Comprehensive treatment device based on boiler bottom slag removal

Abstract

The utility model discloses a comprehensive treatment device based on boiler bottom slag removal, which is characterized in that a mechanical seal is arranged above a slag well, a hydraulic shut-off door is arranged below the slag well, a camera shooting and lighting device is arranged on the hydraulic shut-off door, a dry-type slag extractor is connected with a conveying chain of a conveying device, an air volume adjusting door and a temperature sensor are arranged above the conveying device, and the conveying chain is connected with the conveying device. The electric hoist is arranged above the slag bin, the slag crusher is connected with an inlet of the slag bin, the continuous level gage, the high level gage and the inlet door are arranged on the slag bin, the electromagnetic vibrator is connected below the slag bin, the manual slide plate gate and the pneumatic slide plate gate control connection of the slag bin and the electric material feeder, the first manual ball valve is connected with the pipeline pump, and the pipeline pump is connected with the check valve. The check valve is connected with the pneumatic butterfly valve, the pneumatic butterfly valve is connected with the flow regulating valve, the flow regulating valve is connected with the double-shaft stirrer, the tensioning hydraulic station and the shut-off door hydraulic station are arranged below the conveying device, the second manual ball valve is connected with the electromagnetic valve, and the electromagnetic valve controls connection of the hydraulic shut-off door and the spraying water pipeline.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler slag discharging, and particularly relates to a comprehensive treatment device for boiler bottom slag removal. Background Art

[0002] At present, most of the boiler slag discharging methods for thermal power coal-fired units adopt dry slag discharging. The waste materials remaining after furnace combustion are dropped onto the conveyor belt through the opening of the bottom hydraulic shut-off door of the furnace. The burned slag is slowly transported by the conveyor belt and falls into the slag crusher. After being crushed by the slag crusher, the large slag falls into the hopper. The cleaning chain, in cooperation with the scraper, sends the fine ash falling down into the hopper. The conveyor belt and the cleaning chain jointly complete the discharge of the slag after furnace combustion.

[0003] However, the following problems exist:

[0004] 1. Traditional boiler bottom slag removal cannot monitor the bottom slag discharging condition in real time, and cannot understand the slag falling situation or the working condition of the extrusion head;

[0005] 2. The boiler is usually in a negative pressure state, and about 9% of ambient cold air leaks in from the furnace bottom, which reduces the boiler thermal efficiency, increases the production of NOx generated by boiler combustion. Therefore, in order to meet the environmental protection emission standards, the power plant has to increase the dosage of the denitrification reagent NH3. Content of the Utility Model

[0006] The purpose of the utility model is to propose a comprehensive treatment device for boiler bottom slag removal in view of the above problems.

[0007] A comprehensive treatment device for boiler bottom slag removal includes a mechanical seal, a slag well, a hydraulic shut-off door, a dry slag discharger, a camera and lighting device, an air volume regulating door, an electric hoist, a slag crusher, a continuous level gauge, a high level gauge, a vacuum relief valve, a pulse bag filter, a slag bin, an electromagnetic vibrator, a manual slide gate, a pneumatic slide gate, an electric feeder, a double-shaft mixer, a dry ash loader, a temperature sensor, a manhole door, a blockage switch, a first manual ball valve, a pipeline pump, a check valve, a flow regulating valve, a pneumatic butterfly valve, a tensioning hydraulic station, a shut-off door hydraulic station, a second manual ball valve, and a solenoid valve;

[0008] The electric feeder includes a first electric feeder and a second electric feeder;

[0009] The mechanical seal is arranged above the slag well. Three hydraulic shut-off valves are arranged below each slag well. The camera and lighting devices are respectively arranged on each hydraulic shut-off valve. The dry slag discharger is connected to the conveying chain of the conveying device. The air volume regulating valve and the temperature sensor are arranged above the conveying device. The electric hoist is arranged above the slag bin. The slag crusher is connected to the inlet of the slag bin. The continuous level gauge, high level gauge and manhole are arranged on the slag bin. The electromagnetic vibrator is connected below the slag bin. The manual slide gate and pneumatic slide gate control the connection between the slag bin and the electric feeder. The first electric feeder is connected to the double-shaft mixer. The second electric feeder is connected to the dry ash bulk loader. The first manual ball valve is connected to the pipeline pump. The pipeline pump is connected to the check valve. The check valve is connected to the pneumatic butterfly valve. The pneumatic butterfly valve is connected to the flow regulating valve. The flow regulating valve is connected to the double-shaft mixer. The tensioning hydraulic station and the shut-off valve hydraulic station are arranged below the conveying device. The second manual ball valve is connected to the solenoid valve. The solenoid valve controls the connection between the hydraulic shut-off valve and the sprinkler pipeline.

[0010] Further, a comprehensive treatment device for boiler bottom slag removal, the first outlet of the slag bin is connected to the dry ash bulk loader through an instrument air compression pipeline, and the second outlet of the slag bin is connected to the double-shaft mixer through an instrument air compression pipeline.

[0011] Further, a comprehensive treatment device for boiler bottom slag removal, the first manual ball valve, pipeline pump, check valve, flow regulating valve, and pneumatic butterfly valve are all arranged on the water pipeline.

[0012] Further, a comprehensive treatment device for boiler bottom slag removal, the second manual ball valve is arranged on the water pipeline to control the connection between the hydraulic shut-off valve and the water pipeline.

[0013] Further, a comprehensive treatment device for boiler bottom slag removal, the conveying device is composed of a conveying chain and a housing. A boiler is arranged above the slag well. The lower part of the slag well is respectively connected to the upper part of the three hydraulic shut-off valves. A set of camera and lighting devices are arranged on the housing of the hydraulic shut-off valve.

[0014] Further, a comprehensive treatment device for boiler bottom slag removal, the air volume regulating valve, temperature sensor, and blockage switch are all arranged at the outlet position of the conveying device. A set of camera and photo devices are arranged on the housing of the conveying device.

[0015] Further, a comprehensive treatment device for boiler bottom slag removal, the blockage switch controls the connection between the slag crusher and the transmission device.

[0016] Further, a comprehensive treatment device for boiler bottom slag removal, the conveying chain includes a double-sleeve die-forged chain and a group of scale buckets. The conveying carrier of the dry slag discharger is a simply supported shaft. The dry slag discharger is connected to the conveying chain through a pressure wheel.

[0017] Advantages of the utility model:

[0018] 1. When at low load, by closing the hydraulic shut-off door and intermittently opening the slag discharge, the generation amount of NOx under the same working conditions is reduced, and the consumption of liquid ammonia is greatly reduced;

[0019] 2. The bottom of the machine box body of the hydraulic shut-off door is composed of section steel to form a frame structure, which is supported on the foundation by steel structure columns, so as to withstand the impact force of large pieces of slag. A stable support structure is formed with the columns of the boiler slag storage hopper through auxiliary connecting beams to withstand the acting force generated by the horizontal movement of the extrusion head;

[0020] 3. The camera monitor enables the operating personnel to monitor the slag discharge condition at the bottom of the furnace in real time in the control room. The observation window and inspection window are used to observe the internal slag falling condition or the working condition of the extrusion head on site for the operation of dealing with coking blocks.

[0021] 4. Powered by a hydraulic pump station and connected with stainless steel oil pipes, it drives the horizontal movement of the extrusion head to realize the opening and closing of the extrusion head to achieve the purpose of crushing large slag and isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0023] In the figure: 1 - mechanical seal, 2 - slag well, 3 - hydraulic shut-off door, 4 - dry slag discharger, 5 - camera and lighting device, 6 - air volume regulating door, 7 - electric hoist, 8 - slag crusher, 9 - continuous level gauge, 10 - high level gauge, 11 - vacuum relief valve, 12 - pulse bag filter, 13 - slag bunker, 14 - electromagnetic vibrator, 15 - manual slide gate, 16 - pneumatic slide gate, 17 - electric feeder, 18 - double-shaft mixer, 19 - dry ash loader, 20 - temperature sensor, 21 - manhole door, 22 - blockage switch, 23 - first manual ball valve, 24 - pipeline pump, 25 - check valve, 26 - flow regulating valve, 27 - pneumatic butterfly valve, 28 - tensioning hydraulic station, 29 - shut-off door hydraulic station, 30 - second manual ball valve, 31 - solenoid valve. DETAILED DESCRIPTION OF THE EMBODIMENT

[0024] In order to have a clearer understanding of the technical features, objectives and effects of the utility model, the specific embodiment of the utility model will be described below with reference to the accompanying drawings.

[0025] In this embodiment, as shown in the attached Figure 1As shown in the figure, a comprehensive treatment device for boiler bottom slag removal includes a mechanical seal 1, a slag well 2, a hydraulic shut-off door 3, a dry slag discharger 4, a camera and lighting device 5, an air volume regulating door 6, an electric hoist 7, a slag crusher 8, a continuous level gauge 9, a high level gauge 10, a vacuum relief valve 11, a pulse bag filter 12, a slag bin 13, an electromagnetic vibrator 14, a manual slide gate 15, a pneumatic slide gate 16, an electric feeder 17, a double-shaft mixer 18, a dry ash loader 19, a temperature sensor 20, a manhole door 21, a blockage switch 22, a first manual ball valve 23, a pipeline pump 24, a check valve 25, a flow regulating valve 26, a pneumatic butterfly valve 27, a tensioning hydraulic station 28, a shut-off door hydraulic station 29, a second manual ball valve 30, and a solenoid valve 31;

[0026] The electric feeder 17 includes a first electric feeder and a second electric feeder;

[0027] The mechanical seal 1 is arranged above the slag well 2. Three hydraulic shut-off doors 3 are arranged below each slag well 2. The camera and lighting device 5 are respectively arranged on each hydraulic shut-off door 3. The dry slag discharger 4 is connected to the conveyor chain of the conveying device. The air volume regulating door 6 and the temperature sensor 20 are arranged above the conveying device. The electric hoist 7 is arranged above the slag bin 13. The slag crusher 8 is connected to the inlet of the slag bin 13. The continuous level gauge 9, the high level gauge 10, and the manhole door 21 are arranged on the slag bin 13. The electromagnetic vibrator 14 is connected below the slag bin 13. The manual slide gate 15 and the pneumatic slide gate 16 control the connection between the slag bin 13 and the electric feeder 17. The first electric feeder is connected to the double-shaft mixer 18. The second electric feeder is connected to the dry ash loader 19. The first manual ball valve 23 is connected to the pipeline pump 24. The pipeline pump 24 is connected to the check valve 25. The check valve 25 is connected to the pneumatic butterfly valve 27. The pneumatic butterfly valve 27 is connected to the flow regulating valve 26. The flow regulating valve 26 is connected to the double-shaft mixer 18. The tensioning hydraulic station 28 and the shut-off door hydraulic station 29 are arranged below the conveying device. The second manual ball valve 30 is connected to the solenoid valve 31. The solenoid valve 31 controls the connection between the hydraulic shut-off door 3 and the spraying water pipeline.

[0028] Furthermore, for a comprehensive treatment device for boiler bottom slag removal, the first outlet of the slag bin 13 is connected to the dry ash loader 19 through an instrument air compression pipeline, and the second outlet of the slag bin 13 is connected to the double-shaft mixer 18 through an instrument air compression pipeline.

[0029] Furthermore, for a comprehensive treatment device for boiler bottom slag removal, the first manual ball valve 23, the pipeline pump 24, the check valve 25, the flow regulating valve 26, and the pneumatic butterfly valve 27 are all arranged on the water pipeline.

[0030] Furthermore, for a comprehensive treatment device for boiler bottom slag removal, the second manual ball valve 30 is arranged on the water pipeline to control the connection between the hydraulic shut-off door 3 and the water pipeline.

[0031] Further, a comprehensive treatment device for removing bottom slag from a boiler, wherein the conveying device is composed of a conveying chain and a housing. There is a boiler above the slag well 2, and the lower part of the slag well 2 is respectively connected to the upper parts of three hydraulic shut-off gates 3. A set of camera and lighting device 5 is arranged on the housing of the hydraulic shut-off gate 3.

[0032] Further, a comprehensive treatment device for removing bottom slag from a boiler, wherein the air volume regulating gate 6, the temperature sensor 20, and the blockage switch 22 are all arranged at the outlet position of the conveying device. A set of camera and photo device 5 is arranged on the housing of the conveying device.

[0033] Further, a comprehensive treatment device for removing bottom slag from a boiler, wherein the blockage switch 22 controls the connection between the slag crusher 8 and the conveying device.

[0034] Further, a comprehensive treatment device for removing bottom slag from a boiler, wherein the conveying chain includes a double-sleeve die-forged chain and a group of scale buckets. The conveying load of the dry slag extractor 4 is a simply supported shaft, and the dry slag extractor 4 is connected to the conveying chain through a pressure wheel.

[0035] A comprehensive treatment device for removing bottom slag from a boiler, the principle of bottom slag removal from the boiler is as follows: The waste remaining after furnace combustion enters the slag well 2, and after the furnace bottom hydraulic shut-off gate 3 is opened, it falls onto the conveying chain. The conveyed burned slag falls into the dry slag extractor 4 through the operation of the conveying chain. The dry slag extractor 4 cools and conveys the hot slag. After the large slag is crushed by the slag crusher 8, it falls into the slag bin 13. The electromagnetic vibrator 14 eliminates the blockage of the slag in the slag bin 13 caused by internal friction, deliquescence, electrification, and component segregation. The electro-mechanical feeder 17 evenly or quantitatively supplies the slag from the slag bin to the double-shaft mixer 18 or the dry ash bulk loader 19. The double-shaft mixer 18 operates to stir, disperse, and mix the slag, thereby improving the uniformity of the slag and enhancing the quality of the slag. The dry ash bulk loader 19 quickly and accurately loads the dry ash into the transport dump truck.

[0036] A comprehensive treatment device for removing bottom slag from a boiler, the principle of the camera and lighting device is as follows: A set of camera and lighting device 5 is arranged at the blockage switch 22 to monitor whether there is blockage of the slag from the transport device to the slag crusher 8. Three sets of camera and lighting device 5 are respectively arranged at the three hydraulic shut-off gates 3 to monitor the normal operation of the hydraulic shut-off gates.

[0037] A comprehensive treatment device for removing bottom slag from a boiler, the principle of the water supply from the hydraulic engineering is as follows: There are a total of two water pipes. The water supply from the hydraulic engineering enters the double-shaft mixer 18 through the first manual ball valve 23, the pipeline pump 24, the check valve 25, the pneumatic butterfly valve 27, and the flow regulating valve 26; the water supply from the hydraulic engineering enters the hydraulic shut-off gate 3 through the second manual ball valve 30 and the solenoid valve 31.

[0038] An integrated treatment device based on boiler bottom slag removal. The operating principle and advantages of the dry slag conveyor are as follows: The dry slag conveyor 4 relies on air cooling. The scale hopper serves as the carrier for ash slag and heat exchange. The sleeve die-forged chain is the center for redirecting, carrying, and driving. The conveying process is supported by simple support shafts, and the return journey is supported by cantilever shafts. It has the self-cleaning and fully enclosed function with a synchronous cleaner. The conveying chain of the dry slag conveyor 4 consists of a double sleeve die-forged chain and a group of scale hoppers. Since the sleeve die-forged chain adopts precision forging and processing technology, and the single chain is a wide-width double chain plate structure, it ensures the synchronism of the double-chain drive without deviation. The annual elongation rate is about 0.1 - 0.5%. The sleeve die-forging is a precision chain drive, without slipping, with large output, small wear, high synchronism, and high wear-resistant life. The disadvantage is that the manufacturing process is complex and requires high precision. The manufacturing process of the scale hopper is also relatively complex, but as a carrier for heat exchange during conveying, it has good cooling effect and is more suitable for conveying at large inclination angles and fine ash. The conveying and loading of the dry slag conveyor 4 are also supported by simple support shafts, which have stronger impact resistance than cantilever shafts. The upward redirection of the dry slag machine is achieved by the action of the pressure wheel and the chain, with reasonable force application, and can achieve conveying at a larger angle.

[0039] An integrated treatment device based on boiler bottom slag removal. The specific implementation principle is as follows: There are three slag discharge ports at the lower part of the boiler slag storage hopper, and a pair of hydraulic crushing shut-off gates is connected under each port. Therefore, each unit is equipped with nine pairs of hydraulic crushing shut-off gates 3. The bottom of the crusher box body of the crushing shut-off gate is composed of a steel frame structure and is supported on the foundation through steel structure columns to withstand the impact force of large pieces of furnace slag. At the same time, a stable support structure is formed through the auxiliary connecting beam and the columns of the boiler slag storage hopper to withstand the force generated by the horizontal movement of the extrusion head.

[0040] There is a camera window, an observation window, and four inspection windows on the side wall plate of the crusher box body of the hydraulic shut-off gate 3. A camera monitor is installed outside the camera window, enabling operators in the control room to monitor the bottom slag discharge status in real time. The observation window and inspection windows are used for on-site observation of the internal slag falling situation or the working condition of the extrusion head, and can also be used for operations to handle coking blocks.

[0041] The hydraulic cylinder is fixed on the column of the boiler slag storage hopper through the support cross beam and is connected to the extrusion head push rod with a pin shaft. The surrounding plate assembly is welded under the flange of the boiler slag storage hopper and forms a slag storage space together with the vertical edge of the extrusion head body to prevent the furnace slag from flowing to other parts in the closed state. The hydraulic cylinder is controlled to reverse by the nearby hydraulic valve and powered by the hydraulic pump station, and is connected by stainless steel oil pipes in between to drive the horizontal movement of the extrusion head, realizing the opening and closing of the extrusion head to achieve the purpose of crushing large slag and isolation.

[0042] An integrated treatment device based on boiler bottom slag removal, as shown in the attached Figure 1 graphic model table 1 is as follows:

[0043]

[0044] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A comprehensive treatment device based on boiler bottom ash removal, characterized in that: It includes a mechanical seal (1), a slag pit (2), a hydraulic shut-off door (3), a dry slag discharge machine (4), a camera and lighting device (5), an air volume regulating door (6), an electric hoist (7), a slag crusher (8), a continuous material level meter (9), a high material level meter (10), a vacuum release valve (11), a pulse bag dust collector (12), a slag bin (13), an electromagnetic vibrator (14), a manual plug-in door (15), a pneumatic plug-in door (16), an electric feeder (17), a double-shaft mixer (18), a dry ash bulk loader (19), a temperature sensor (20), an inlet door (21), a blocking switch (22), a first manual ball valve (23), a pipeline pump (24), a check valve (25), a flow regulating valve (26), a pneumatic butterfly valve (27), a tensioning hydraulic station (28), a shut-off door hydraulic station (29), a second manual ball valve (30), and a solenoid valve (31); The electric material feeder (17) comprises a first electric material feeder and a second electric material feeder; The mechanical seal (1) is arranged above the slag pit (2), three hydraulic shut-off doors (3) are arranged below each slag pit (2), a camera and lighting device (5) are arranged on each hydraulic shut-off door (3), a dry slag discharger (4) is connected to the conveying chain of the conveying device, an air volume regulating door (6) and a temperature sensor (20) are arranged above the conveying device, an electric hoist (7) is arranged above the slag bin (13), a slag crusher (8) is connected to the entrance of the slag bin (13), a continuous material level meter (9), a high material level meter (10), and an entry hole door (21) are arranged on the slag bin (13), an electromagnetic vibrator (14) is connected below the slag bin (13), and a manual plug-in door (15) and a pneumatic plug-in door (16) are controlled. The slag bin (13) and the electric material feeder (17) are connected, the first electric material feeder is connected to the double-shaft mixer (18), the second electric material feeder is connected to the dry ash bulk loader (19), the first manual ball valve (23) is connected to the pipeline pump (24), the pipeline pump (24) is connected to the check valve (25), the check valve (25) is connected to the pneumatic butterfly valve (27), the pneumatic butterfly valve (27) is connected to the flow regulating valve (26), the flow regulating valve (26) is connected to the double-shaft mixer (18), the tensioning hydraulic station (28) and the shut-off door hydraulic station (29) are arranged below the conveying device, the second manual ball valve (30) is connected to the solenoid valve (31), and the solenoid valve (31) controls the connection between the hydraulic shut-off door (3) and the spraying water pipeline.

2. A comprehensive treatment device based on boiler bottom ash removal according to claim 1, characterized in that: The first outlet of the slag bin (13) is connected to a dry ash bulk loader (19) via an instrument air compression pipeline, and the second outlet of the slag bin (13) is connected to a double-shaft mixer (18) via an instrument air compression pipeline.

3. A comprehensive treatment device based on boiler bottom ash removal according to claim 1, characterized in that: The first manual ball valve (23), the pipeline pump (24), the check valve (25), the flow regulating valve (26), and the pneumatic butterfly valve (27) are all arranged on the water pipeline.

4. A comprehensive treatment device based on boiler bottom ash removal according to claim 1, characterized in that: The second manual ball valve (30) is arranged on the water pipeline to control the communication between the hydraulic shutoff door (3) and the water pipeline.

5. The comprehensive treatment device based on boiler bottom ash removal according to claim 1 is characterized in that: The conveying device is composed of a conveying chain and an outer shell. A boiler is provided above the slag pit (2). The bottom of the slag pit (2) is respectively connected to the tops of three hydraulic shut-off doors (3). A set of camera and lighting devices (5) is provided on the outer shells of the hydraulic shut-off doors (3).

6. The comprehensive treatment device based on boiler bottom ash removal according to claim 1 is characterized in that: The air volume regulating door (6), the temperature sensor (20), and the material blocking switch (22) are all arranged at the outlet of the conveying device, and a set of camera and lighting devices (5) are arranged on the outer shell of the conveying device.

7. The comprehensive treatment device based on boiler bottom ash removal according to claim 1 is characterized in that: The blocking switch (22) controls the connection between the slag crusher (8) and the transmission device.

8. The comprehensive treatment device based on boiler bottom ash removal according to claim 1 is characterized in that: The conveying chain comprises a double sleeve die forging chain and a group of scale buckets; the conveying bearing of the dry slag discharger (4) is a simply supported shaft; the dry slag discharger (4) is connected to the conveying chain via a pressure wheel.

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