Slag bed material conveying system

Abstract

The utility model discloses a furnace slag bed material conveying system, which comprises a slag material sorting mechanism, a slag material conveying mechanism and a slag material conveying mechanism, the pneumatic ash conveying mechanism comprises an ash storage device and an ash blowing device, and the ash storage device is connected with the slag material sorting mechanism and used for receiving bed materials obtained through sorting of the slag material sorting mechanism; the ash blowing device is communicated with the ash storage device and the air source pipeline, and is used for blowing the interior of the ash storage device and sending out the bed material in the ash storage device; and the discharging mechanism is connected with the pneumatic ash conveying mechanism and the fluidized bed boiler and is used for conveying the bed material output by the pneumatic ash conveying mechanism into the fluidized bed boiler. The utility model has the beneficial effects that the pipeline is used for horizontal conveying without material blockage, conveying corners and low-point to high-point conveying, the conveying is smooth without material blockage, and the continuous conveying can be realized; the blowing assisting mechanism is additionally arranged, gas can be conveyed into the conveying pipe at multiple points, the conveying time is shortened, and the conveying efficiency is improved; the pipeline is used for replacing a scraper, and the cost is reduced by at least two times.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of slag utilization, and relates to a slag bed material conveying system, in particular to a slag bed material conveying system suitable for power stations, cement plants and steel plants and capable of realizing no conveying dead angle, no easy blocking and low cost during conveying of the fluidized bed boiler. BACKGROUND

[0002] The circulating fluidized bed boiler (CFB) has the characteristics of high fuel utilization and wide fuel adaptability, is widely used in the field of cogeneration, and is especially used in the field of solid waste incineration. The fluidized bed in the field of solid waste incineration cannot meet the requirement for the circulating ash amount during normal operation of the circulating fluidized bed boiler due to the low comprehensive ash content of the fuel. While the boiler continuously discharges slag, a large amount of fine particle bed material needs to be continuously supplied to maintain good fluidization of the bed layer, control and adjust the bed temperature and maintain the boiler bed pressure.

[0003] There are two kinds of existing bed material supplement systems. One is to manually add bed material to the bottom of the furnace, which has high labor intensity and long time, and cannot meet the requirement for supplementing material during operation. The other is to use a belt conveying mode to return to the furnace as bed material. For example, patent 202122188434.7 discloses a CFB boiler bed material recycling system, which comprises a CFB boiler, a vibrating screen, a slag cooler arranged from left to right, a scraper and a conveying pipeline. The slag cooler is connected with one end of the vibrating screen through the scraper. The other end of the vibrating screen is provided with a rotary feeder. The rotary feeder is connected with the conveying pipeline. The conveying pipeline inlet is provided with a Roots blower. The conveying pipeline outlet is communicated with the furnace wall of the CFB boiler. Although the above system reduces the labor intensity and labor time of the operator, a special scraper needs to be configured, the cost of the scraper is high, the equipment cost is greatly increased, and the conveying pipeline is long and easy to be blocked. SUMMARY

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the utility model is to provide a slag bed material conveying system, which solves the problems of no conveying dead angle, no easy blocking and low cost during conveying of the existing fluidized bed boiler.

[0005] To solve the above problems, the technical scheme adopted by the utility model is as follows:

[0006] The slag bed material conveying system comprises:

[0007] The slag material sorting mechanism is used for sorting the original slag material.

[0008] The pneumatic ash conveying mechanism comprises an ash storage device and an ash blowing device, the ash storage device is connected with the slag sorting mechanism and used for receiving the bed material sorted by the slag sorting mechanism; the ash blowing device is in communication with the ash storage device and a gas source pipeline and used for blowing the inside of the ash storage device and sending the bed material in the ash storage device out; and

[0009] The discharge mechanism is connected with the pneumatic ash conveying mechanism and the fluidized bed boiler and used for sending the bed material output by the pneumatic ash conveying mechanism into the fluidized bed boiler.

[0010] Preferably, the slag sorting mechanism comprises a sorting bin and a buffer bin connected in sequence, the sorting bin is arranged at the slag pool platform and above the buffer bin, the sorting bin is connected with the original slag pool through the slag inlet pipe group, the inner cavity of the sorting bin is separated into an upper slag cavity and a lower bed material cavity by a sorting component, a slag discharge port in communication with the upper slag cavity is arranged on the bin wall of the sorting bin, and an ash outlet in communication with the lower bed material cavity is arranged at the bottom of the sorting bin; the inlet of the buffer bin is in communication with the ash outlet of the sorting bin, the outlet of the buffer bin is connected with the ash storage device, and a manual flashboard valve is arranged at the ash outlet of the buffer bin.

[0011] Preferably, the slag inlet pipe group comprises a first slag inlet pipe, a first pneumatic valve and a second slag inlet pipe connected in sequence, the upper end of the first slag inlet pipe extends to the drop port of the elevator, and the second slag inlet pipe is connected with the sorting bin; the slag inlet pipe group further comprises a slag distribution pipe and a second pneumatic valve arranged on the slag distribution pipe, and the first slag inlet pipe is connected with the original slag pool through the slag distribution pipe.

[0012] Preferably, the ash storage device comprises a bin pump, the bin pump is arranged at the extended sunken platform below the slag sorting mechanism, the top of the bin pump is provided with an upper blowing port, an upper ash inlet port and an upper ash outlet port, the bottom of the bin pump is provided with a lower blowing port and a lower ash outlet port, the upper blowing port and the lower blowing port are connected with the ash blowing device respectively, the upper ash inlet port is connected with the outlet of the buffer bin through a first telescopic joint and a third pneumatic valve, the upper ash outlet port is connected with the top of the original slag pool, and the lower ash outlet port is connected with the discharge mechanism.

[0013] Preferably, the ash blowing device comprises an air compressor, a main gas conveying pipe, an upper gas conveying branch pipe, a lower gas conveying branch pipe and a control box, one end of the main gas conveying pipe is connected with the air compressor, the other end is connected with the upper gas conveying branch pipe and the lower gas conveying branch pipe respectively, and the main gas conveying pipe, the upper gas conveying branch pipe and the lower gas conveying branch pipe are all provided with a control valve group; the control box group is electrically connected with the control valve group and used for controlling the on-off of the pipeline and the flow of the gas in the pipeline.

[0014] Preferably, the ash blowing device further comprises two pressure transmitters, and the two pressure transmitters are connected with the main gas conveying pipe and the bin pump respectively.

[0015] Preferably, the discharging mechanism comprises a conveying pipe, which has an inlet, a feeding port and a plurality of conveying ports arranged along the length of the conveying pipe downstream of the feeding port, the inlet is connected with the lower outlet pipe of the bin pump, the feeding port is connected with the top of the original slag tank through a pipe, and the conveying ports are connected with the fluidized bed boiler through conveying pipe units.

[0016] Preferably, the conveying pipe is in a horizontal state, facilitating horizontal conveying of the bed material and avoiding blockage.

[0017] Preferably, the conveying pipe unit comprises a conveying elbow, a fourth pneumatic valve, a buffer pipe, a high-temperature-resistant expansion joint and a conveying communication pipe connected in sequence, the inlet end of the conveying elbow is connected with the conveying port, and the outlet end of the conveying communication pipe is connected with the fluidized bed boiler.

[0018] Preferably, the pneumatic conveying mechanism further comprises a blowing assisting mechanism for providing gas into the conveying pipe to drive the conveying of the bed material in the conveying pipe.

[0019] Preferably, the blowing assisting mechanism is connected with the main gas conveying pipe and the conveying pipe, and comprises a blowing assisting gas conveying pipe connected with the main gas conveying pipe, a plurality of control valves are arranged between the blowing assisting gas conveying pipe and the conveying pipe.

[0020] Preferably, the buffer bin and the bin pump are both provided with a level meter.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] 1. The pipeline is horizontally conveyed, and blockage is avoided, the design is without corner and low point, and the conveying is smooth and continuous.

[0023] 2. The blowing assisting mechanism is additionally arranged, gas in the conveying pipe can be supplied from multiple points, conveying time is reduced, and conveying efficiency is improved.

[0024] 3. The pipeline is used to replace the scraper, and the cost is reduced by at least 2 times. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structural schematic view of the utility model.

[0026] Figure 2 It is a structural schematic view of the slag sorting mechanism of the utility model.

[0027] Figure 3 It is a structural schematic view of the pneumatic conveying mechanism of the utility model.

[0028] Figure 4 It is a structural schematic view of the conveying pipe unit of the utility model.

[0029] In the drawings:

[0030] 1 - Slag sorting mechanism; 11 - Sorting bin; 111 - Upper slag cavity; 112 - Lower bed material cavity; 12 - Buffer bin; 121 - Manual flap valve; 13 - Slag inlet pipe group; 131 - First slag inlet pipe; 132 - First pneumatic valve; 133 - Second slag inlet pipe; 134 - Slag distribution pipe; 135 - Second pneumatic valve;

[0031] 2 - Pneumatic ash conveying mechanism; 21 - Ash storage device; 211 - Bin pump; 212 - Expansion joint; 213 - Third pneumatic valve; 22 - Ash blowing device; 221 - Air compressor; 222 - Main air conveying pipe; 223 - Upper air conveying branch pipe; 224 - Lower air conveying branch pipe; 225 - Control box; 226 - Pressure transmitter; 23 - Ash blowing assisting mechanism; 231 - Ash blowing assisting air conveying pipe; 24 - Check valve; 25 - Stop valve; 26 - Flow regulating valve;

[0032] 3 - Discharge mechanism; 31 - Ash conveying pipe; 32 - Ash conveying pipeline unit; 321 - Ash conveying elbow; 322 - Fourth pneumatic valve; 323 - Buffer pipe; 324 - High-temperature-resistant expansion joint; 325 - Ash conveying communication pipe;

[0033] 4 - Fluidized bed boiler;

[0034] 5 - Raw slag storage;

[0035] 6 - Level meter;

[0036] 7 - Ball valve;

[0037] 8 - Hoist discharge port;

[0038] 9 - Slag storage platform;

[0039] 10 - Plant compressed air main pipe. DETAILED DESCRIPTION

[0040] The specific embodiments of the present application are described below by way of specific examples, and other advantages and effects of the present application can be easily understood by those skilled in the art from the disclosure of the present specification. The present application can also be implemented or applied by other different specific embodiments, and various modifications or changes can be made to the details in the present specification based on different viewpoints and applications without departing from the spirit of the present application.

[0041] It should be noted that the process equipment or devices not specifically mentioned in the following examples are all conventional equipment or devices in the art.

[0042] Furthermore, it should be understood that the steps of the methodologies recited in this application do not require the steps to be performed in the exact order disclosed unless otherwise specified; also, it should be understood that the combination of one or more devices recited in this application does not require the devices to be physically combined unless otherwise specified. Moreover, unless otherwise specified, the numbering of the steps of the methodologies is merely a convenient mechanism for distinguishing between the steps and does not require the steps to be performed in the exact order disclosed, nor does it limit the scope of the application to only those embodiments that can be practiced using the exact order disclosed. Alterations or modifications to the relative arrangement of the steps, when such alterations or modifications do not materially alter the technical content of the application, are deemed to be within the scope of the application.

[0043] Embodiments of the present application are described in detail below with reference to the attached drawing figures, wherein the same or like reference numerals and characters throughout the figures denote the same elements or elements with the same functions. The embodiments described below are only used to explain the present application and are not intended to limit the present application.

[0044] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "inner", "outer", "axial", "circumferential" and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0045] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; 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 inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "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 exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The present application will be further described below in conjunction with specific embodiments, but the protection scope of the present application is not limited thereto.

[0048] As shown in Figures 1-4 The slag bed material conveying system comprises:

[0049] The slag sorting mechanism 1 is used for sorting the original slag material;

[0050] The pneumatic ash conveying mechanism 2 comprises an ash storage device 21 and an ash blowing device 22, the ash storage device 21 is connected with the slag sorting mechanism 1 and used for receiving the bed material obtained by the slag sorting mechanism 1, the ash blowing device 22 is in communication with the ash storage device 21 and an air source pipeline, and is used for blowing the inside of the ash storage device 21 and sending the bed material in the ash storage device 21 out; and

[0051] The discharge mechanism 3 is connected with the pneumatic ash conveying mechanism 2 and the fluidized bed boiler 4, and is used for sending the bed material output by the pneumatic ash conveying mechanism 2 into the fluidized bed boiler 4.

[0052] As shown in Figure 1 and Figure 2 The slag sorting mechanism 1 comprises a sorting bin 11 and a buffer bin 12 connected in sequence, the sorting bin 11 is arranged at the slag storage platform 9 (28m high) and located above the buffer bin 12, the sorting bin 11 is connected with the original slag storage 5 through the slag inlet pipe group 13, the inner cavity of the sorting bin 11 is separated into an upper slag material cavity 111 and a lower bed material cavity 112 by a sorting component, a slag discharge port 113 for discharging slag is arranged on the bin wall of the sorting bin 11 and in communication with the upper slag material cavity 111, an ash outlet is arranged at the bottom of the sorting bin 11 and in communication with the lower bed material cavity 112, the inlet of the buffer bin 12 is in communication with the ash outlet of the sorting bin 11, the outlet of the buffer bin 12 is connected with the ash storage device 21, and a manual flap valve 121 is arranged at the ash outlet of the buffer bin 12.

[0053] As shown in Figure 2As shown in the drawings, the slag inlet pipe group 13 comprises a first slag inlet pipe 131, a first pneumatic valve 132 and a second slag inlet pipe 133 connected in sequence, the upper end of the first slag inlet pipe 131 extends to the position of the hoist discharge port 8, and the second slag inlet pipe 133 is connected to the sorting bin 11; the slag inlet pipe group 13 further comprises a slag distribution pipe 134 and a second pneumatic valve 135 arranged on the slag distribution pipe 134, and the first slag inlet pipe 131 is connected to the original slag storage 5 through the slag distribution pipe 134.

[0054] As shown in the drawings, Figure 1 and Figure 3 The ash storage device 21 comprises a bin pump 211 arranged at the extended subsidence platform (16m high) below the slag sorting mechanism 1, the top of the bin pump 211 is provided with an upper blowing port, an upper ash inlet port and an upper ash outlet port, the bottom of the bin pump 211 is provided with a lower blowing port and a lower ash outlet port, the upper blowing port and the lower blowing port are connected with the ash blowing device 22 respectively, and the upper ash inlet port is connected with the outlet of the buffer bin 12 through a first telescopic joint 212 and a third pneumatic valve 213; the upper ash outlet port is connected to the top of the original slag storage 5, and the lower ash outlet port is connected to the discharge mechanism 3.

[0055] As shown in the drawings, Figure 1 and Figure 4 The ash blowing device 22 comprises an air compressor 221, a main gas supply pipe 222, an upper gas supply branch pipe 223, a lower gas supply branch pipe 224 and a control box 225, the air inlet end of the air compressor 221 is connected with the plant compressed air main pipe 10; one end of the main gas supply pipe 222 is connected with the air compressor 221, and the other end is connected with the upper gas supply branch pipe 223 and the lower gas supply branch pipe 224 respectively, and the main gas supply pipe 222, the upper gas supply branch pipe 223 and the lower gas supply branch pipe 224 are all provided with a control valve group; the control box 225 is electrically connected with the control valve group for controlling the on-off of the pipeline and the flow of the gas in the pipeline.

[0056] As shown in the drawings, Figure 1 and Figure 3 The ash blowing device 22 further comprises two pressure transmitters 226, and the two pressure transmitters 226 are connected with the main gas supply pipe 222 and the bin pump 211 respectively.

[0057] As shown in the drawings, Figure 1 and Figure 4 The discharge mechanism 3 comprises an ash conveying pipe 31, the ash conveying pipe 31 has an ash inlet port, a feeding port and a plurality of ash outlet ports arranged downstream of the slag conveying port and along the length direction of the ash conveying pipe 31, the ash inlet port is connected with the pipeline of the lower ash outlet port of the bin pump 211; the feeding port is connected to the top of the original slag storage 5 through the pipeline; and the ash outlet ports are connected to the fluidized bed boiler 4 through the ash conveying pipeline unit 32.

[0058] As shown in the drawings, Figure 4As shown, the ash conveying pipeline unit 32 comprises sequentially connected ash conveying elbow 321, fourth pneumatic valve 322, buffer pipe 323, high-temperature-resistant expansion joint 324 and ash conveying communication pipe 325, the inlet end of the ash conveying elbow 321 is connected with the ash conveying port, and the outlet end of the ash conveying communication pipe 325 is connected with the fluidized bed boiler 4.

[0059] As shown in Figure 1 and Figure 3 As shown, the pneumatic ash conveying mechanism 2 further comprises a secondary air blowing mechanism 23 for providing gas into the ash conveying pipe 31 to drive the conveying of the bed material in the ash conveying pipe 31.

[0060] As shown in Figure 3 , the secondary air blowing mechanism 23 is connected with the main air conveying pipe 222 and the ash conveying pipe 31, and comprises a secondary air conveying pipe 231 connected with the main air conveying pipe 222, and a control valve group connected between the secondary air conveying pipe 231 and the ash conveying pipe 31.

[0061] As shown in Figure 3 , the control valve group at least comprises a check valve 24.

[0062] As shown in Figure 3 , the control valve group further comprises a stop valve 25. Specifically, the control valve group on the upper air conveying branch pipe, and the control valve group between the secondary air conveying pipe and the ash conveying pipe are of the same type, and both comprise a stop valve and a check valve.

[0063] As shown in Figure 3 , the control valve group further comprises a flow regulating valve 26. Specifically, the control valve group on the lower air conveying branch pipe comprises a flow regulating valve and a check valve.

[0064] As shown in Figure 1 and Figure 2 , the buffer bin 12 and the bin pump 211 are both provided with a level meter 6.

[0065] As shown in Figure 1 and Figure 3 , a ball valve 7 is arranged on the pipeline between the ash conveying pipe 31 and the original slag bin 5, the main air conveying pipe 222 and the secondary air conveying pipe 231.

[0066] The above examples are to illustrate the embodiments disclosed by the present application, and cannot be understood as a limitation of the present application. In addition, various modifications listed herein and changes in the method and composition of the present application are obvious to those skilled in the art without departing from the scope and spirit of the present application. Although the present application has been specifically described in combination with various specific preferred embodiments of the present application, it should be understood that the present application should not be limited to these specific embodiments. In fact, various modifications as described above to obtain the present application are obvious to those skilled in the art and should be included in the scope of the present application.

Claims

1. A slag bed conveying system, characterized in that, include: The slag sorting mechanism (1) is used to sort the raw slag. The pneumatic ash conveying mechanism (2) includes an ash storage device (21) and a soot blowing device (22). The ash storage device (21) is connected to the slag sorting mechanism (1) and is used to receive the bed material obtained by the slag sorting mechanism (1). The soot blowing device (22) is connected to the ash storage device (21) and the air source pipeline and is used to blow the inside of the ash storage device (21) and send out the bed material in the ash storage device (21). as well as The discharge mechanism (3) is connected to the pneumatic ash conveying mechanism (2) and the fluidized bed boiler (4) and is used to send the bed material output by the pneumatic ash conveying mechanism (2) into the fluidized bed boiler (4).

2. The slag bed conveying system according to claim 1, characterized in that: The slag sorting mechanism (1) includes a sorting bin (11) and a buffer bin (12) connected in sequence. The sorting bin (11) is located at the slag storage platform and above the buffer bin (12). The sorting bin (11) is connected to the original slag storage (5) through a slag inlet pipe group (13). The inner cavity of the sorting bin (11) is divided into an upper slag chamber (111) and a lower bed material chamber (112) by a sorting component. The bin wall of the sorting bin (11) is provided with a slag discharge port (113) that communicates with the upper slag chamber (111). The bottom of the sorting bin (11) is provided with an ash outlet that communicates with the lower bed material chamber (112). The inlet of the buffer bin (12) is connected to the ash outlet of the sorting bin (11). The outlet of the buffer bin (12) is connected to the ash storage device (21). The ash outlet of the buffer bin (12) is provided with a manual slide valve (121).

3. The slag bed conveying system according to claim 2, characterized in that: The slag inlet pipe assembly (13) includes a first slag inlet pipe (131), a first pneumatic valve (132), and a second slag inlet pipe (133) connected in sequence. The upper end of the first slag inlet pipe (131) extends to the discharge port of the elevator, and the second slag inlet pipe (133) is connected to the sorting bin (11). The slag inlet pipe assembly (13) also includes a slag distribution pipe (134) and a second pneumatic valve (135) installed on the slag distribution pipe (134). The first slag inlet pipe (131) is connected to the raw slag storage (5) through the slag distribution pipe (134).

4. The slag bed conveying system according to claim 2, characterized in that: The ash storage device (21) includes a silo pump (211), which is located at the extended sinking platform below the slag sorting mechanism (1). The top of the silo pump (211) is provided with an upper sweeping port, an upper ash inlet, and an upper ash delivery port. The bottom of the silo pump (211) is provided with a lower sweeping port and a lower ash outlet. The upper sweeping port and the lower sweeping port are respectively connected to the ash blowing device (22). The upper ash inlet is connected to the outlet of the buffer silo (12) through a telescopic joint (212) and a third pneumatic valve (213). The upper ash delivery port is connected to the top of the original slag silo (5), and the lower ash outlet is connected to the discharge mechanism (3).

5. The slag bed conveying system according to claim 1, characterized in that: The soot blowing device (22) includes an air compressor (221), a main air supply pipe (222), an upper air supply branch pipe (223), a lower air supply branch pipe (224), and a control box (225). One end of the main air supply pipe (222) is connected to the air compressor (221), and the other end is connected to the upper air supply branch pipe (223) and the lower air supply branch pipe (224) respectively. The main air supply pipe (222), the upper air supply branch pipe (223), and the lower air supply branch pipe (224) are all equipped with control valve groups. The control box (225) is electrically connected to the control valves and is used to control the opening and closing of the pipeline and the flow rate of the gas in the pipeline.

6. The slag bed conveying system according to claim 5, characterized in that: The soot blowing device (22) also includes two pressure transmitters (226), which are respectively connected to the main air supply pipe (222) and the silo pump (211).

7. The slag bed conveying system according to claim 4, characterized in that: The discharge mechanism (3) includes an ash conveying pipe (31), which has an ash inlet, a feeding port and several ash feeding ports located downstream of the slag feeding port and arranged along the length of the ash conveying pipe (31). The ash inlet is connected to the lower ash outlet pipeline of the silo pump (211). The feeding port is connected to the top of the raw slag silo (5) through a pipeline. The ash feeding port is connected to the fluidized bed boiler (4) through the ash feeding pipeline unit (32).

8. The slag bed conveying system according to claim 7, characterized in that: The ash delivery pipeline unit (32) includes an ash delivery bend (321), a fourth pneumatic valve (322), a buffer pipe (323), a high-temperature expansion joint (324), and an ash delivery connecting pipe (325) connected in sequence. The inlet end of the ash delivery bend (321) is connected to the ash delivery port, and the outlet end of the ash delivery connecting pipe (325) is connected to the fluidized bed boiler (4).

9. The slag bed conveying system according to claim 7, characterized in that, The pneumatic ash conveying mechanism (2) also includes an auxiliary blowing mechanism (23) for supplying gas into the ash conveying pipe (31) to drive the conveying of bed material in the ash conveying pipe (31).

10. The slag bed conveying system according to claim 9, characterized in that: The blowing mechanism (23) is connected to the main air supply pipe (222) and the ash conveying pipe (31), including the blowing air delivery pipe (231) connected to the main air supply pipe (222), and an array of control valves is connected between the blowing air delivery pipe (231) and the ash conveying pipe (31).

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