CN219318829U - Circulating fluidized bed - Google Patents
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- CN219318829U CN219318829U CN202220083862.5U CN202220083862U CN219318829U CN 219318829 U CN219318829 U CN 219318829U CN 202220083862 U CN202220083862 U CN 202220083862U CN 219318829 U CN219318829 U CN 219318829U
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Abstract
The utility model discloses a circulating fluidized bed, which comprises a bottom bin, a fluidization upper bin and an active cyclone separation bin; the bottom of the bin is provided with an air distribution plate, and the upper end of the bottom bin is communicated with the bin; the upper end of the bin is communicated with the fluidization upper bin, the fluidized bed is suitable for the technical field of fluidized beds, has three operation modes, namely a self-circulation mode and a partial self-circulation mode, can select different operation modes according to specific conditions and process requirements of materials, can be switched through facilities such as a valve, and can effectively control the fine powder leakage ratio on the premise of ensuring fluidization effect by selecting different operation modes, and is suitable for more severe fluidized bed working conditions; the fine powder in the dried material can be separated independently, so that dust flying in the discharging process and the follow-up working section is reduced, and the working environment is protected.
Description
Technical Field
The utility model belongs to the technical field of fluidized beds, and particularly relates to a circulating fluidized bed.
Background
Fluidized bed, also known as ebullated bed, is a device that utilizes a gas stream to pass through a bed of particulate solids to bring the solids into suspension motion and to carry out a gas-solid phase reaction. The fluidized bed is widely applied to the fields of chemical industry, medicine, food, boilers and the like, and is core equipment in the technical processes of drying, chemical reaction, combustion, granulation, coating and the like. In the working process of the fluidized bed, a large amount of dust can be taken away when gas passes through the solid particle layer, and the dust needs to be separated out through a filtering and separating device, otherwise, the yield can be reduced, and the environment is polluted.
The applicant has filed in 2020 an utility model patent with the application number 202010630587.X and 202010630184.5. Wherein patent application number 202010630587.X discloses a novel dust separation and collection device, patent application number 202010630184.5 discloses a novel fluidized bed. The technology utilizes the centrifugal fan blade to drive the airflow to rotate, thereby realizing dust separation and improving the separation efficiency. However, this technology has certain disadvantages, mainly expressed in the following two aspects:
first, the separation method is used for intercepting finer dust in proportion, so that a very small amount of dust is leaked, and most of the dust can flow back to the bin for further fluidization, and circulation is performed. Although the separation efficiency of this technique is higher than that of the conventional cyclone separation technique, the returned fine powder is again carried into the cyclone separation bin by the air flow during the operation of the fluidized bed, and the absolute amount of the leaked fine powder is continuously increased as time goes up, so that the overall separation efficiency is reduced. On the other hand, the dried material contains a large amount of fine powder, so that dust pollution in the subsequent process is increased, and dust removal burden is brought.
Secondly, in certain specific process links, such as early powder drying, spray granulation, late granule drying and the like, the content of fine powder in the material is higher, and the amount of leaked fine powder is increased in equal proportion. The fluidized bed described in the above technology can effectively reduce the powder removal rate by reducing the overall air discharge rate of the system, but too small air quantity reduces the fluidization effect and affects the realization of the process target, so that it is difficult to obtain a satisfactory separation effect when the proportion of fine powder is high.
The application aims at disclosing a fluidized bed, can realize inside air current self-loopa, when reducing the amount of wind of airing exhaust, guarantee the fluidization effect, can separate out the fine powder in the material alone according to the technology needs simultaneously to reduce the loss, reduce the pollution of dust to the environment.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art and provides a circulating fluidized bed.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a circulating fluidized bed comprising: the device comprises a bottom bin, a fluidization upper bin and an active cyclone separation bin;
the bottom of the bin is provided with an air distribution plate, and the upper end of the bottom bin is communicated with the bin; the upper end of the bin is communicated with the fluidization upper bin;
the active cyclone separation bin comprises a cylinder body, wherein the cylinder body adopts a cylindrical structure and comprises a side wall, an end face A and an end face B, a central air port is formed in the central position of the end face B, a dust collecting port is formed in the bottom end of the joint of the end face B and the side wall, and a dust collecting bin is connected below the dust collecting port;
a tail end air outlet is formed in the joint of the end face A and the side wall;
the centrifugal fan is characterized in that a driving shaft is inserted into the center of the end face A, and a centrifugal fan blade is arranged at one end, located inside the end face A, of the driving shaft.
The upper part of the fluidization upper bin is provided with a fluidization upper bin air outlet, and the fluidization upper bin air outlet is communicated with the central air outlet;
the dust collection bin is characterized in that a dust discharge port is formed in the bottom of the dust collection bin, and the dust discharge port is communicated with the bottom bin through a return pipe A and a control valve A.
Preferably, a reflux port is formed in the side wall of the fluidization upper bin, and the dust discharge port is connected with the reflux port through a reflux pipe B.
Preferably, the return pipe B is provided with a control valve B.
Preferably, the cyclone separator also comprises a cyclone separator, wherein the upper end of the cyclone separator is provided with an air inlet and an air outlet, and the bottom of the cyclone separator is provided with a discharge outlet;
the discharge port is communicated with the collecting container or the discharge valve;
the air inlet is connected with the dust exhaust port through a return pipe C; the return pipe C is provided with a control valve C;
the exhaust outlet is communicated with a reflux outlet on the side wall of the fluidization upper bin through a reflux pipe D; and the return pipe D is provided with a control valve D.
Preferably, the tail end air outlet is connected with an air exhaust filter.
Preferably, the tail end air outlet or the air exhaust filter is connected with an air exhaust fan.
Preferably, the bottom bin is communicated with a fresh air pipeline, and the fresh air pipeline is communicated with an air heating and filtering device.
Preferably, a fresh air control valve is arranged on the fresh air pipeline.
Preferably, a guide plate is arranged in the area, close to the central air opening, inside the cylinder body, the guide plate is a circular flat plate, the center of the circle of the guide plate is arranged on the central axis of the cylinder body, and the diameter of the guide plate is larger than that of the central air opening.
Preferably, the fluidization upper bin air outlet is communicated with the central air outlet through a central connecting pipe.
In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:
according to the utility model, the fluidized bed is provided with three operation modes, namely a self-circulation mode, a partial self-circulation mode and a full fresh air mode, different operation modes can be selected according to specific conditions and process requirements of materials, and can be switched through facilities such as a valve, and the fine powder leakage ratio can be effectively controlled on the premise of ensuring fluidization effect by selecting different operation modes, so that the fluidized bed is suitable for more severe fluidized bed working conditions;
according to the utility model, the fine powder in the dried material can be separated independently, so that dust flying in the discharging process and the subsequent working section is reduced, and the working environment is protected.
Drawings
FIG. 1 is a schematic view showing the overall structure of a circulating fluidized bed according to the present utility model.
Reference numerals: 01. a bottom bin; 011. a fresh air pipeline; 012. a fresh air control valve; 013. an air heating filter device;
02. a storage bin; 021. a wind distribution plate;
03. fluidization loading; 031. fluidization upper bin exhaust outlet; 032. a center connecting pipe; 033. a top-spraying spray gun; 034. a return port;
04. an active cyclone separation bin; 041. a cylinder; 04101. a sidewall; 04102. an end face A; 04103. an end face B; 042. centrifugal fan blades; 043. a drive shaft; 044. a central tuyere; 045. a deflector; 046. a tail end exhaust outlet; 047. a dust collection port; 048. a dust collection bin; 049. a dust discharge port; 0410. a control valve A; 0411. a return pipe A; 0412. a return pipe B; 0413. a control valve B; 0414. a return pipe C; 0415. a control valve C; 0416. a return pipe D; 0417. a control valve D; 0418. an exhaust filter; 0419. an exhaust fan;
05. a cyclone separator; 051. an air inlet; 052. an air outlet; 053. a discharge port; 054. a collection container; 055. a discharge valve.
Detailed Description
An embodiment of a circulating fluidized bed according to the present utility model is further described below with reference to fig. 1.
The circulating fluidized bed of the present utility model is not limited to the description of the following examples.
Example 1:
this example shows a specific implementation of a circulating fluidized bed, as shown in fig. 1, comprising: a bottom bin 01, a bin 02, a fluidization upper bin 03 and an active cyclone separation bin 04;
the bottom of the bin 02 is provided with an air distribution plate 021, and the upper end of the bottom bin 01 is communicated with the bin 02; the upper end of the bin 02 is communicated with the fluidization upper bin 03;
the active cyclone separation bin 04 comprises a cylinder 041, the cylinder 041 adopts a cylindrical structure and comprises a side wall 04101, an end face A04102 and an end face B04103, a central air port 044 is formed in the central position of the end face B04103, a dust collecting port 047 is formed in the bottom end of the joint of the end face B04103 and the side wall 04101, and a dust collecting bin 048 is arranged below the dust collecting port 047 in a connecting way;
a tail end air outlet 046 is arranged at the joint of the end face A04102 and the side wall 04101;
a driving shaft 043 is inserted in the center of the end face A04102, and a centrifugal fan blade 042 is arranged at one end of the driving shaft 043 positioned on the inner side of the end face A04102.
The upper part of the fluidization upper bin 03 is provided with a fluidization upper bin exhaust outlet 031, and the fluidization upper bin exhaust outlet 031 is communicated with a central air outlet 044;
the bottom of the dust collection bin 048 is provided with a dust discharge port 049, and the dust discharge port 049 is communicated with the bottom bin 01 through a return pipe A0411 and a control valve A0410.
Example 2:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 1, and a return port 034 is formed in the side wall of the fluidization upper bin 03, and a dust discharge port 049 is connected to the return port 034 through a return pipe B0412.
Example 3:
this example shows a specific embodiment of a circulating fluidized bed, as shown in fig. 1, otherwise constructed similarly to example 2, with a control valve B0413 mounted on return line B0412.
Example 4:
the embodiment provides a concrete implementation mode of a circulating fluidized bed, as shown in fig. 1, other structures are similar to those of the embodiment 2, and the circulating fluidized bed further comprises a cyclone separator 05, wherein an air inlet 051 and an air outlet 052 are formed in the upper end of the cyclone separator, and a discharge outlet 053 is formed in the bottom of the cyclone separator;
the discharge port 053 is communicated with a collecting container 054 or a discharge valve 055;
the air inlet 051 is connected with a dust exhaust port 049 through a return pipe C0414; the return pipe C0414 is provided with a control valve C0415;
the exhaust outlet 052 is communicated with a reflux outlet 034 on the side wall of the fluidization upper bin 03 through a reflux pipe D0416; the return line D0416 is provided with a control valve D0417.
Example 5:
the embodiment provides a concrete implementation mode of a circulating fluidized bed, as shown in fig. 1, other structures are similar to those of the embodiment 3, and the circulating fluidized bed further comprises a cyclone separator 05, wherein an air inlet 051 and an air outlet 052 are formed in the upper end of the cyclone separator, and a discharge outlet 053 is formed in the bottom of the cyclone separator;
the discharge port 053 is communicated with a collecting container 054 or a discharge valve 055;
the air inlet 051 is connected with a dust exhaust port 049 through a return pipe C0414; the return pipe C0414 is provided with a control valve C0415;
the exhaust outlet 052 is communicated with a reflux outlet 034 on the side wall of the fluidization upper bin 03 through a reflux pipe D0416; the return line D0416 is provided with a control valve D0417.
Example 6:
this example shows a specific embodiment of a circulating fluidized bed, as shown in fig. 1, and other structures are similar to those of example 1, and the exhaust port 046 is connected to the exhaust filter 0418.
Example 7:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 1, and the bottom bin 01 is connected to a fresh air pipeline 011, and the fresh air pipeline 011 is connected to an air heating filter 013.
Example 8:
this example shows a specific implementation of a circulating fluidized bed, as shown in fig. 1, and other structures are similar to those of example 1, and the exhaust port 046 or the exhaust filter 0418 is connected to the exhaust fan 0419.
Example 9:
this example shows a specific implementation of a circulating fluidized bed, and as shown in fig. 1, other structures are similar to those of example 6, and the exhaust port 046 or the exhaust filter 0418 is connected to the exhaust fan 0419.
Example 10:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 7, and a fresh air control valve 012 is provided on a fresh air pipeline 011.
Example 11:
in this example, as shown in fig. 1, other structures are similar to those of example 1, and a baffle 045 is installed in a region of the cylinder 041 near the central tuyere 044, where the baffle 045 is a circular plate, and its center is on the central axis of the cylinder 041, and its diameter is greater than that of the central tuyere 044.
Example 12:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 1, and the fluidization upper bin exhaust outlet 031 and the central air outlet 044 are communicated through a central connecting pipe 032.
Example 13:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 1, the fluidization upper bin exhaust outlet 031 may be opened at the top or the upper part of the side wall of the fluidization upper bin 03, and the connection mode of the fluidization upper bin exhaust outlet 031 and the central air outlet 044 may be connected by adopting a pipeline connection mode or a two-port overlapping mode, and when the two-port overlapping mode is adopted for connection, the exhaust outlet 031 is opened at the upper part of the side wall of the fluidization upper bin 03.
Example 14:
in this example, a concrete implementation of a circulating fluidized bed is shown in fig. 1, and other structures are similar to those of example 5, and the discharge port 053 of the cyclone separator can be directly connected with the collecting container 054, or connected with the discharge valve 055, and the other end of the discharge valve 055 is connected with the collecting container 054 again; the discharge valve 054 can be a conventional switch control valve or a shut-off valve.
Example 15:
in this embodiment, as shown in fig. 1, other structures are similar to those of embodiment 5, one end of the return pipe C is connected to the cyclone separator air inlet 051, and the other end of the return pipe C may be connected to the active cyclone separation bin dust discharge port 049, or may be connected to the front section of the return pipe B; one end of the return pipe D is connected with the cyclone separator exhaust outlet 052, and the other end of the return pipe D can be connected with the fluidization upper bin return outlet 034 and also can be connected with the rear section of the return pipe B.
Example 16:
this example shows a concrete implementation of a circulating fluidized bed, and as shown in fig. 1, other structures are similar to those of example 7, and a top spraying gun 033 is installed in the fluidization upper bin 03, and the nozzle of the top spraying gun is downward.
Working principle:
the driving shaft 043 drives the centrifugal fan blade 042 to rotate at a high speed, and two spiral airflows, namely an outer spiral airflow and an inner spiral airflow, are formed in the active cyclone separation bin body 041. Air is accelerated by the centrifugal fan blades 042, flows out from the outer edges of the centrifugal fan blades 042 to form outer spiral air flow, and the outer spiral air flow rotates along the side wall 04101 of the cylinder and simultaneously moves from the end face A to the end face B; and after reaching the end face B, the rotating radius is reduced inwards to form inner spiral air flow and moves towards the center direction of the centrifugal fan blade 042, the inner spiral air flow is accelerated by the fan blade again after reaching the centrifugal fan blade 042, and the inner spiral air flow enters the outer spiral air flow, and the inner spiral air flow is repeatedly circulated in the same way. For convenience of description, this recycle gas stream will be referred to as an inner recycle gas stream hereinafter.
In the circulating air flow in the active cyclone separation bin body 041, the air pressure of the outer spiral air flow is larger than the air pressure of the inner spiral air flow, so that a pressure difference gradient is formed, the air pressure in the dust collection bin 048 is higher than the air pressure in the central air port 044, the control valve A is opened, the fresh air control valve 012 is closed, and the air flow flows along the dust collection port 047, the dust collection bin 048, the dust discharge port 049, the return pipe A, the bottom bin 01, the air distribution plate 021, the fluidization upper bin 03, the fluidization upper bin air outlet 031, the central connecting pipe 032 and the central air port 044, so that another circulating air flow is formed. For ease of description, this recycle gas stream will be referred to hereinafter as the outer recycle gas stream.
Under the action of the air flow, the materials in the bin 02 are blown up by the air flow and reach a fluidization state, so that the process requirements of the processes of drying, granulating, coating, gas-solid reaction and the like are met. At this time, the air flow in the whole system is in a self-circulation state, the system does not collect fresh air and does not exhaust air outwards, and the operation mode at this time is a self-circulation mode.
In the material fluidization process, part of fine powder enters the active cyclone separation bin body 041 from the central air port 044 along with air flow, is converged into internal spiral air flow, starts to rotate at high speed, and under the action of centrifugal force, the rotation radius of the fine powder is continuously increased, finally reaches the side wall 04101 of the bin body and is converged, rotates along with external spiral air flow, simultaneously moves towards the end face B along the side wall 04101 of the bin body, finally flows into the dust collection port 047, is converged into the dust collection bin 048, flows into the bottom bin 01 through the dust discharge port 049 and the return pipe A, passes through the air distribution plate 021 and returns to the bin 02 again. Through this process, the fine powder carried by the gas stream is separated.
The fresh air control valve 012 is opened, a certain amount of fresh air is pumped in from the environment by the system, the same amount of exhaust air is discharged, the tiny amount of dust carried by the exhaust air is trapped by the exhaust air filter 0418, and clean air is discharged to the external environment. The mode of operation of the system at this time is the "partial self-circulation mode".
Under certain working conditions, such as heavy materials in a material bin or large fluidization air quantity, the pressure difference between two ends of the air distribution plate 021 is increased and exceeds the pressure difference gradient in the active cyclone separation bin body 041, so that a self-circulation mode cannot be used. The control valve A is closed, the control valve B is opened, the fresh air control valve 012 is opened, and the self-circulation air flow is blocked, but at this time, the dust in the dust collection bin 048 can flow back to the fluidization upper bin 03 through the return pipe B. Because the fluidization upper bin 03 is directly communicated with the central air port 044, the air pressure is close to the pressure difference of the internal spiral air flow and is always lower than the air pressure in the dust collection bin 048, and therefore, the reflux mode can be realized in three operation modes. At this time, the working mode of the system is a full fresh air mode.
In the self-circulation mode, the whole system does not exhaust air, so that powder is not leaked, and the self-circulation mode is suitable for early use in spray granulation. In early stage of spray granulation, the materials in the bin are all fine powder, and a small amount of spray operation is carried out in a self-circulation mode, so that dust leakage can be effectively controlled. After the materials are properly wetted, the amount of fine powder is reduced, fresh air is properly started, and the materials enter a 'partial self-circulation mode' for subsequent spraying and drying. The partial self-circulation mode is also suitable for powder drying, and the air flow passing through the air distribution plate 021 has self-circulation air flow and fresh air, so that the fluidization state can be ensured while the exhaust air is reduced. When the humidity of the material is large, the viscosity is large or the fluidity is poor, and fluidization is difficult, a full fresh air mode can be adopted, and the air discharge quantity is large at the moment, but the fine powder leakage rate of the whole system can still be controlled at an extremely low level because the fine powder is not contained in the material.
When the fluidized bed is used for wet particle drying, at the end of drying, as the water content of the material is reduced, the amount of fine powder in the material is gradually increased, at the moment, the control valve B can be closed, the control valve C can be opened, the control valve D can be opened, the air flow of the dust collection bin 048 can enter the fluidization upper bin 03 along the return pipe C, the control valve C, the cyclone separator, the return pipe D and the return port 034, and in the process, the fine powder is separated by the cyclone separator. Therefore, after the drying is finished, the powder content of the materials left in the bin 02 is very low, so that dust flying in the discharging process and the subsequent working procedures can be effectively reduced, and the production environment is protected.
According to the law of centrifugal acceleration, the centrifugal acceleration of the rotation center is zero. Thus, at the center of the inner spiral flow, i.e., at the location of the central axis of the cylinder 041, there is an elongated tubular region where the centrifugal force is near zero, which is a separation dead zone. This phenomenon may cause a small amount of fine powder flowing into the channel to be unable to be separated, thereby affecting the overall separation effect. The baffle 045 prevents the air flow flowing in from the central air port 044 from directly entering the separation dead zone, thereby improving the separation effect.
The active cyclone separation bin 04 has the function of an exhaust fan, but in certain specific cases, negative pressure in the system (such as larger resistance of an exhaust filter and feeding in a vacuum material pumping mode) is required to be increased or the air quantity is increased, and the exhaust fan can be additionally arranged at the rear section of the exhaust filter.
In order to collect the separated materials, a material storage container, a material discharge valve, a fan closing device and the like can be connected to the discharge port of the cyclone separator according to actual process requirements.
The working flow is as follows:
the driving shaft 043 drives the centrifugal fan blade 042 to rotate at a high speed to form internal circulation airflow.
In the circulating air flow in the active cyclone separation bin body 041, the external spiral air flow flows along the dust collection port 047, the dust collection bin 048, the dust discharge port 049, the return pipe A, the bottom bin 01, the air distribution plate 021, the fluidization upper bin 03, the fluidization upper bin air outlet 031, the central connecting pipe 032 and the central air port 044, so that the external circulating air flow is formed.
Under the action of the air flow, the materials in the bin 02 are blown up by the air flow and reach a fluidization state, and the top spraying spray gun 033 starts spraying liquid and atomizing at the moment by adopting a self-circulation mode. Part of fine powder enters the active cyclone separation bin barrel 041 from the central air port 044 along with air flow, is converged into inner spiral air flow, starts to rotate at high speed, continuously increases in rotation radius under the action of centrifugal force, finally reaches the side wall 04101 of the barrel and is converged, rotates along with outer spiral air flow, simultaneously moves towards the end face B along the side wall 04101 of the barrel, finally flows into the dust collection port 047, is converged into the dust collection bin 048, flows into the bottom bin 01 through the return pipe A, passes through the air distribution plate 021 and returns to the bin 02 again. Through this process, the fine powder carried by the gas stream is separated.
Spraying for a period of time, wetting powder and forming fine particles, influencing the fluidization state, and reducing the powder amount entering the external circulation airflow, wherein a 'partial self-circulation mode' is adopted; the fresh air control valve 012 is opened, a certain amount of fresh air is pumped in from the environment by the system, the same amount of exhaust air is discharged, the tiny amount of dust carried by the exhaust air is trapped by the exhaust air filter 0418, and clean air is discharged to the external environment.
Continuing spraying for a period of time, wherein the materials in the bin 02 are heavier, and only a very small amount of fine powder enters the external circulation airflow, and a full fresh air mode is adopted at the moment; the control valve A is closed, the control valve B is opened, the fresh air control valve 012 is opened, and the self-circulation air flow is blocked, but at this time, the dust in the dust collection bin 048 can flow back to the fluidization upper bin 03 through the return pipe B. Because the fluidization upper bin 03 is directly communicated with the central air port 044, the air pressure is close to the pressure difference of the internal spiral air flow and is always lower than the air pressure in the dust collection bin 048, and therefore, the reflux mode can be realized in three operation modes.
After the spray granulation is finished, wet granule drying is carried out, at the end of drying, along with the reduction of the water content of the material, the amount of fine powder in the material can be gradually increased, at the moment, the control valve B can be closed, the control valve C and the control valve D can be opened, the air flow of the dust collection bin 048 can enter the fluidization upper bin 03 along the return pipe C, the cyclone separator, the return pipe D and the return port 034, and in the process, the dust is separated by the cyclone separator and collected into the collection container 054. Therefore, after the drying is finished, the powder content of the materials left in the bin 02 is very low, so that dust flying in the discharging process and the subsequent working procedures can be effectively reduced, and the production environment is protected.
The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.
Claims (10)
1. A circulating fluidized bed, comprising: a bottom bin (01), a bin (02), a fluidization upper bin (03) and an active cyclone separation bin (04);
the bottom of the bin (02) is provided with an air distribution plate (021), and the upper end of the bottom bin (01) is communicated with the bin (02); the upper end of the bin (02) is communicated with the fluidization upper bin (03);
the active cyclone separation bin (04) comprises a cylinder body (041), wherein the cylinder body (041) adopts a cylindrical structure and comprises a side wall (04101), an end face A (04102) and an end face B (04103), a central air port (044) is formed in the central position of the end face B (04103), a dust collecting port (047) is formed in the bottom end of the joint of the end face B (04103) and the side wall (04101), and a dust collecting bin (048) is connected below the dust collecting port (047);
a tail end air outlet (046) is formed in the joint of the end face A (04102) and the side wall (04101);
a driving shaft (043) is inserted in the center of the end face A (04102), and a centrifugal fan blade (042) is arranged at one end of the driving shaft (043) positioned at the inner side of the end face A (04102);
the upper part of the fluidization upper bin (03) is provided with a fluidization upper bin air outlet (031), and the fluidization upper bin air outlet (031) is communicated with a central air outlet (044);
the dust collection bin (048) is characterized in that a dust discharge port (049) is formed in the bottom of the dust collection bin (048), and the dust discharge port (049) is communicated with the bottom bin (01) through a return pipe A (0411) and a control valve A (0410).
2. The circulating fluidized bed of claim 1, wherein: the side wall of the fluidization upper bin (03) is provided with a reflux port (034), and the dust discharge port (049) is connected with the reflux port (034) through a reflux pipe B (0412).
3. The circulating fluidized bed of claim 2, wherein: the return pipe B (0412) is provided with a control valve B (0413).
4. A circulating fluidized bed according to any one of claims 2 or 3, wherein: the cyclone separator (05) is provided with an air inlet (051) and an air outlet (052) at the upper end and a discharge outlet (053) at the bottom;
the discharge hole (053) is communicated with the collecting container (054) or the discharge valve (055);
the air inlet (051) is connected with the dust discharge port (049) through a return pipe C (0414); the return pipe C (0414) is provided with a control valve C (0415);
the exhaust outlet (052) is communicated with a return outlet (034) on the side wall of the fluidization upper bin (03) through a return pipe D (0416); the return pipe D (0416) is provided with a control valve D (0417).
5. The circulating fluidized bed of claim 1, wherein: the tail end air outlet (046) is connected with an air exhaust filter (0418).
6. The circulating fluidized bed of any one of claims 1 or 5, wherein: the tail end air outlet (046) or the air exhaust filter (0418) is connected with an air exhaust fan (0419).
7. The circulating fluidized bed of claim 1, wherein: the bottom bin (01) is communicated with a fresh air pipeline (011), and the fresh air pipeline (011) is communicated with an air heating and filtering device (013).
8. The circulating fluidized bed of claim 7, wherein: and a fresh air control valve (012) is arranged on the fresh air pipeline (011).
9. The circulating fluidized bed of claim 1, wherein: the area, close to the central air opening (044), inside the cylinder (041) is provided with a guide plate (045), the guide plate (045) is a circular flat plate, the center of the circle of the guide plate is on the central axis of the cylinder (041), and the diameter of the guide plate is larger than that of the central air opening (044).
10. The circulating fluidized bed of claim 1, wherein: the fluidization upper bin air outlet (031) is communicated with the central air outlet (044) through a central connecting pipe (032).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114198986A (en) * | 2022-01-13 | 2022-03-18 | 北京蓝鼎科创装备科技有限公司 | Circulating fluidized bed |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114198986A (en) * | 2022-01-13 | 2022-03-18 | 北京蓝鼎科创装备科技有限公司 | Circulating fluidized bed |
| CN114198986B (en) * | 2022-01-13 | 2024-07-12 | 北京蓝鼎科创装备科技有限公司 | Circulating fluidized bed |
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