opening and closing of the first connecting pipeline (34).

8. The circulating fluidized bed dust removal device according to claim 1, characterized in that: The shell body (31) is provided with a second communication pipeline (35) which is in communication with the accommodating cavity (32); the second communication pipeline (35) is used to discharge sewage in the accommodating cavity (32); and the second communication pipeline (35) is provided with a second control valve for controlling the opening and closing of the second communication pipeline (35).

9. The circulating fluidized bed dust removal device according to claim 1, characterized in that: The shell body (31) is provided with a third connecting pipe (36) connected to the accommodating cavity (32) for discharging tail gas generated by the second powder after settling in the accommodating cavity (32); the third connecting pipe (36) is provided with a dust detection element (361) and a third control valve; the third control valve is used to control the on-off of the third connecting pipe (36); and the dust detection element (361) is used to detect the dust concentration in the tail gas discharged through the third connecting pipe (36).

10. The circulating fluidized bed dust removal device according to claim 1, characterized in that: The cyclone separator (20) is provided with an air volume control component (24) for controlling the wind speed in the cyclone separator (20) within a second preset range value; wherein the second preset range value L2 satisfies: 15m / s≤L2≤25m / s.

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