CN102230717B - Body structure of boiling rotating fluidized bed - Google Patents

Abstract

The invention discloses a bed structure of a boiling swirling fluidized bed, which comprises an outer casing and an air distribution plate, and the outer casing and the air distribution plate are covered to form a fluidized bed cavity; the air distribution plate is groove-shaped and extends from the bed The feed end of the body is inclined to the discharge end. The air distribution plate is mainly composed of the air distribution bottom plate in the middle and the air distribution side plates on both sides. There are air injection side holes connected to the segmented air chambers on the air side plate, the air distribution bottom plate is toothed or wave-shaped, and the air injection bottom holes are opened between the teeth of the toothed air distribution bottom plate or at the trough of the wave-shaped air distribution bottom plate and The orifice faces the discharge end of the bed body, and the orifice of the jet side hole on the air distribution side plate faces the air distribution bottom plate. The bed structure of the invention is simple, the bed surface is smooth, the flow field is optimized, the fluidization state of the boiling swirling flow is greatly improved, and the energy consumption is further reduced.

Description

Bed structure of boiling swirl fluidized bed

technical field

The invention relates to a component part of a fluidized bed, in particular to a bed body structure of the fluidized bed.

Background technique

The bed structure of the existing boiling swirling fluidized bed is in the shape of an inverted trapezoidal shallow groove (see Chinese patent documents such as CN101629775A, CN101709913A, CN101708493A), and is inclined from front to back. Elbow gas injectors arranged in staggered rows, and multiple rows of gas injectors with cone heads arranged in staggered rows are arranged on the concave plane in the middle. Collect and rise to generate swirling flow, showing boiling swirling fluidization state, so as to achieve the purpose of moderately reducing the humidity of solid particles on the fluidized bed. However, the surface of the existing fluidized bed body is equipped with various protruding injectors, which leads to unevenness of the bed surface of the fluidized bed. Although the fluidized movement of the material layer can be realized, the movement resistance at the bottom of the boiling layer is relatively large. , There is a dead corner of material storage in the depression, which is easy to cause the gas injection hole to be blocked, and the structure of the whole fluidized bed body is complicated, and the preparation cost and maintenance cost are high. In order to better realize the overall function of the ebullating fluidized bed and improve the economy, applicability and operability of the ebullating fluidized bed, it is necessary for those skilled in the art to further improve the bed structure of the existing ebullating fluidized bed .

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a simple structure, smooth bed surface, optimized flow field, greatly improved boiling swirling fluidization state, greatly reduced moving resistance at the bottom of the boiling layer, and The bed structure of the boiling swirl fluidized bed with further reduced energy consumption.

In order to solve the above technical problems, the technical solution proposed by the present invention is a bed structure of a boiling swirling fluidized bed, which includes an outer shell and an air distribution plate, and the outer shell and the air distribution plate are covered to form a fluidized bed chamber The air distribution plate is groove-shaped and inclined from the feed end of the bed body to the discharge end. The air distribution plate is mainly composed of the air distribution bottom plate in the middle and the air distribution side plates on both sides. The bottom plate is provided with an air injection bottom hole communicating with the segmented air chamber of the boiling swirling fluidized bed, and the air distribution side plate is provided with a hole communicating with the segmented air chamber of the boiling swirling fluidized bed. The air-distributing bottom plate is tooth-shaped or wave-shaped, and the air-jet bottom hole is opened between the teeth of the tooth-shaped air distribution bottom plate or at the trough of the wave-shaped air distribution bottom plate, and the orifice faces the discharge end of the bed body , the orifice of the air jet side hole on the air distribution side plate faces the air distribution bottom plate.

In the bed structure of the above-mentioned boiling swirling fluidized bed, the air distribution side plate is inclined from the outer casing to the air distribution bottom plate, and the air distribution side plate does not have to be a flat plate, and it can be any desired shape, but the air distribution side plate is preferably in the shape of a right angle or an inverted trapezoid, and the air jet side hole is opened on the vertical panel of the stepped air distribution side plate, so that the structure is simplified and the design of the bed is optimized. Basically, it can be well ensured that the openings of the air injection side holes face the air distribution bottom plate, so as to form a gas swirl flow. The air jet side holes on the air distribution side plate can be arranged in any relatively regular manner, and the preferred arrangement is to set multiple rows of air jet side holes arranged longitudinally along the bed body on the air distribution side plate (from one of the longitudinal direction of the bed body) The arrangement period is one row), and two adjacent upper and lower rows of jet side holes are separated by a flat surface, a toothed surface or a wave surface on the air distribution side plate. Setting the air distribution side holes according to this preferred arrangement can make the air distribution of the air distribution side holes uniform in the longitudinal direction of the bed body and the height direction of the bed body, and make the structure of the air distribution side plate more compact and more convenient to process , can better form the gas swirl. As another preferred arrangement of the air jet side holes, the air distribution side plate is also provided with multiple rows of air jet side holes arranged longitudinally along the bed body, but the adjacent upper and lower rows of air jet side holes pass through the air distribution side plate. The separation surfaces formed by various combinations of flat surfaces, toothed surfaces, and wave surfaces are separated. Among the various preferred structures of the above-mentioned air distribution side plates, the optimal structure of the air distribution side plates can be selected according to the humidity control capacity and fluidization conditions of the boiling swirling fluidized bed.

In the bed structure of the above-mentioned ebullating swirling fluidized bed, the air distribution bottom plate preferably includes multiple rows of air-jet bottom holes arranged laterally along the bed (one arrangement period along the lateral direction of the bed is one row). Preferably, an airflow guide is provided on the air distribution bottom plate above the air injection bottom hole.

In the bed structure of the above-mentioned boiling swirling fluidized bed, preferably, the outer shell includes outer wall panels and inner wall panels, and the outer wall panels and inner wall panels are coated to form a fluidized bed body. The casing cavity of the wind box, the wind box includes a front wind box and a side wind box communicated with the segmented air chamber of the boiling swirl fluidized bed, the casing cavity includes a front cavity and a side wind box used as the front wind box Used as the side cavity of the side air box; the inner wall panel includes a front inner wall panel and a side inner wall panel, and the front inner wall panel is provided with a front wall communicating with the front air box and the fluidized bed cavity An air nozzle, a side wall air nozzle communicating with the side wind box and the fluidized bed cavity is opened on the side inner wall panel. More preferably, the front wall air nozzle is located in the middle of the lower part of the front inner wall panel, and the side wall air nozzle includes an upper side wall air nozzle located on the upper side of the side inner wall panel and a lower side wall air nozzle located on the lower part of the side inner wall panel. Side wall nozzle. The setting of the front wall air nozzle and the side wall air nozzle is to further optimize the gas swirling state, and most of the gas mainly enters the fluidized bed chamber from the air injection bottom hole and the air injection side hole. The number of the side wind boxes is not limited to one, and multiple can be provided. The inner side of the inner wall board is preferably provided with a detachable anti-wear and anti-corrosion inner lining board.

The discharge method of the boiling swirling fluidized bed can be to open an inner wall discharge port connected with the fluidized bed discharge hopper in the lower middle part of the rear inner wall, but as a further improvement on the bed structure of the boiling swirling fluidized bed As an improvement, a discharge port communicating with the bottom discharge pipe of the boiling swirling fluidized bed is opened on the air distribution bottom plate adjacent to the discharge end of the bed body. This kind of discharge method not only simplifies the structure of the fluidized bed, but also can be better integrated with the structure of the fluidized bed of the present invention, making the discharge more convenient and rapid, convenient for later cleaning and maintenance, and avoiding material accumulation .

Compared with the prior art, the present invention has the following advantages: the bed surface of the boiling swirling fluidized bed adopting the bed structure of the present invention is smooth and the flow field is optimized, so that the state of boiling swirling fluidization is greatly improved, and the bottom of the boiling layer The movement resistance is greatly reduced, the structure of the bed surface is more reasonable, there is no dead zone for material storage, and the pressure of the air supply can be reduced, further reducing the energy consumption of the air supply. The bed structure of the boiling swirling fluidized bed of the present invention can greatly improve and optimize the humidity control and drying effects of the fluidized bed; wet solid particle materials can be fully and uniformly dried in the bed structure of the fluidized bed of the present invention , and it is easy to realize industrialized large-scale production, especially suitable for the field of "coal humidity adjustment" in the coking industry and the field of "lignite upgrading and drying" in the coal industry, and has good economic and social benefits.

Description of drawings

Fig. 1 is a front view of the bed body structure of the fluidized bed in Example 1 of the present invention.

Fig. 2 is a left view of the bed body structure of the fluidized bed in Example 1 of the present invention.

Fig. 3 is a top view of the bed body structure of the fluidized bed in Example 1 of the present invention.

Fig. 4 is a partially enlarged view of I in Fig. 1 .

Fig. 5 is a front view of the bed body structure of the fluidized bed in Example 2 of the present invention.

Fig. 6 is a left view of the bed body structure of the fluidized bed in Example 2 of the present invention.

Fig. 7 is a top view of the bed body structure of the fluidized bed in Example 2 of the present invention.

Fig. 8 is a partially enlarged view of J in Fig. 5 .

Fig. 9 is a front view of the bed structure of the fluidized bed in Example 3 of the present invention.

Fig. 10 is a left view of the bed body structure of the fluidized bed in Example 3 of the present invention.

Fig. 11 is a top view of the bed body structure of the fluidized bed in Example 3 of the present invention.

Fig. 12 is a partially enlarged view at K in Fig. 9 .

illustration:

1. Outer shell; 11. Exterior wall panel; 12. Inner wall panel; 121. Front inner wall panel; 122. Side inner wall panel; 123. Front wall air nozzle; 124. Side wall air nozzle; 125. Upper side wall Air nozzle; 126. Lower side wall air nozzle; 127. Rear inner wall panel; 128. Anti-wear and anti-corrosion lining board; 2. Segmented air chamber; 21. Main air chamber; 22. Air volume and air pressure adjustment door; 23. Side air chamber; 3. Air distribution plate; 31. Air distribution bottom plate; 32. Air jet bottom hole; 321. Air flow guide; 33. Air distribution side plate; 34. Air jet side hole; 35. Flat surface; 36. Wave surface ;4. Bellows; 41. Front bellows; 42. Side bellows; 5. Bottom discharge pipe;

Detailed ways

The present invention will be further described below in combination with specific embodiments and accompanying drawings.

Example 1:

A bed structure of a boiling swirling fluidized bed of the present invention as shown in Figures 1 to 3, which includes an outer shell 1 and an air distribution plate 3, and the outer shell 1 and the air distribution plate 3 are coated to form a fluidized bed container cavity; the air distribution plate 3 is groove-shaped and inclined from the feed end to the discharge end of the bed body. The air distribution plate 3 is mainly composed of the air distribution bottom plate 31 in the middle and the air distribution side plates 33 on both sides. The air distribution bottom plate 31 is provided with the sectional air chamber 2 of the boiling swirling fluidized bed (the sectional air chamber of the boiling swirling fluidized bed generally includes the main air chamber 21, the side air chamber 23 and the air volume and pressure regulating door 22 and other components) The air-distributing bottom hole 32 is connected, and the air-distributing side plate 33 is provided with an air-jet side hole 34 communicating with the section air chamber 2 of the boiling swirl fluidized bed; Between the teeth of the tooth-shaped air distribution bottom plate 31 and the orifice faces the discharge end, the orifice of the air jet side hole 34 on the air distribution side plate 33 faces the air distribution bottom plate 31 .

In this embodiment, the air distribution side plate 33 is inclined from the outer casing 1 to the air distribution bottom plate 31 in a stepped shape, and the air injection side holes 34 are opened on the vertical plane of the stepped air distribution side plate 33 . The air distribution side plate 33 includes multiple rows of air injection side holes 34 arranged longitudinally along the bed body, and the adjacent upper and lower rows of air injection side holes 34 pass through a wave surface 36 located in the front section of the fluidized bed body and located in the fluidized bed body. A planar surface 35 of the rear section is separated by a partition surface combined.

In this embodiment, the air distribution bottom plate 31 includes multiple rows of air injection bottom holes 32 arranged laterally along the bed body. As shown in Figure 4, the air distribution bottom plate 31 is tooth-shaped, and the air injection bottom hole 32 is opened between the teeth of the tooth-shaped air distribution bottom plate 31 and the orifice is towards the discharge end. The air injection side hole 34 on the air distribution side plate 33 The opening faces the air distribution bottom plate 31 ; the toothed air distribution bottom plate 31 above the air injection bottom hole 32 is also provided with an airflow guide 321 . In this embodiment, the airflow guides 321 on the air distribution bottom plate 31 are arranged in a row at intervals.

In this embodiment, the outer shell 1 includes an outer wall panel 11 and an inner wall panel 12, and a detachable anti-wear and anti-corrosion inner lining board 128 is arranged on the inner side of the inner wall panel 12, and the outer wall panel 11 and the inner wall panel 12 cover Form a casing cavity used as the bed wind box 4 of the fluidized bed, the wind box 4 includes a front wind box 41 and a side wind box 42 that are communicated with the sectional wind chamber 2 of the boiling swirl fluidized bed, and the casing cavity includes a front wind box used as a front wind box 4. The front cavity of the air box 41 and the side cavity used as the side air box 42; the inner wall panel 12 includes a front inner wall panel 121, a side inner wall panel 122 and a rear inner wall panel 127, and the front inner wall panel 121 is provided with a connecting front The wind box 41 and the front wall tuyere 123 of the fluidized bed cavity, and the side wall panel 122 is provided with a side wall tuyere 124 connecting the side wind box 42 and the fluidized bed cavity. The front wall air nozzle 123 is located in the middle of the lower part of the front inner wall panel 121, and the side wall air nozzle 124 includes an upper side wall air nozzle 125 located at the upper part of the side inner wall panel 122 and a lower side wall air nozzle located at the lower part of the side inner wall panel 122 126.

In this embodiment, the number of sectional air chambers 2 and side air boxes 42 can be set in multiples. The lower part of the side wind box 42 communicates with the sectional air chamber 2 through the air volume and air pressure regulating door 22 .

In this embodiment, the lower middle part of the rear inner wall panel 127 is provided with a rear inner wall discharge port 6 communicating with the discharge hopper 7 of the fluidized bed, and the fluidized bed in this embodiment passes through the rear inner wall discharge port. 6 for discharge, and the number of discharge openings 6 on the rear inner wall is not limited to one.

Example 2:

A bed structure of the boiling swirling fluidized bed of the present invention as shown in Figures 5 to 8, which is basically the same as the bed structure of the fluidized bed in Example 1, the only difference from Example 1 is the following Two points: 1) The adjacent upper and lower rows of air injection side holes 34 set on the air distribution side plate 33 are all separated by the wave surface 36 on the air distribution side plate 33, and all other components and connection methods are the same as those in the embodiment 1 is the same; 2) As shown in Figure 8, the air distribution bottom plate 31 above each row of air injection bottom holes 32 in this embodiment is provided with airflow guides (321) correspondingly.

Example 3:

A bed structure of the boiling swirling fluidized bed of the present invention as shown in Figures 9 to 12, which is basically the same as the bed structure of the fluidized bed in Example 1, and differs from Example 1 only in the following three Points: 1) The adjacent upper and lower rows of air injection side holes 34 set on the air distribution side plate 33 are all separated by the flat surface 35 on the air distribution side plate 33; 2) the inner wall panel 127 of this embodiment The rear inner wall discharge opening 6 is not opened in the middle part of the bottom, and it is to open a discharge opening 8 connected with the bottom discharge pipe 5 of the fluidized bed at the longitudinal discharge end of the air distribution bottom plate 31. The fluidized bed of the present embodiment The bed is discharged through the discharge port 8; in another specific embodiment, even the rear inner wall discharge port 6 in Example 1 and the discharge port 8 in this embodiment can be set at the same time; 3) as shown As shown in 12 , no airflow guide 321 is provided on the air distribution bottom plate 31 above the air injection bottom hole 32 in this embodiment.

The application of the bed structure of the fluidized bed in the above-mentioned embodiments in the integral device of the boiling swirling fluidized bed is as follows: the outer casing 1 of the bed structure is generally in the shape of a cuboid, and its upper part is generally connected to the boiling swirling flow by a flange. The upper casing of the fluidized bed communicates with the air inlet pipes of the segmental air chambers 2 in the lower part of the fluidized bed; the segmented air chambers 2 are generally located at the lower part of the fluidized bed body, and each segmented air chamber The room can be divided into the main air chamber in the middle and the side air chambers on both sides. The air volume and pressure adjustment door 22 is installed at the lower part of the side air chamber. It is communicated with the air intake pipe, and the air volume and air pressure of each section air chamber 2 are independently regulated by the regulating door on the air intake pipe. The above-mentioned embodiments only give the bed structure of one section of boiling swirling fluidized bed. In practice, multiple sections of the bed structure of boiling swirling fluidized bed in the present invention can be connected end to end to form the boiling swirling flow of large-scale humidity control machine. bed body.

The working principle of the bed body structure of the boiling swirl fluidized bed of this embodiment is: most of the airflow sent in after the segmented air chamber 2 and the main air chamber 21 passes through the air distribution bottom plate 31 and is sprayed by the air injection bottom hole 32. out into the fluidized bed cavity, and a small amount of gas is ejected from the front wall air nozzle 123 provided at the front bellows 41 into the fluidized bed cavity, and is affected by the structure of the jet bottom hole 32 toward the discharge end. The air flow passing through the air distribution bottom plate 31 flows from the feed end to the discharge end; the air flow sent from the segmented air chamber 2 and the side air chamber 23 enters the side air box 42 after passing through the air volume and pressure regulating door 22, and then most of the air flow Through the air distribution side plate 33, it is ejected from the air injection side hole 34 into the fluidized bed cavity, and a small amount of gas is ejected from the upper side wall nozzle 125 and the lower side wall nozzle 126 at the side wind box 42 into the fluidized bed. As for the bed chamber, due to the symmetrical arrangement of the air distribution side plates 33 on both sides, the airflow ejected from both sides meets above the air distribution bottom plate 31 and then rises upwards, forming two beds that move toward the middle at the bottom position and move toward both sides at the upper middle position. The gas swirl flow of the opposite circular trajectory; finally, the airflow passing through the air distribution bottom plate 31 and the airflow passing through the air distribution side plate 33 are synthesized into two gas swirl flows in the form of opposite helixes by fluidization The feed end of the bed body moves toward the discharge end.

Claims (7)

1. a boiling cyclone fluidized bed bed structure, it comprises shell body (1) and air distribution plate (3), the coated fluid bed cavity volume that forms of described shell body (1) and air distribution plate (3), described air distribution plate (3) is groove shape and tilts to discharge end from the feed end of bed body, described air distribution plate (3) is mainly comprised of the cloth wind side plate (33) of middle cloth wind base plate (31) and both sides, on described cloth wind base plate (31), offer the jet bottom outlet (32) being connected with described boiling cyclone fluidized bed segmentation air compartment (2), on described cloth wind side plate (33), offer the jet side opening (34) being connected with described boiling cyclone fluidized bed segmentation air compartment (2), it is characterized in that: described cloth wind base plate (31) is dentation or wavy, described jet bottom outlet (32) is opened in the between cog of dentation cloth wind base plate (31) or the trough place of wavy cloth wind base plate (31) and aperture towards the discharge end of bed body, the aperture of the jet side opening (34) on described cloth wind side plate (33) is towards described cloth wind base plate (31),

Described cloth wind side plate (33) tilts from described shell body (1) to cloth wind base plate (31) and is stepped, and described jet side opening (34) is opened in the vertical panel of described stepped cloth wind side plate (33);

On described cloth wind side plate (33), comprise the jet side opening (34) that many rows longitudinally arrange along bed body, and the division surface that the jet side opening (34) of adjacent two rows is combined into by the plane surface (35) on cloth wind side plate (33), a wave surface (36) or plane surface (35) and wave surface (36) is separated.

2. boiling cyclone fluidized bed bed structure according to claim 1, is characterized in that, comprises that many rows are along the jet bottom outlet (32) of bed body lateral arrangement on described cloth wind base plate (31); Described segmentation air compartment (2) comprises main air chamber (21) and crosswind chamber (23); The air-flow major part of sending into behind segmentation air compartment (2) and main air chamber (21) enters fluid bed cavity volume through cloth wind base plate (31) and by jet bottom outlet (32) ejection.

3. boiling cyclone fluidized bed bed structure according to claim 2, is characterized in that, the cloth wind base plate (31) of described jet bottom outlet (32) top is provided with air flow guide (321).

4. boiling cyclone fluidized bed bed structure according to claim 3, it is characterized in that, described shell body (1) comprises Side fascia (11) and lining (12), the coated shell cavity as fluidized bed body bellows (4) that forms of described Side fascia (11) and lining (12), described bellows (4) comprise front bellows (41) and the crosswind case (42) being connected with described boiling cyclone fluidized bed segmentation air compartment (2), and described shell cavity comprises the front cavity that is used as described front bellows (41) and the side cavity that is used as described crosswind case (42); Described lining (12) comprises front lining (121) and side lining (122), on described front lining (121), offer the front wall tuyere (123) that is communicated with described front bellows (41) and fluid bed cavity volume, on described side lining (122), offer the side wall tuyere (124) that is communicated with described crosswind case (42) and fluid bed cavity volume.

5. boiling cyclone fluidized bed bed structure according to claim 4, it is characterized in that, described front wall tuyere (123) is positioned at the centre position of described front lining (121) bottom, and described side wall tuyere (124) comprises the lower side wall tuyere (126) that is positioned at the upper side wall tuyere (125) on side lining (122) top and is positioned at side lining (122) bottom.

6. boiling cyclone fluidized bed bed structure according to claim 1 and 2, it is characterized in that, described shell body (1) comprises Side fascia (11) and lining (12), the coated shell cavity as fluidized bed body bellows (4) that forms of described Side fascia (11) and lining (12), described bellows (4) comprise front bellows (41) and the crosswind case (42) being connected with described boiling cyclone fluidized bed segmentation air compartment (2), and described shell cavity comprises the front cavity that is used as described front bellows (41) and the side cavity that is used as described crosswind case (42); Described lining (12) comprises front lining (121) and side lining (122), on described front lining (121), offer the front wall tuyere (123) that is communicated with described front bellows (41) and fluid bed cavity volume, on described side lining (122), offer the side wall tuyere (124) that is communicated with described crosswind case (42) and fluid bed cavity volume; Described lining (12) inner side is provided with dismountable abrasion resistant corrosion resistant interior lining panel (128).

7. according to the boiling cyclone fluidized bed bed structure described in any one in claim 1～5, it is characterized in that: on the described cloth wind base plate (31) of contiguous bed body discharge end, have the discharge gate (8) being connected with boiling cyclone fluidized bed end drainage conduit (5); Segmentation air compartment (2) comprises main air chamber (21), crosswind chamber (23) and airflow pressure adjustment doors (22); Each segmentation air compartment (2) is separated into main air chamber (21), middle part and crosswind chamber, both sides (23), and airflow pressure adjustment doors (22) is established in bottom, crosswind chamber (23).