Material supplementing device in operation of circulating fluidized bed

Abstract

The utility model relates to a material supplementing device in operation of a circulating fluidized bed, and belongs to the field of circulating fluidized beds. Comprising a slag bin mechanism, a limestone feeding mechanism, a slag supplementing pipe, at least one slag supplementing vibrator and a control mechanism, the slag material supplementing vibrator is arranged on the side wall of the slag material supplementing pipe, the two ends of the slag material supplementing pipe are connected with the slag bin mechanism and the limestone feeding mechanism in a one-to-one correspondence mode, and the slag material supplementing pipe is arranged in a downward inclined mode in the direction from the slag bin mechanism to the limestone feeding mechanism. And the control mechanism is connected with the slag bin mechanism, the limestone feeding mechanism and the slag supplementing vibrator. According to the utility model, bed material loss in the starting process of the circulating fluidized bed can be supplemented in time, and the temperature in the bed can be transmitted to the middle and rear heating surfaces and the tail heating surface in time; and moreover, equipment transformation is simple, investment is low, and the capacity of the circulating fluidized bed boiler for resisting energy lost by bed materials in the initial starting stage and resisting bed material pollution in the operation process is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of circulating fluidized bed, especially relates to a feeding device in the operation of circulating fluidized bed. BACKGROUND

[0002] Circulating fluidized bed is a kind of clean coal combustion technology using fluidized combustion, and the bed material quantity of circulating fluidized bed is closely related to bed temperature and load capacity.When the circulating fluidized bed boiler starts, due to the long-period operation of fuel and smoke system in the early stage of circulating fluidized bed operation during the starting process, the bed material after combustion will be blown out of the system, resulting in a large amount of bed material loss.The lack of bed material after grid connection will cause high bed temperature, difficulty in load increase, limit the rate of load increase after grid connection, and cause certain power examination for thermal power enterprises;At the same time, the bed material of circulating fluidized bed is also easily polluted in the running process due to the reasons such as large coal particle size, poor fluidization and low temperature coking.

[0003] To solve the above problems, the existing technical solution is to increase the input quantity of coal into the furnace, and the ash produced by the combustion of coal into the furnace remains in the fluidized bed, thereby increasing the bed material quantity and replacing the contaminated bed material, but such feeding method is not only low in efficiency, but also long in replacement time, and also cannot quickly feed during the operation of circulating fluidized bed. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to provide a feeding device in the operation of circulating fluidized bed to solve the above problems.

[0005] The technical solution for solving the above technical problem is as follows: a feeding device in the operation of circulating fluidized bed, comprising: a slag bin mechanism, a limestone feeding mechanism, a slag material feeding pipe, at least one slag material feeding vibrator and a control mechanism;The slag material feeding vibrator is arranged on the side wall of the slag material feeding pipe, and the two ends of the slag material feeding pipe are connected with the slag bin mechanism and the limestone feeding mechanism one by one, the slag material feeding pipe is arranged downwardly inclined from the slag bin mechanism to the limestone feeding mechanism, and the control mechanism is connected with the slag bin mechanism, the limestone feeding mechanism and the slag material feeding vibrator.

[0006] The utility model discloses beneficial effect is: through the slag material supplementing pipe of inclination setting connects slag bin mechanism and limestone feeding mechanism, is favorable in the fluidized bed operation process with the slag material of slag bin mechanism through slag material supplementing pipe is transported to the limestone feeding mechanism of circulating fluidized bed matching in, and limestone feeding mechanism as the sulphur removal environmental protection process equipment in the circulating fluidization process, this just and circulating fluidized bed connect, but in the early stage of circulating fluidized bed operation does not participate, so it is favorable in the early stage of circulating fluidized bed operation, through limestone feeding mechanism, the slag material of loss is supplemented into circulating fluidized bed, not only can improve the rate of load promotion after unit start, timely supplement the bed material loss in unit start -up process, the temperature in the bed is in time transmission to middle and rear and tail heating surface, and equipment modification is simple, and the investment is low, has improved the energy of resistance to bed material loss in the early stage of unit start -up and the ability of resistance to bed material pollution in the operation process of circulating fluidized bed boiler.

[0007] On the basis of the above technical scheme, the utility model further can make improvement as follows.

[0008] Further, the slag bin mechanism comprises: a slag bin, an elevator, a slag bin fixing frame, an accident slag discharging assembly, a wet slag discharging assembly, and a dry slag discharging pipe, the accident slag discharging assembly, the wet slag discharging assembly, and the dry slag discharging pipe are all arranged on the side wall of the slag bin, the slag bin is installed on the slag bin fixing frame, the slag bin is connected with the elevator for conveying slag into the slag bin, and one end of the slag material supplementing pipe, which is away from the limestone feeding mechanism, is in communication with the upper end of the slag bin.

[0009] The beneficial effect of the above further scheme is that the elevator is conducive to conveying slag into the slag bin fixed on the slag bin fixing frame, and the slag stored in the slag bin is discharged in dry and wet states through the wet slag discharging assembly and the dry slag discharging pipe for other uses, and the accident slag discharging assembly is conducive to the maintenance of the slag bin or the discharge of slag in the slag bin in case of an accident; one end of the slag material supplementing pipe is in communication with the upper end of the slag bin, which is conducive to conveying the slag at the upper part of the slag bin to the limestone feeding mechanism under the action of gravity.

[0010] Further, the top end of the slag bin is provided with a cloth belt dust remover, a pressure release valve, and a feeding port, a plurality of slag bin vibrators are arranged around the lower end side wall of the slag bin, the elevator is connected with the feeding port, and the control mechanism is connected with the cloth belt dust remover, the pressure release valve, and the slag bin vibrators.

[0011] The beneficial effect of the above further scheme is that the cloth belt dust remover is conducive to removing dust mixed in the slag, the pressure release valve is conducive to releasing the pressure in the slag bin to avoid explosion, and the slag bin vibrators are conducive to loosening and discharging the slag accumulated on the inner wall of the slag bin through vibration, and the connection with the control mechanism is conducive to realizing automation and remote control.

[0012] Further, the accident slag discharge assembly comprises an accident slag discharge pipe and a first manual flap door, the accident slag discharge pipe is a tubular structure arranged on the lower end side wall of the slag bin, and the first manual flap door is arranged on the accident slag discharge pipe.

[0013] The beneficial effect of the above further scheme is that the first manual flap door is beneficial to manual opening, and slag in the slag bin is discharged from the accident slag discharge pipe.

[0014] Further, the wet slag discharge assembly comprises a slag discharge pipe, a second manual flap door, a pneumatic flap door, an electric feeder and a stirrer, the slag discharge pipe is a tubular structure arranged on the lower end side wall of the slag bin, two ends of the electric feeder are respectively connected to one end of the slag discharge pipe away from the slag bin and the stirrer, the second manual flap door and the pneumatic flap door are arranged on the slag discharge pipe, and the control mechanism is connected to the pneumatic flap door, the electric feeder and the stirrer.

[0015] The beneficial effect of the above further scheme is that the second manual flap door and the pneumatic flap door are beneficial to manually or automatically conveying slag in the slag bin to the electric feeder, and conveying the slag to the stirrer through the electric feeder, and mixing the slag with liquid in the stirrer to adjust the humidity of the slag.

[0016] Further, the limestone feeding mechanism comprises a feeding conveying assembly and a feeding pipe, one end of the slag supplement pipe away from the slag bin mechanism is communicated with the feeding pipe, and the feeding pipe is connected to the feeding conveying assembly.

[0017] The beneficial effect of the above further scheme is that the feeding pipe is connected to the feeding conveying assembly, which is beneficial to inputting the slag into the original feeding conveying assembly in the limestone feeding mechanism, and using the original component conveying limestone to complete the conveying of the slag, and then supplementing the slag into the running circulating fluidized bed.

[0018] Further, the feeding conveying assembly comprises a fan, a feeding conveying pipe and a plurality of return legs, two ends of the feeding conveying pipe are respectively connected to the fan and the return legs, the return legs are connected to the circulating fluidized bed, the feeding pipe is communicated with the feeding conveying pipe, and the control mechanism is connected to the fan.

[0019] The beneficial effect of the above further scheme is that the fan is beneficial to providing power for the slag entering the feeding conveying pipe, and conveying the slag to the circulating fluidized bed through the return legs.

[0020] Further, the feeding pipe is provided with a feeding pipe pneumatic valve and a feeding pipe manual valve, and the control mechanism is connected to the feeding pipe pneumatic valve.

[0021] The beneficial effect of the above further scheme is that the feed pipe pneumatic valve and the feed pipe manual valve are beneficial to realize manual or automatic control and transport the slag in the feed pipe to the feeding conveying assembly. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 An overall structure schematic view is provided for the embodiment of the present application.

[0023] Figure 2 A slag bin mechanism structure schematic view is provided for the embodiment of the present application.

[0024] Figure 3 A limestone feeding mechanism structure schematic view is provided for the embodiment of the present application.

[0025] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0026] 1, slag bin mechanism; 2, limestone feeding mechanism; 3, slag supplement pipe; 4, slag supplement vibrator; 11, slag bin; 12, elevator; 13, slag bin fixing frame; 14, accident slag discharging assembly; 15, humidity adjusting slag discharging assembly; 16, dry slag discharging pipe; 21, feeding conveying assembly; 22, feed pipe; 111, cloth belt dust collector; 112, pressure release valve; 113, feed inlet; 114, slag bin vibrator; 141, accident slag discharging pipe; 142, first manual flap door; 151, slag discharging pipe; 152, second manual flap door; 153, pneumatic flap door; 154, electric feeder; 155, mixer; 211, fan; 212, feeding conveying pipe; 213, return leg; 221, feed pipe pneumatic valve; 222, feed pipe manual valve. DETAILED DESCRIPTION

[0027] The principle and features of the present application are described below, and the examples are only used to explain the present application and are not used to limit the scope of the present application.

[0028] As shown in Figure 1 A supplement device in a circulating fluidized bed operation, comprising: a slag bin mechanism 1, a limestone feeding mechanism 2, a slag supplement pipe 3, at least one slag supplement vibrator 4 and a control mechanism; the slag supplement vibrator 4 is arranged on the side wall of the slag supplement pipe 3, both ends of the slag supplement pipe 3 are connected with the slag bin mechanism 1 and the limestone feeding mechanism 2 one by one, the slag supplement pipe 3 is arranged in a downward inclined manner from the slag bin mechanism 1 to the limestone feeding mechanism 2, and the control mechanism is connected with the slag bin mechanism 1, the limestone feeding mechanism 2 and the slag supplement vibrator 4.

[0029] Among them, it should be noted that: in the technical solution of the present utility model, the control mechanism is a PLC (Programmable Logic Controller) or a single-chip microcomputer. The connection and control of the control mechanism with the slag bin mechanism 1, the limestone feeding mechanism 2, and the slag feeding vibrator 4 all belong to the prior art;

[0030] The slag feeding vibrator 4 is beneficial to prevent the bed material in the slag feeding pipe 3 from standing still or being blocked when the gravity is insufficient.

[0031] The beneficial effects of the present utility model are as follows: By connecting the slag bin mechanism and the limestone feeding mechanism through the inclined slag feeding pipe, it is beneficial to convey the slag in the slag bin mechanism to the limestone feeding mechanism supporting the circulating fluidized bed through the slag feeding pipe during the operation of the fluidized bed. As the limestone feeding mechanism is an equipment for the desulfurization and environmental protection process in the circulating fluidization process, it is already connected to the circulating fluidized bed but does not participate in the early stage of the operation of the circulating fluidized bed. Therefore, it is beneficial to supplement the lost slag into the circulating fluidized bed through the limestone feeding mechanism in the early stage of the operation of the circulating fluidized bed. This not only can improve the load increase rate after the unit starts, timely supplement the bed material loss during the unit startup process, and transfer the bed temperature to the middle, rear, and tail heating surfaces in a timely manner; but also the equipment modification is simple, the investment is low, and the energy resistance to the bed material loss in the initial stage of startup and the ability to resist bed material pollution during the operation of the circulating fluidized bed boiler are improved.

[0032] Preferably, as Figure 2 shown, the slag bin mechanism 1 includes: a slag bin 11, a hoist 12, a slag bin fixing frame 13, an accident slag discharging component 14, a humidified slag discharging component 15, and a dry slag discharging pipe 16. The accident slag discharging component 14, the humidified slag discharging component 15, and the dry slag discharging pipe 16 are all arranged on the side wall of the slag bin 1, the slag bin 1 is installed on the slag bin fixing frame 13, the slag bin 1 is connected to the hoist 12 that conveys the slag into the slag bin 1, and one end of the slag feeding pipe 3 far from the limestone feeding mechanism 2 is communicated with the upper end of the slag bin 1.

[0033] The beneficial effects of adopting the above preferred solution are as follows: The hoist is beneficial to convey the slag to the slag bin fixed on the slag bin fixing frame, and discharge the slag stored in the slag bin in two states of dry and wet through the humidified slag discharging component and the dry slag discharging pipe for other uses. The accident slag discharging component is beneficial to repair the slag bin or discharge the slag in the slag bin in case of an accident; One end of the slag feeding pipe is communicated with the upper end of the slag bin, which is beneficial to convey the slag at the upper part of the slag bin to the limestone feeding mechanism under the action of gravity. [[ID=​​As shown in the figure, the top end of the slag bin 11 is provided with a cloth belt dust collector 111, a pressure release valve 112 and a feeding port 113, a plurality of slag bin vibrators 114 are arranged around the lower end side wall of the slag bin 11, the elevator 12 is connected with the feeding port 113, and the control mechanism is connected with the cloth belt dust collector 111, the pressure release valve 112 and the slag bin vibrators 114.

[0035] The beneficial effects of the above preferred scheme are that the cloth belt dust collector is beneficial to remove dust mixed in the slag in the slag bin, the pressure release valve is beneficial to release the pressure in the slag bin to avoid explosion, and the slag bin vibrator is beneficial to vibrate the slag accumulated on the inner wall of the slag bin to be discharged, and the connection with the control mechanism is beneficial to realize automation and remote control.

[0036] Preferably, as shown in the figure, Figure 2 As shown in the figure, the accident slag discharge assembly 14 includes an accident slag discharge pipe 141 and a first manual flap door 142, the accident slag discharge pipe 141 is a tubular structure arranged on the lower end side wall of the slag bin 11, and the first manual flap door 142 is arranged on the accident slag discharge pipe 141.

[0037] The beneficial effects of the above preferred scheme are that the first manual flap door is beneficial to manually open and discharge the slag in the slag bin from the accident slag discharge pipe.

[0038] Preferably, as shown in the figure, Figure 2 As shown in the figure, the wet slag discharge assembly 15 includes a slag discharge pipe 151, a second manual flap door 152, a pneumatic flap door 153, an electric feeder 154 and a mixer 155, the slag discharge pipe 151 is a tubular structure arranged on the lower end side wall of the slag bin 11, two ends of the electric feeder 154 are connected with one end of the slag discharge pipe 151 away from the slag bin 11 and the mixer 155, the second manual flap door 152 and the pneumatic flap door 153 are arranged on the slag discharge pipe 151, and the control mechanism is connected with the pneumatic flap door 153, the electric feeder 154 and the mixer 155.

[0039] The beneficial effects of the above preferred scheme are that the second manual flap door and the pneumatic flap door are beneficial to manually or automatically transport the slag in the slag bin to the electric feeder, and then to the mixer through the electric feeder, and mix with the liquid in the mixer to adjust the humidity of the slag.

[0040] Preferably, as shown in the figure, Figure 3 As shown in the figure, the limestone feeding mechanism 2 includes a feeding conveying assembly 21 and a feeding pipe 22, one end of the slag feeding pipe 3 away from the slag bin mechanism 1 is communicated with the feeding pipe 22, and the feeding pipe 22 is connected with the feeding conveying assembly 21.

[0041] It should be noted that in the technical scheme of the utility model, the feeding and conveying assembly 21 is an emergency feeding part in the limestone feeding mechanism 2, and since the limestone feeding mechanism 2 is prior art, other parts thereof are not described in detail.

[0042] The above preferred scheme has the beneficial effect that the feeding pipe is connected with the feeding and conveying assembly, which is conducive to feeding the slag into the original feeding and conveying assembly in the limestone feeding mechanism, and using the original component for conveying the limestone to complete the conveying of the slag, and then supplementing the slag into the running circulating fluidized bed.

[0043] Preferably, as shown in the figure, the feeding and conveying assembly 21 comprises a fan 211, a feeding and conveying pipe 212 and a plurality of return legs 213, both ends of the feeding and conveying pipe 212 are connected with the fan 211 and the return legs 213 one by one, the return legs 213 are connected with the circulating fluidized bed, the feeding pipe 22 is in communication with the feeding and conveying pipe 212, and the control mechanism is connected with the fan 211. Figure 3

[0044] The above preferred scheme has the beneficial effect that the fan is conducive to providing power for the slag entering the feeding and conveying pipe, and conveying the slag to the circulating fluidized bed through the return legs.

[0045] Preferably, as shown in the figure, the feeding pipe 22 is provided with a feeding pipe pneumatic valve 221 and a feeding pipe manual valve 222, and the control mechanism is connected with the feeding pipe pneumatic valve 221. Figure 3

[0046] It should be noted that the feeding pipe pneumatic valve 221 and the feeding pipe manual valve 222 are used alternatively, that is, when the feeding pipe pneumatic valve 221 is used, the feeding pipe manual valve 222 is in an open state, and when the feeding pipe manual valve 222 is used, the feeding pipe pneumatic valve 221 is in an open state, so as to avoid that the slag is blocked by the feeding pipe pneumatic valve 221 and the feeding pipe manual valve 222 at the same time.

[0047] The above preferred scheme has the beneficial effect that the feeding pipe pneumatic valve and the feeding pipe manual valve are conducive to realizing manual or automatic control, and conveying the slag in the feeding pipe to the feeding and conveying assembly.

[0048] ​​In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0049] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0050] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0051] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0053] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A means for feeding in a circulating fluidized bed operation, characterized in that, The application relates to a lime sludge feeding device, which comprises a sludge bin mechanism (1), a limestone feeding mechanism (2), a sludge feeding pipe (3), at least one sludge feeding vibrator (4) and a control mechanism; the sludge feeding vibrator (4) is arranged on the side wall of the sludge feeding pipe (3), the two ends of the sludge feeding pipe (3) are connected with the sludge bin mechanism (1) and the limestone feeding mechanism (2) respectively, the sludge feeding pipe (3) is arranged in a downwardly inclined manner from the sludge bin mechanism (1) to the limestone feeding mechanism (2), and the control mechanism is connected with the sludge bin mechanism (1), the limestone feeding mechanism (2) and the sludge feeding vibrator (4). The sludge bin mechanism (1) comprises a sludge bin (11), an elevator (12), a sludge bin fixing frame (13), an emergency sludge discharging assembly (14), a wet sludge discharging assembly (15) and a dry sludge discharging pipe (16), the emergency sludge discharging assembly (14), the wet sludge discharging assembly (15) and the dry sludge discharging pipe (16) are arranged on the side wall of the sludge bin (11), the sludge bin (11) is installed on the sludge bin fixing frame (13), the sludge bin (11) is connected with the elevator (12) for conveying sludge into the sludge bin (11), and the end, away from the limestone feeding mechanism (2), of the sludge feeding pipe (3) is communicated with the upper end of the sludge bin (11).

2. A feed supplementing device in a circulating fluidized bed operation according to claim 1, characterized in that, The top end of the sludge bin (11) is provided with a cloth belt dust remover (111), a pressure release valve (112) and a feeding port (113), a plurality of sludge bin vibrators (114) are arranged on the lower end side wall of the sludge bin (11), the elevator (12) is connected with the feeding port (113), and the control mechanism is connected with the cloth belt dust remover (111), the pressure release valve (112) and the sludge bin vibrators (114).

3. A feed supplementing device in a circulating fluidized bed operation according to claim 2, characterized in that, The emergency sludge discharging assembly (14) comprises an emergency sludge discharging pipe (141) and a first manual flap door (142), the emergency sludge discharging pipe (141) is a tubular structure arranged on the lower end side wall of the sludge bin (11), and the first manual flap door (142) is arranged on the emergency sludge discharging pipe (141).

4. A feed supplementing device in a circulating fluidized bed operation according to claim 2, characterized in that, The wet sludge discharging assembly (15) comprises a sludge discharging pipe (151), a second manual flap door (152), a pneumatic flap door (153), an electric feeder (154) and a mixer (155), the sludge discharging pipe (151) is a tubular structure arranged on the lower end side wall of the sludge bin (11), the two ends of the electric feeder (154) are connected with one end of the sludge discharging pipe (151), away from the sludge bin (11), and the mixer (155) respectively, the second manual flap door (152) and the pneumatic flap door (153) are arranged on the sludge discharging pipe (151), and the control mechanism is connected with the pneumatic flap door (153), the electric feeder (154) and the mixer (155).

5. A feed supplementing device in a circulating fluidized bed operation according to claim 2, characterized in that, ​ 6. A feed supplementing device in a circulating fluidized bed operation according to claim 1, characterized in that, The limestone feeding mechanism (2) comprises a feeding conveying assembly (21) and a feeding pipe (22), one end of the slag feeding pipe (3) is communicated with the feeding pipe (22) away from the slag bin mechanism (1), and the feeding pipe (22) is connected with the feeding conveying assembly (21).

7. A feed supplementing device in a circulating fluidized bed operation according to claim 6, characterized in that, The feeding conveying assembly (21) comprises a fan (211), a feeding conveying pipe (212) and a plurality of return legs (213), two ends of the feeding conveying pipe (212) are connected with the fan (211) and the return legs (213) one by one, the return legs (213) are connected with a circulating fluidized bed, the feeding pipe (22) is communicated with the feeding conveying pipe (212), and the control mechanism is connected with the fan (211).

8. A feed supplementing device in a circulating fluidized bed operation according to claim 6, characterized in that, The feeding pipe (22) is provided with a feeding pipe pneumatic valve (221) and a feeding pipe manual valve (222), and the control mechanism is connected with the feeding pipe pneumatic valve (221).

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