Ash conveying system for the bottom of a waste boiler

Abstract

The utility model discloses a kind of garbage boiler bottom ash conveying systems, including chain plate conveyor, further including fine ash water-cooled ash conveying path, coarse ash water-cooled ash conveying path;Fine ash water-cooled ash conveying path and coarse ash water-cooled ash conveying path all include the ash collecting hopper, conveying pipeline, No. 1 spout pipe, water-cooled screw ash conveying machine and No. 2 spout pipe connected in sequence, fine ash water-cooled ash conveying path conveys fine ash, the ash collecting hopper below of coarse ash water-cooled ash conveying path is provided with mill, after coarse ash is broken, it is conveyed, the outlet of No. 2 spout pipe is set above the input end of chain plate conveyor, the output end of chain plate conveyor is provided with bucket elevator unit, the water inlet of water-cooled screw ash conveying machine is connected with cold slag water system through water inlet pipeline, the water outlet of water-cooled screw ash conveying machine is connected with deaerator system through water outlet pipeline. Coarse ash is broken after coarse ash water-cooled ash conveying path cooling, can effectively improve the thermal conductivity of coarse ash, coarse ash and fine ash are separated and conveyed cooling, can effectively solve the problem of coarse ash cooling insufficient.

Description

Technical Field

[0001] This utility model relates to the field of waste boiler technology, specifically to a waste boiler bottom ash conveying system. Background Technology

[0002] Although the initial investment in solid waste incineration is slightly higher for waste-to-energy boilers, they offer irreplaceable advantages, particularly in reducing the amount of solid waste. The ash from waste-to-energy boilers contains a significant amount of heat. During the ash transport process, cooling treatment is typically required. This not only allows for the recycling of the heat in the ash but also prevents damage to boiler components from the heat in the ash.

[0003] Furnace ash comprises coarse ash and fine ash. Coarse ash has a larger particle size, typically above 1 mm, with a relatively loose and porous structure and low thermal conductivity. Fine ash has a smaller particle size, often below 1 mm, and higher thermal conductivity. During the ash transport process, coarse and fine ash are usually introduced into the water-cooled cooling unit together. Due to the difference in thermal conductivity, the fine ash has a better cooling effect, while the coarse ash has a poorer cooling effect. The mixing of coarse and fine ash means that the coarse ash is not adequately cooled before exiting the water-cooled cooling unit. Utility Model Content

[0004] The purpose of this utility model is to provide a new type of ash conveying system at the bottom of a waste boiler, addressing the aforementioned problems in the existing technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A waste boiler bottom ash conveying system includes a chain conveyor, a fine ash water-cooled conveying path, and a coarse ash water-cooled conveying path. Both the fine and coarse ash water-cooled conveying paths include an ash collection hopper, a conveying pipeline, a first chute, a water-cooled spiral conveyor, and a second chute. The inlet of the ash collection hopper in the fine ash water-cooled conveying path is connected to the fine ash outlet of the ash hopper at the bottom of the boiler. The inlet of the ash collection hopper in the coarse ash water-cooled conveying path is connected to the coarse slag outlet at the bottom of the boiler, and the outlet of the ash collection hopper is connected to the inlet of the conveying pipeline. An electric gate valve is installed on the pipeline. The outlet of the conveying pipeline is connected to the inlet of the No. 1 chute. The outlet of the No. 1 chute is connected to the ash inlet of the water-cooled screw conveyor. The ash outlet of the water-cooled screw conveyor is connected to the inlet of the No. 2 chute. The outlet of the No. 2 chute is located above the input end of the chain conveyor. The output end of the chain conveyor is equipped with a bucket elevator unit. The water inlet of the water-cooled screw conveyor is connected to the cold slag water system through the water inlet pipe. The water outlet of the water-cooled screw conveyor is connected to the deaerator system through the water outlet pipe.

[0007] The outlet of the ash collection hopper in the coarse ash water-cooled conveying ash path is connected to the inlet of the slag mill, the outlet of the slag mill is connected to the inlet of the conveying pipe in the coarse ash water-cooled conveying ash path, and the slag mill is connected to the control cabinet.

[0008] An electric gate valve is installed on the conveying pipeline, and the electric gate valve is connected to the control cabinet.

[0009] The inlet end of the water inlet pipe is connected to the outlet end of the manual main valve, and the inlet end of the manual main valve is connected to the cold slag water system through a pipe; the water inlet pipe is sequentially equipped with a No. 1 manual valve, an electric regulating valve and a No. 2 manual valve along the water inlet direction, and the electric regulating valve is connected to the control cabinet; the outlet pipe is equipped with a No. 3 manual valve.

[0010] A pressure sensor is installed on the water inlet pipe, and the pressure sensor is connected to the control cabinet.

[0011] A flow sensor is installed on the water outlet pipe, and the flow sensor is connected to the control cabinet.

[0012] Temperature sensor No. 1 is installed on the water inlet pipe, and temperature sensor No. 2 is installed on the water outlet pipe. Temperature sensors No. 1 and No. 2 are respectively connected to the control cabinet.

[0013] The water-cooled spiral conveyor is connected to the No. 1 variable frequency motor, the chain conveyor is connected to the No. 2 variable frequency motor, and the No. 1 and No. 2 variable frequency motors are respectively connected to the control cabinet.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. This utility model solves the problem of insufficient cooling of coarse ash during mixed transport by setting up water-cooled conveying paths for fine ash and coarse ash respectively to cool the fine ash and coarse ash during the transport process, thus avoiding the problem of insufficient cooling of coarse ash during mixed transport of coarse and fine ash.

[0016] 2. When the coarse ash enters the coarse ash water-cooled conveying ash path, it is first crushed. The crushed coarse ash has better thermal conductivity than the uncrushed coarse ash, which improves the cooling efficiency of the coarse ash. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Among them, 1~ fine ash water-cooled conveying ash path, 2~ coarse ash water-cooled conveying ash path, 3~ chain plate conveyor, 4~ manual main valve, 5~ control cabinet, 6~ No. 2 variable frequency motor. 101~First ash hopper, 102~First conveying pipe, 103~First fine ash chute, 104~First water-cooled screw conveyor, 105~Second fine ash chute, 106~First water inlet pipe, 107~First water outlet pipe, 108~First electric gate valve, 109~First fine ash manual valve, 110~First electric regulating valve, 111~Second fine ash manual valve, 112~Third fine ash manual valve, 113~First pressure sensor, 114~First flow sensor, 115~First fine ash temperature sensor, 116~Second fine ash temperature sensor, 117~First fine ash variable frequency motor. 201~Second ash hopper, 202~Second conveying pipe, 203~First coarse ash chute, 204~Second water-cooled screw conveyor, 205~Second coarse ash chute, 206~Second water inlet pipe, 207~Second water outlet pipe, 208~Second electric gate valve, 209~First coarse ash manual valve, 210~Second electric regulating valve, 211~Second coarse ash manual valve, 212~Second coarse ash manual valve, 213~Second pressure sensor, 214~Second flow sensor, 215~First coarse ash temperature sensor, 216~Second coarse ash temperature sensor, 217~First coarse ash variable frequency motor, 218~Slag grinder. Detailed Implementation

[0019] To facilitate understanding and implementation of this utility model by those skilled in the art, the present utility model will be further described in detail below with reference to embodiments. It should be understood that the embodiments described herein are only for illustration and explanation of this utility model and are not intended to limit this utility model.

[0020] Example 1:

[0021] like Figure 1 As shown, a waste boiler bottom ash conveying system includes a fine ash water-cooled conveying chain 1, a coarse ash water-cooled conveying chain 2, and a chain conveyor 3. Both the fine ash water-cooled conveying chain 1 and the coarse ash water-cooled conveying chain 2 include an ash collection hopper, a conveying pipeline, an electric gate valve, a first chute, a water-cooled spiral conveyor, and a second chute. The outlet of the ash collection hopper is connected to the inlet of the conveying pipeline. An electric gate valve is installed on the conveying pipeline. The outlet of the conveying pipeline is connected to the inlet of the first chute. The outlet of the first chute is connected to the inlet of the water-cooled spiral conveyor. The outlet of the water-cooled spiral conveyor is connected to the inlet of the second chute. The outlet of the second chute is located above the input end of the chain conveyor 3. A bucket elevator unit is installed at the output end of the chain conveyor 3. The inlet of the water-cooled spiral conveyor is connected to a cold slag water system via an inlet pipe, and the outlet of the water-cooled spiral conveyor is connected to a deaerator system via an outlet pipe.

[0022] The ash collection hoppers of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first ash collection hopper 101 and the second ash collection hopper 201; the conveying pipes of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first conveying pipe 102 and the second conveying pipe 202; the first chute of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 is respectively the first fine ash chute 103 and the first coarse ash chute 203; the water-cooled screw conveyors of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first water-cooled screw conveyor 104 and the second water-cooled screw conveyor 204. 4; The second chute of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the second fine ash chute 105 and the second coarse ash chute 205; the water inlet pipes of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first water inlet pipe 106 and the second water inlet pipe 206; the water outlet pipes of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first water outlet pipe 107 and the second water outlet pipe 207; the electric gate valves of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively the first electric gate valve 108 and the second electric gate valve 208.

[0023] After collecting fine ash in the fine ash water-cooled conveying ash path 1, the fine ash is cooled and then conveyed to the chain conveyor 3; after collecting coarse ash in the coarse ash water-cooled conveying ash path 2, the coarse ash is crushed and then conveyed to the second water-cooled screw conveyor 204 for cooling, and then the crushed coarse ash is conveyed to the chain conveyor 3.

[0024] The ash inlet of the first ash hopper 101 is connected to the fine ash outlet of the ash hopper at the bottom of the boiler. The ash outlet of the first ash hopper 101 is connected to the inlet of the first conveying pipe 102. The first conveying pipe 102 is equipped with a first electric gate valve 108. The outlet of the first conveying pipe 102 is connected to the inlet of the first fine ash chute 103. The outlet of the first fine ash chute 103 is connected to the ash inlet of the first water-cooled spiral ash conveyor 104. The ash outlet of the first water-cooled spiral ash conveyor 104 is connected to the inlet of the second fine ash chute 105. The outlet of the second fine ash chute 105 is located above the chain conveyor 3. The water inlet of the first water-cooled spiral ash conveyor 104 is connected to the manual main valve 4 through the first water inlet pipe 106. The manual main valve 4 is connected to the cold slag water system through a pipe. The water outlet of the first water-cooled spiral ash conveyor 104 is connected to the deaerator system through the first water outlet pipe 107.

[0025] The inlet of the second ash collection hopper 201 is connected to the coarse slag outlet at the bottom of the boiler. The outlet of the second ash collection hopper 201 is connected to the inlet of the slag mill 218. The outlet of the slag mill 218 is connected to the inlet of the second conveying pipe 202. The slag mill 218 is connected to the control cabinet 5. A second electric gate valve 208 is installed on the second conveying pipe 202. The outlet of the second conveying pipe 202 is connected to the inlet of the first coarse ash chute 203. The outlet of the first coarse ash chute 203 is connected to the second water-cooled spiral ash conveyor. The ash inlet of the second water-cooled screw conveyor 204 is connected to the ash outlet of the second water-cooled screw conveyor 204, which is connected to the inlet of the second coarse ash chute 205. The outlet of the second coarse ash chute 205 is located above the chain conveyor 3. The water inlet of the second water-cooled screw conveyor 204 is connected to the manual main valve 4 through the second water inlet pipe 206. The manual main valve 4 is connected to the cold slag water system through a pipe. The water outlet of the second water-cooled screw conveyor 204 is connected to the deaerator system through the second water outlet pipe 207. The coarse ash is collected in the second ash collection hopper 201 and then enters the slag mill 218 to be crushed into crushed coarse ash. The crushed coarse ash then passes through the second conveying pipe 202 and the second coarse ash chute 205 in sequence, and enters the second water-cooled screw conveyor 204 to exchange heat with the cold slag water.

[0026] In some embodiments, the inlet pipe is sequentially equipped with a first manual valve, an electric regulating valve, and a second manual valve along the water inlet direction, and the electric regulating valve is connected to the control cabinet 5; the outlet pipe is equipped with a third manual valve. The first manual valves of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a first fine ash manual valve 109 and a first coarse ash manual valve 209; the electric regulating valves of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a first electric regulating valve 110 and a second electric regulating valve 210; the second manual valves of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a second fine ash manual valve 111 and a second coarse ash manual valve 211; the third manual valves of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a third fine ash manual valve 112 and a third coarse ash manual valve 212.

[0027] Along the water inlet pipe 106, a first fine ash manual valve 109, a first electric regulating valve 110, and a second fine ash manual valve 111 are sequentially installed. The first electric regulating valve 110 is connected to the control cabinet 5. The water flow in the first inlet pipe 106 is adjusted by regulating the first electric regulating valve 110 through the control cabinet 5. A third fine ash manual valve 112 is installed on the first outlet pipe 107. When cooling the fine ash, the main manual valve 4, the first fine ash manual valve 109, the second fine ash manual valve 111, and the third fine ash manual valve 112 are opened sequentially. Then, the first electric regulating valve 110 is opened. The cold ash water enters the first water-cooled spiral conveyor 104 from the cold ash water system through the first inlet pipe 106. In the first water-cooled spiral conveyor 104, heat exchange occurs with the fine ash, and after cooling, the fine ash flows out from the first water-cooled spiral conveyor 104 and finally enters the deaerator system through the first outlet pipe 107.

[0028] Along the water inlet direction, the second inlet pipe 206 is equipped with a first coarse ash manual valve 209, a second electric regulating valve 210, and a second coarse ash manual valve 211. The second electric regulating valve 210 is connected to the control cabinet 5. The flow rate of the second inlet pipe 206 is adjusted by regulating the second electric regulating valve 210 through the control cabinet 5. The second outlet pipe 207 is equipped with a third coarse ash manual valve 212. When cooling the crushed coarse ash, the main manual valve 4, the first coarse ash manual valve 209, the second coarse ash manual valve 211, and the third coarse ash manual valve 212 are opened in sequence. Then, the second electric regulating valve 210 is opened. The cold slag water enters the second water-cooled screw conveyor 204 from the cold slag water system through the second inlet pipe 206. In the second water-cooled screw conveyor 204, heat exchange occurs with the crushed coarse ash, and after cooling, the crushed coarse ash flows out from the second water-cooled screw conveyor 204 and finally enters the deaerator system through the second outlet pipe 207.

[0029] In some embodiments, a pressure sensor is installed on the water inlet pipe, and the pressure sensor is connected to the control cabinet 5. The pressure sensors for the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are a first pressure sensor 113 and a second pressure sensor 213, respectively.

[0030] A first pressure sensor 113 is installed on the first water inlet pipe 106. The first pressure sensor 113 is connected to the control cabinet 5. The first pressure sensor 113 feeds back the water pressure of the first water inlet pipe 106 to the control cabinet 5. The first pressure sensor 113 monitors the water pressure of the first water inlet pipe 106 in real time.

[0031] A second pressure sensor 213 is installed on the second water inlet pipe 206. The second pressure sensor 213 is connected to the control cabinet 5. The second pressure sensor 213 feeds back the water pressure of the second water inlet pipe 206 to the control cabinet 5. The second pressure sensor 213 monitors the water pressure of the second water inlet pipe 206 in real time.

[0032] In some embodiments, a flow sensor is installed on the outlet pipe, and the flow sensor is connected to the control cabinet 5. The flow sensors for the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are a first flow sensor 114 and a second flow sensor 214, respectively.

[0033] A first flow sensor 114 is installed on the first water outlet pipe 107. The first flow sensor 114 is connected to the control cabinet 5. The first flow sensor 114 feeds back the flow of the first water outlet pipe 107 to the control cabinet 5, and monitors the flow of the first water outlet pipe 107 in real time.

[0034] A second flow sensor 214 is installed on the second water outlet pipe 207. The second flow sensor 214 is connected to the control cabinet 5. The second flow sensor 214 feeds back the flow of the second water outlet pipe 207 to the control cabinet 5, and monitors the flow of the second water outlet pipe 207 in real time.

[0035] In some embodiments, a first temperature sensor is installed on the inlet pipe, and a second temperature sensor is installed on the outlet pipe. The first and second temperature sensors are respectively connected to the control cabinet 5. The first temperature sensors for the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a first fine ash temperature sensor 115 and a first coarse ash temperature sensor 215; the second temperature sensors for the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are respectively a second fine ash temperature sensor 116 and a second coarse ash temperature sensor 216.

[0036] A first fine ash temperature sensor 115 is installed on the first water inlet pipe 106, and a second fine ash temperature sensor 116 is installed on the first water outlet pipe 107. The first fine ash temperature sensor 115 and the second fine ash temperature sensor 116 are respectively connected to the control cabinet 5. The first fine ash temperature sensor 115 and the second fine ash temperature sensor 116 respectively feed back the water temperature of the first water inlet pipe 106 and the water temperature of the first water outlet pipe 107 to the control cabinet 5. The first fine ash temperature sensor 115 and the second fine ash temperature sensor 116 monitor the water temperature of the first water inlet pipe 106 and the first water outlet pipe 107 in real time.

[0037] A first coarse ash temperature sensor 215 is installed on the second inlet pipe 206, and a second coarse ash temperature sensor 216 is installed on the second outlet pipe 207. The first and second coarse ash temperature sensors 215 and 216 are respectively connected to the control cabinet 5. The first and second coarse ash temperature sensors 215 and 216 respectively feed back the water temperature of the second inlet pipe 206 and the second outlet pipe 207 to the control cabinet 5. The first and second coarse ash temperature sensors 215 and 216 respectively monitor the water temperature of the second inlet pipe 206 and the second outlet pipe 207 in real time.

[0038] In some embodiments, the water-cooled screw conveyor is connected to a first variable frequency motor, the chain conveyor 3 is connected to a second variable frequency motor 6, and the first and second variable frequency motors 6 are respectively connected to the control cabinet 5. The first variable frequency motors of the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2 are a first fine ash variable frequency motor 117 and a first coarse ash variable frequency motor 217, respectively.

[0039] The first water-cooled spiral ash conveyor 104 is connected to the first fine ash variable frequency motor 117, and the chain plate conveyor 3 is connected to the second variable frequency motor 6. The first fine ash variable frequency motor 117 and the second variable frequency motor 6 are respectively connected to the control cabinet 5. The speed of the first fine ash variable frequency motor 117 and the second variable frequency motor 6 can be controlled by the control cabinet 5, and the conveying speed of the fine ash can be adjusted.

[0040] The second water-cooled spiral conveyor 204 is connected to the No. 1 coarse ash variable frequency motor 217, which is connected to the control cabinet 5. The speed of the No. 1 coarse ash variable frequency motor 217 can be controlled by the control cabinet 5, thereby adjusting the conveying speed of the crushed coarse ash.

[0041] Example 2:

[0042] A method for conveying ash from the bottom of a waste-to-energy boiler, using the waste-to-energy boiler bottom ash conveying system described in Example 1 above, is carried out according to the following steps: Step 1: First turn on the No. 1 fine ash variable frequency motor 117, the No. 1 coarse ash variable frequency motor 217 and the No. 2 variable frequency motor 6, and start the conveying function of the first water-cooled screw conveyor 104, the second water-cooled screw conveyor 204 and the chain conveyor 3 to prevent the accumulation of hot ash when hot ash enters. Step 2: Open the main manual valve 4, fine ash manual valve 109, fine ash manual valve 111, fine ash manual valve 112, coarse ash manual valve 209, coarse ash manual valve 211, and coarse ash manual valve 212 in sequence. Then, open the first electric regulating valve 110 and the second electric regulating valve 210 through the control cabinet 5 to start the water cooling function of the first water-cooled screw conveyor 104 and the second water-cooled screw conveyor 204, so that when hot ash enters the first water-cooled screw conveyor 104 and the second water-cooled screw conveyor 204, the hot ash is cooled down in time. Step 3: Start the slag grinder 218 through the control cabinet 5 to crush the coarse ash flowing out of the second ash collection hopper 201; Step 4: Open the first electric gate valve 108 and the second electric gate valve 208 via control cabinet 5. Fine ash water-cooled conveying ash path 1 begins conveying fine ash, and coarse ash water-cooled conveying ash path 2 begins conveying crushed coarse ash. The fine ash and crushed coarse ash are conveyed to the chain conveyor 3 via the fine ash water-cooled conveying ash path 1 and the coarse ash water-cooled conveying ash path 2, respectively, and then conveyed to the bucket elevator unit via the chain conveyor 3.

[0043] This invention solves the problem of insufficient cooling of coarse ash during mixed transport by setting up a fine ash water-cooled conveying ash path 1 and a coarse ash water-cooled conveying ash path 2 to cool the fine ash and coarse ash respectively during the conveying process, thus avoiding the problem of insufficient cooling of coarse ash during mixed transport of coarse and fine ash.

[0044] When the coarse ash enters the coarse ash water-cooled conveying ash path 2, it is first crushed. The crushed coarse ash has better thermal conductivity than the uncrushed coarse ash, which improves the cooling efficiency of the coarse ash.

[0045] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A waste boiler bottom ash conveying system, comprising a chain conveyor (3), characterized in that, It also includes a fine ash water-cooled conveying ash path (1) and a coarse ash water-cooled conveying ash path (2); both the fine ash water-cooled conveying ash path (1) and the coarse ash water-cooled conveying ash path (2) include an ash collection hopper, a conveying pipeline, a No. 1 chute, a water-cooled spiral conveyor, and a No. 2 chute. The inlet of the ash collection hopper in the fine ash water-cooled conveying ash path (1) is connected to the fine ash outlet of the ash hopper at the bottom of the boiler. The inlet of the ash collection hopper in the coarse ash water-cooled conveying ash path (2) is connected to the coarse slag outlet at the bottom of the boiler. The outlet of the ash collection hopper is connected to the inlet of the conveying pipeline. The conveying pipeline is equipped with There is an electric gate valve. The outlet of the conveying pipeline is connected to the inlet of the No. 1 chute. The outlet of the No. 1 chute is connected to the ash inlet of the water-cooled spiral ash conveyor. The ash outlet of the water-cooled spiral ash conveyor is connected to the inlet of the No. 2 chute. The outlet of the No. 2 chute is located above the input end of the chain conveyor (3). The output end of the chain conveyor (3) is equipped with a bucket elevator unit. The inlet of the water-cooled spiral ash conveyor is connected to the cold slag water system through the inlet pipe. The outlet of the water-cooled spiral ash conveyor is connected to the deaerator system through the outlet pipe.

2. The ash conveying system at the bottom of a waste boiler according to claim 1, characterized in that, The outlet of the ash collection hopper in the coarse ash water-cooled conveying ash path (2) is connected to the inlet of the slag mill (218), the outlet of the slag mill (218) is connected to the inlet of the conveying pipe in the coarse ash water-cooled conveying ash path (2), and the slag mill (218) is connected to the control cabinet (5).

3. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, An electric gate valve is installed on the conveying pipeline, and the electric gate valve is connected to the control cabinet (5).

4. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, The inlet end of the water inlet pipe is connected to the outlet end of the manual main valve (4), and the inlet end of the manual main valve (4) is connected to the cold slag water system through a pipe; the water inlet pipe is sequentially equipped with a No. 1 manual valve, an electric regulating valve and a No. 2 manual valve along the water inlet direction, and the electric regulating valve is connected to the control cabinet (5); the outlet pipe is equipped with a No. 3 manual valve.

5. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, A pressure sensor is installed on the water inlet pipe, and the pressure sensor is connected to the control cabinet (5).

6. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, A flow sensor is installed on the water outlet pipe, and the flow sensor is connected to the control cabinet (5).

7. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, Temperature sensor No. 1 is installed on the water inlet pipe, and temperature sensor No. 2 is installed on the water outlet pipe. Temperature sensor No. 1 and temperature sensor No. 2 are respectively connected to control cabinet (5).

8. The ash conveying system at the bottom of a waste boiler according to claim 2, characterized in that, The water-cooled spiral ash conveyor is connected to the No. 1 variable frequency motor, the chain plate conveyor (3) is connected to the No. 2 variable frequency motor (6), and the No. 1 variable frequency motor and the No. 2 variable frequency motor (6) are respectively connected to the control cabinet (5).

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