Boiler slag bunker slag dust lifting and recycling device

Abstract

This utility model relates to the field of boiler ash discharge technology, and is a boiler ash bin dust collection device. It includes a boiler, a ash cooler, an ash bin, and a dust collector. A ash discharge pipe is fixedly connected between the bottom outlet of the boiler and the ash cooler. A belt conveyor is fixedly installed between the ash cooler and the upper inlet of the ash bin. A tail flue is fixedly connected between the lower outlet of the boiler and the dust collector. A dust collection pipe is fixedly connected between the lower outlet of the ash bin and the tail flue. A dust collection pipe is fixedly connected between the upper outlet of the ash bin and the tail flue. An ash discharge expansion joint is installed at the lower ash discharge port of the ash bin, and dust suction hoods are installed in different directions on the expansion joint. This utility model has a reasonable and compact structure and is easy to use. It uses the negative pressure of an induced draft fan to draw the dust generated during the ash discharge process to the dust collector, which then enters the ash hopper after pulse jet cleaning, and finally is transported to the ash silo by a bin pump. It features safety, labor saving, simplicity, and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of boiler slag discharge technology and is a boiler slag bin slag discharge and dust recovery device. Background Technology

[0002] The optimal time for boiler ash removal is when the ash accumulation height reaches the specified limit, combustion is unstable, or coking occurs. Specifically, the conditions for ash removal include: when the ash accumulation height reaches the specified limit and the ash layer affects normal combustion, ash removal is necessary to ensure combustion efficiency and furnace ventilation; and when combustion is unstable or coking occurs, excessive ash can lead to coking on the heating surfaces, threatening the safe operation of the boiler, requiring timely cleaning.

[0003] Currently, each boiler is equipped with an ash conveying system. Ash discharged from the boiler via the ash cooler is conveyed to the ash bin via a flat conveyor belt and an inclined conveyor belt. The ash is then discharged through the ash discharge port expansion joint to a tipper truck, which is then transported to the ash and slag shed. The boiler ash discharge time is approximately 20 minutes per day. The discharge of ash from the ash bin to the tipper truck generates a significant amount of dust, which not only affects the surrounding environment and does not meet environmental protection requirements, but also increases the workload of cleaning and sanitation workers, impacting their physical and mental health.

[0004] Therefore, it is essential to research and invent a boiler slag bin dust recovery device. Summary of the Invention

[0005] This utility model provides a boiler slag bin dust collection device, which overcomes the shortcomings of the existing technology. It can effectively solve the problems of large amounts of dust, environmental impact, increased workload of workers, and negative impact on physical and mental health that exist in the existing boiler slag bin discharge process.

[0006] The technical solution of this utility model is achieved through the following measures: a boiler slag bin slag discharge and dust recovery device, including a boiler, a slag cooler, a slag bin, and a dust collector. A slag discharge pipe is fixedly connected between the bottom outlet of the boiler and the slag cooler. A belt conveyor is fixedly installed between the slag cooler and the upper inlet of the slag bin. A tail flue is fixedly connected between the lower outlet of the boiler and the dust collector. A dust collection pipe is fixedly connected between the lower outlet of the slag bin and the tail flue. A dust removal pipe is fixedly connected between the upper outlet of the slag bin, the dust collection pipe, and the tail flue between the dust collector and the dust collector.

[0007] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0008] The slag discharge port at the bottom of the slag bin is fixedly equipped with a slag discharge expansion joint, and a dust suction hood is installed on the slag discharge expansion joint. A dust collection branch pipe is fixedly connected between the dust suction hood and the dust collection pipe.

[0009] The above-mentioned dust suction hood is provided in one or more directions, and each dust suction hood is provided in a different direction of the slag discharge expansion joint.

[0010] The dust collector mentioned above is a bag filter dust collector. The bottom of the dust collector is equipped with a dust hopper. There is one or more dust hoppers. The bottom of the dust hopper is fixedly connected to a dust conveying pipe, and a hopper pump is fixedly installed on the dust conveying pipe.

[0011] The dust collector is fixedly connected to a pulse pipeline at its upper inlet.

[0012] The dust collector is fixedly connected to a flue gas emission pipeline at its upper outlet, and an induced draft fan is fixedly installed on the flue gas emission pipeline.

[0013] A switch valve is fixedly installed on the dust collection pipeline, and a pulse valve is fixedly installed on the pulse pipeline.

[0014] The above also includes a PLC controller, which houses a DCS control system. The slag cooler, silo pump, induced draft fan, switching valve, and pulse valve are all electrically connected to the DCS control system.

[0015] This utility model has a reasonable and compact structure and is easy to use. It uses an induced draft fan to draw the dust generated during the slag discharge process to the dust collector. The opening of the switch valve can be adjusted at will according to the on-site dust discharge requirements. It is opened when slag is discharged and closed when slag discharge ends. It is simple, easy to implement, highly reliable, environmentally friendly and energy-saving, and realizes the recycling and management of dust. It has the characteristics of safety, labor saving, simplicity and high efficiency. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0017] Appendix Figure 1 The codes in the code are as follows: 1 for boiler, 2 for slag cooler, 3 for slag bin, 4 for dust collector, 5 for slag discharge pipe, 6 for belt conveyor, 7 for tail flue, 8 for dust collection pipe, 9 for dust removal pipe, 10 for slag discharge expansion joint, 11 for dust suction hood, 12 for dust collection branch pipe, 13 for ash hopper, 14 for ash conveying pipe, 15 for bin pump, 16 for pulse line, 17 for flue gas emission line, 18 for induced draft fan, 19 for on / off valve, 20 for pulse valve, and 21 for PLC controller. Detailed Implementation

[0018] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0019] Unless otherwise specified, all equipment and devices used in this invention are existing, publicly known, and commonly used equipment and devices in the field.

[0020] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0021] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0022] Example 1: As shown in the attached document Figure 1 As shown, the boiler slag bin slag discharge and dust recovery device includes a boiler 1, a slag cooler 2, a slag bin 3, a dust collector 4, and a belt conveyor 6. A slag discharge pipe 5 is fixedly connected between the bottom outlet of the boiler 1 and the slag cooler 2. A belt conveyor 6 is fixedly installed between the slag cooler 2 and the upper inlet of the slag bin 3. A tail flue 7 is fixedly connected between the lower outlet of the boiler 1 and the dust collector 4. A dust collection pipe 8 is fixedly connected between the lower outlet of the slag bin 3 and the tail flue 7. A dust removal pipe 9 is fixedly connected between the upper outlet of the slag bin 3, the dust collection pipe 8, and the tail flue 7 between the dust collector 4 and the dust collector 4.

[0023] In this utility model, the slag in the boiler 1 is fed to the slag bin 3 via the slag cooler 2 and belt conveyor 6. The slag in the slag bin 3 is discharged through the slag discharge port at the bottom of the slag bin 3. The dust generated during the slag discharge process in the slag bin 3 is collected in the dust collector 4 through the dust collection pipe 8. The dust-laden flue gas in the boiler 1 enters the dust collector 4 through the tail flue 7. After the dust and dust-laden flue gas are removed by the dust collector 4, the solid dust is discharged through the bottom of the dust collector 4. The flue gas after dust removal is discharged in compliance with the standards.

[0024] Depending on the requirements, belt conveyor 6 can be composed of a combination of flat belt conveyor and inclined belt conveyor.

[0025] The above-mentioned boiler slag bin ash discharge and dust recovery device can be further optimized and / or improved according to actual needs:

[0026] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1 As shown, a slag discharge expansion joint 10 is fixedly installed at the slag discharge port at the lower part of the slag bin 3. A dust suction hood 11 is installed on the slag discharge expansion joint 10. A dust collection branch pipe 12 is fixedly connected between the dust suction hood 11 and the dust collection pipe 8.

[0027] As needed, the slag discharge expansion joint 10 can be controlled by a winch. When the slag bin 3 needs to discharge slag, the slag discharge expansion joint 10 extends into the tipper truck, and the slag is transported to the ash and slag shed by the tipper truck.

[0028] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1As shown, there is one or more dust suction hoods 11, and each dust suction hood 11 is respectively arranged in different directions of the slag discharge expansion joint 10.

[0029] As needed, the dust generated by slag discharge is collected by the dust collection hood 11 into the dust collection pipe 8, and then drawn into the dust collector 4 by the induced draft fan 18.

[0030] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, the dust collector 4 is a bag filter dust collector. The lower part of the dust collector 4 is provided with a dust hopper 13. There is one or more dust hoppers 13. The bottom of the dust hopper 13 is fixedly connected to a dust conveying pipe 14. A hopper pump 15 is fixedly installed on the dust conveying pipe 14.

[0031] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, the upper inlet of the dust collector 4 is fixedly connected to a pulse pipeline 16.

[0032] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, the upper outlet of the dust collector 4 is fixedly connected to a flue gas emission pipeline 17, and an induced draft fan 18 is fixedly installed on the flue gas emission pipeline 17.

[0033] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, a switch valve 19 is fixedly installed on the dust collection pipe 8, and a pulse valve 20 is fixedly installed on the pulse pipeline 16.

[0034] Before discharging slag from slag bin 3 as needed, start the induced draft fan 18 and open the switch valve 19. The dust generated by slag discharge enters the dust collection pipe 8 along the dust suction hood 11. The dust generated in slag bin 3 enters the dust removal pipe 9. Through the induced draft fan 18, the dust and other solid dust are drawn into the dust collector 4. Control the opening and closing state of the pulse valve 20 and use compressed air to blow air into the dust collector 4. The solid dust in the dust collector 4 enters the ash hopper 13 after being blown in, and finally is transported to the ash silo through the bin pump 15.

[0035] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, it also includes a PLC controller 21, in which a DCS control system is installed. The slag cooler 2, the silo pump 15, the induced draft fan 18, the switching valve 19, and the pulse valve 20 are all electrically connected to the DCS control system.

[0036] Depending on the needs, the pipelines and equipment of the boiler slag bin dust collection device can also be equipped with conventional valves, thermometers, and pressure gauges known in the art, according to production requirements. The PLC controller 21 can be a Siemens S7-1500, and a Yokogawa CS3000 DCS control system is installed in the PLC controller 21.

[0037] The above technical features constitute various embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0038] The usage process of this utility model embodiment is as follows: First, the boiler 1 discharges slag through the slag discharge pipe 5. The slag passes through the slag cooler 2 and is conveyed to the slag bin 3 via the belt conveyor 6. The dust-laden flue gas enters the dust collector 4 through the tail flue 7 for dust removal. Next, the slag entering the slag bin 3 is discharged along the slag discharge expansion joint 10 at the bottom of the slag bin 3. The dust generated during the slag discharge process of the slag bin 3 enters the dust collection pipe 8 through the dust suction hood 11 and is collected by the dust collector 4. Finally, the dust collector 4 generates solid dust and dust-removed flue gas after dust removal. The solid dust is sent out through the ash hopper 13 via the bin pump 15, and the dust-removed flue gas is discharged through the flue gas discharge pipeline 17.

Claims

1. A boiler slag bin ash discharge and dust recovery device, characterized in that... It includes a boiler, a slag cooler, a slag bin, and a dust collector. A slag discharge pipe is fixedly connected between the bottom outlet of the boiler and the slag cooler. A belt conveyor is fixedly installed between the slag cooler and the upper inlet of the slag bin. A tail flue is fixedly connected between the lower outlet of the boiler and the dust collector. A dust collection pipe is fixedly connected between the lower outlet of the slag bin and the tail flue. A dust removal pipe is fixedly connected between the upper outlet of the slag bin, the dust collection pipe, and the tail flue between the dust collector and the dust collector.

2. The boiler slag bin ash discharge and dust recovery device according to claim 1, characterized in that... A slag discharge expansion joint is fixedly installed at the slag discharge port at the bottom of the slag bin. A dust suction hood is installed on the slag discharge expansion joint, and a dust collection branch pipe is fixedly connected between the dust suction hood and the dust collection pipe.

3. The boiler slag bin slag discharge and dust recovery device according to claim 2, characterized in that... There is one or more dust suction hoods, and each dust suction hood is set in a different direction of the slag discharge expansion joint.

4. The boiler slag bin slag discharge and dust recovery device according to claim 1, 2, or 3, characterized in that... The dust collector is a bag filter dust collector. There is one or more ash hoppers at the bottom of the dust collector. The bottom of the ash hopper is fixedly connected to an ash conveying pipe, and a hopper pump is fixedly installed on the ash conveying pipe.

5. The boiler slag bin ash discharge and dust recovery device according to claim 1, 2, or 3, characterized in that... The upper inlet of the dust collector is fixedly connected to a pulse pipeline.

6. The boiler slag bin ash discharge and dust recovery device according to claim 4, characterized in that... The upper inlet of the dust collector is fixedly connected to a pulse pipeline.

7. The boiler slag bin dust collection and recovery device according to claim 1, 2, 3, or 6, characterized in that... The upper outlet of the dust collector is fixedly connected to a flue gas emission pipeline, and an induced draft fan is fixedly installed on the flue gas emission pipeline.

8. The boiler slag bin slag discharge and dust recovery device according to claim 7, characterized in that... A switch valve is fixedly installed on the dust collection pipeline, and a pulse valve is fixedly installed on the pulse pipeline.

9. The boiler slag bin slag discharge and dust recovery device according to claim 8, characterized in that... It also includes a PLC controller, which houses a DCS control system. The slag cooler, silo pump, induced draft fan, switching valve, and pulse valve are all electrically connected to the DCS control system.

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