Automatic Scum Cleaning System and Method for Wet Slag Remover

Abstract

Wet slag removal machine floating slag automatic cleaning system and method, including an en masse conveyor arranged on one side of the wet slag removal machine, and the housing between the wet slag removal machine and the en masse conveyor is connected through a chute pipe; at each slag inlet at the upper end of the wet slag removal machine, a pneumatic push plate mechanism is installed, and the pneumatic push plate mechanism pushes the floating slag at the corresponding slag inlet into the en masse conveyor. The wet slag removal machine floating slag automatic cleaning system and method provided by the present invention can effectively, quickly and conveniently clean the floating slag of the slag removal machine and avoid equipment blockage.

Description

Technical Field

[0001] The present invention relates to a wet slag remover, in particular to a floating slag automatic cleaning system and method for a wet slag remover. Background Art

[0002] After the garbage in a waste incineration power plant is fully burned by a grate furnace, at one end of the incinerator grate, the burned-out slag will fall into the slag remover through a slag dropping pipe chute, while the ash leakage, slag leakage and high-temperature soot of the grate will fall into the lower grate slag conveyor through the ash hopper and be sent to the slag remover. The existing grate slag conveyor in waste incineration power plants uses a wet slag remover, which is usually located at the bottom of the grate furnace. Its function is to collect the ash, slag and high-temperature soot under the grate and discharge the slag into the slag pond. The inside of the wet slag remover is filled with water, and the function of the water is to maintain the sealing of the furnace chamber and cool the falling high-temperature slag, and its sealing effect is very good.

[0003] However, there are also some problems. For example, some slag with a density less than that of water floats on the water surface to form floating slag, which ultimately causes the slag falling from the ash hopper not to normally fall into the slag conveyor, and this easily causes slag blocking accidents; another problem is that during the falling process of the soot, due to the current equipment being restricted by the upstream and surrounding environment, the feeding and discharging chute is small, and the soot will form suspended foam on the water surface. As the ash volume continues to increase, foam floating slag is formed, causing the chute to be blocked, resulting in difficult operation of the upstream equipment and affecting production.

[0004] The only solution in the daily production of waste incineration power plants now is to manually clean the floating slag and suspended foam (collectively referred to as floating slag hereinafter). There is no special floating slag automatic cleaning system on the market to clean the floating slag and suspended foam. Waste incineration power plants will regularly arrange staff to clean a large amount of floating slag every day, which will cause a waste of human resources; manual cleaning will also cause pollution to the ground and the wet slag remover itself, resulting in secondary environmental pollution, which causes great difficulties to the on-site personal safety and civilized production work, and is not conducive to green environmental protection and safe production. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a floating slag automatic cleaning system and method for a wet slag remover, which can automatically complete the cleaning of floating slag in the wet slag remover, reduce a large amount of human resource costs, and at the same time greatly improve the environmental sanitation of the workshop and the wet slag remover itself.

[0006] To solve the above technical problems, the technical solution adopted by the present invention is:

[0007] Wet slag removal machine floating slag automatic cleaning system, including an enclosed scraper conveyor arranged on one side of the wet slag removal machine, and the housing between the wet slag removal machine and the enclosed scraper conveyor is connected through a chute pipe; at each slag inlet at the upper end of the wet slag removal machine, a pneumatic push plate mechanism is installed, and the pneumatic push plate mechanism pushes the floating slag at the corresponding slag inlet into the enclosed scraper conveyor.

[0008] The pneumatic push plate mechanism includes a cylinder or an oil cylinder, the cylinder or the oil cylinder is connected to the push plate, and the left and right sides of the push plate are installed on the guide rail of the slag inlet through a guiding mechanism.

[0009] The enclosed scraper conveyor includes a tail part, an intermediate housing, a scraper chain, an electric control system, a head part, and a driving part. The lower end of the enclosed scraper conveyor is fixed to the ground through legs and is inclined downward from the tail part to the head part and points to the slag pool.

[0010] One side at the lower end of the slag inlet is provided with a slag baffle.

[0011] The guiding mechanism includes a mounting plate, and two sets of traveling wheels are arranged on the mounting plate, and the axes of the two sets of traveling wheels are perpendicular.

[0012] The lower end of the push plate is provided with rake teeth.

[0013] Wet slag removal machine floating slag automatic cleaning method, including the following steps:

[0014] Step 1), the entire automatic floating slag cleaning system is programmed and controlled through the PLC in the electric control system. Each time the automatic floating slag cleaning system runs, the enclosed scraper conveyor is run first; each safety protection device in the electric control system will perform self-inspection on the enclosed scraper conveyor;

[0015] Step 2), after the self-inspection is completed and it is shown that the enclosed scraper conveyor runs without faults, the cylinder of the pneumatic push plate mechanism in the first slag inlet is started, so that the piston rod of the cylinder extends, and the push plate will push the floating slag in the slag inlet where it is located forward until it enters the housing of the enclosed scraper conveyor through the chute pipe;

[0016] Step 3), then, the electromagnetic directional valve of the cylinder will retract the piston rod of the cylinder, and the push plate will return to its original position as the piston rod of the cylinder retracts. So far, the primary floating slag cleaning work of the first slag inlet has been completed;

[0017] Step 4), at this time, the buried scraper conveyor will continue to work. After the slag cleaning work of the first slag inlet is completed, after an interval of a few minutes, the PLC controller will start the piston rod of the cylinder of the pneumatic push plate mechanism in the second slag inlet to extend, and the push plate will move the slag in the slag inlet forward as the piston rod of the cylinder pushes it, and enter the casing of the buried scraper conveyor through the chute. The buried scraper conveyor will transport the fallen slag forward to the slag pool; the water in the wet slag remover that is pushed down with the slag will automatically flow into the slag pool due to the buried scraper conveyor's tilted downward installation arrangement, and will not accumulate in the casing of the buried scraper conveyor to damage the buried scraper conveyor;

[0018] Step 5), then, the electromagnetic reversing valve of the cylinder will retract the piston rod of the cylinder, and the push plate will return to its original position as the piston rod of the cylinder is retracted. At this point, the slag cleaning work of the second slag inlet has been completed. And so on, the slag cleaning work of the third, fourth, and so on is completed in sequence until the slag cleaning work of the last slag inlet is completed;

[0019] Step 6), the PLC controller will control the automatic cleaning of the scum of the wet scum remover to start the automatic cleaning system every few hours. The system can run automatically in a cycle 24 hours a day.

[0020] In step 5), the scraper conveyor is always running. After the last slag inlet is cleaned, the PLC controller will control the scraper conveyor to continue running for a few minutes until all the slag in the casing is transported to the slag pool, and then stop the scraper conveyor; at this point, the automatic cleaning of the slag of the wet slag remover is completed.

[0021] In step 6), during the interval of a few hours, if the inspection staff finds that there is a lot of slag in the slag remover that needs to be cleaned in time when inspecting the production operation, the inspection staff can adjust the "automatic mode" on the electric control box to "manual mode" and manually start the automatic slag cleaning system with one button to complete the automatic slag cleaning work of the wet slag remover.

[0022] The automatic scum cleaning system and method of the wet slag remover of the present invention have the following technical effects:

[0023] 1) Through the programming control of the electric control system (including PLC), the pneumatic push plate mechanism and the buried scraper conveyor can be effectively coordinated to complete the automatic cleaning of the floating slag of the wet slag remover, effectively prevent the slag blocking accident of the wet slag remover, and then reduce the failure rate of the equipment in the later stage.

[0024] 2), The cylinder drives the push plate to push the floating slag into the scraper conveyor, and then the scraper conveyor transports the floating slag to the slag pool. Since the scraper conveyor is installed downward, the water in the wet slag remover pushed down together with the floating slag will automatically flow into the slag pool. This process is a fully automated process, eliminating the need for additional dedicated personnel to perform related operations, saving the user's labor cost; at the same time, it effectively prevents the outflow of sewage during the cleaning of floating slag, causing secondary pollution, enabling the user to meet the requirements of green environmental protection and safe production.

[0025] 3), By setting a slag baffle, it can effectively prevent the floating slag from returning to the tail of the wet slag remover.

[0026] 4), Since the scraper conveyor belongs to a mature technology, and other components such as cylinders and push plates have simple structures and are easy to process and manufacture, the one-time investment cost is small. At the same time, the wearing parts are easy to replace, reducing the manual workload of the user during the production process.

[0027] 5), The scraper conveyor is arranged side by side with the wet slag remover, occupying a small space and being easy to install.

[0028] 6), The slag removal at the slag inlet is carried out sequentially from the head to the tail. In this way, the time interval can be set shorter, and the pushed floating slag can be pushed into the slag pool faster. Removing slag one by one at each slag inlet is to reduce the load of the scraper conveyor and avoid the problem of material blockage in the scraper conveyor caused by simultaneous slag removal; secondly, for simultaneous slag removal, the conveying capacity of the scraper conveyor needs to be large, so the model also needs to be larger, increasing the user's usage cost. At the same time, the site space is generally limited, and it is not practical to use a large-scale scraper conveyor; finally, using a small-scale scraper conveyor means that the time for removing slag once is a bit longer, but this will not have much impact.

[0029] 7), The scraper conveyor is used for transporting the floating slag. The scraper conveyor has good practicability, environmental protection, low cost, and reliable operation; the scraper conveyor can also be replaced with a screw conveyor, but the screw conveyor has poor operation reliability and is prone to breakdown. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the drawings and embodiments:

[0031] Figure 1 is the front view of the present invention.

[0032] Figure 2 is Figure 1 the cross-sectional view at A in

[0033] Figure 3 is Figure 2 the schematic view in the K direction in

[0034] In the figure: wet slag remover 1, scraper conveyor 2, chute pipe 3, pneumatic push plate mechanism 4, cylinder 5, push plate 6, guiding mechanism 7, guide rail 8, slag inlet 9, slag pool 10, tail part 11, intermediate housing 12, scraper chain 13, support leg 14, electric control system 15, head part 16, driving part 17, slag baffle 18, rake teeth 6-1, mounting plate 7-1, running wheel 7-2. Detailed implementation mode

[0035] As Figure 1 shown, the floating slag automatic cleaning system of the wet slag remover includes a scraper conveyor 2 arranged on one side of the wet slag remover 1. The width of the scraper conveyor is about 250 mm. The scraper conveyor 2 includes a tail part 11, an intermediate housing 12, a scraper chain 13, an electric control system 15, a head part 16, and a driving part 17. The lower end of the scraper conveyor 2 is fixed to the ground through support legs 14 and is inclined downward from the tail part 11 to the head part 16 and points to the slag pool 10.

[0036] There are multiple slag inlets 9 on the wet slag remover 1. One side of each slag inlet 9 is connected to the scraper conveyor 2 as a whole through a chute pipe 3. And a pneumatic push plate mechanism 4 is installed at each slag inlet 9. The pneumatic push plate mechanism 4 includes a cylinder 5 (the air source is compressed air with a pressure of 0.6 Mpa). The cylinder 5 in this application can also be replaced by an oil cylinder. The cylinder 5 is connected to the push plate 6 through a pin shaft. The push plate 6 is installed on the guide rail 8 of the slag inlet through a guiding mechanism 7 on the left and right. The guiding mechanism 7 includes a mounting plate 7-1. There are two groups of running wheels 7-2 on the mounting plate 7-1. The axes of the two groups of running wheels 7-2 are perpendicular. The corresponding guide rails 8 are also two groups. The positioning and support of the push plate 6 can be realized through the two perpendicular groups of running wheels, and at the same time, the friction when the push plate 6 moves back and forth under the action of the cylinder 5 is also reduced.

[0037] One side at the lower end of the slag inlet 9 is provided with a slag baffle 18. The slag baffle 18 is an angle steel of No. 63. The slag baffle 18 mainly prevents the floating slag from returning to the tail part of the wet slag remover.

[0038] The lower end of the push plate 6 is provided with rake teeth 6-1. The main function is to filter water. If it is a solid plate, when the push plate is pushed forward, the water will run away from both sides, and the floating slag will also run away from both sides with the water.

[0039] Working principle and process:

[0040] 1). The PLC in the electric control system is used to program and control the entire automatic floating slag cleaning system. Each time the automatic floating slag cleaning system runs, the scraper conveyor 2 is run first; each safety protection device in the electric control system will conduct self-inspection on the scraper conveyor 2.

[0041] 2) After the self-test is completed and shows that the scraper conveyor 2 is running without fault, the cylinder 5 of the pneumatic push plate mechanism 4 in the first slag inlet 9 will be started, so that the piston rod of the cylinder 5 will be extended. The push plate 6 will move the slag at the slag inlet 9 forward as the piston rod of the cylinder 5 pushes it until it enters the casing of the scraper conveyor 2 through the chute 3.

[0042] 3) Then, the electromagnetic reversing valve of the cylinder 5 will retract the piston rod of the cylinder 5, and the push plate 6 will return to its original position as the piston rod of the cylinder 5 is retracted. At this point, the slag cleaning work of the first slag inlet has been completed.

[0043] 4) At this time, the scraper conveyor 2 will continue to work. After the slag cleaning work of the first slag inlet is completed, after a few minutes, the PLC controller will start the piston rod of the cylinder 5 of the pneumatic push plate mechanism 4 in the second slag inlet to extend, and the push plate 6 will move the slag in the slag inlet 9 forward with the push of the piston rod of the cylinder 5, and enter the casing of the scraper conveyor 2 through the chute 3. The scraper conveyor 2 will transport the fallen slag forward to the slag pool; the water in the wet slag remover 1 pushed down with the slag will automatically flow into the slag pool 10 due to the inclined downward installation arrangement of the scraper conveyor, and will not accumulate in the casing of the scraper conveyor 2 to damage the scraper conveyor.

[0044] 5) Then, the electromagnetic reversing valve of the cylinder 5 will retract the piston rod of the cylinder 5, and the push plate 6 will return to its original position as the piston rod of the cylinder 5 is retracted. So far, the slag cleaning work of the second slag inlet has been completed. And so on, the slag cleaning work of the third, fourth, and last slag inlet is completed in sequence.

[0045] During this process, the scraper conveyor 2 is always running. After the last slag inlet 9 is cleaned, the PLC controller will control the scraper conveyor 2 to continue running for 10 minutes (the time can be adjusted) until all the slag in the casing is transported to the slag pool, and then stop the operation of the scraper conveyor 2. At this point, the automatic cleaning of the slag of the wet slag remover is completed.

[0046] 6) The PLC controller will control the automatic cleaning system to start and complete the automatic cleaning of the slag of the wet slag remover every 4 hours (the time can be adjusted). The system can run automatically in a cycle 24 hours a day. In addition, during the 4-hour interval, if the inspection staff finds that there is a lot of slag in the slag remover that needs to be cleaned in time when inspecting the production operation, the inspection staff can adjust the "automatic mode" on the electric control box to "manual mode" and manually start the automatic cleaning system to complete the automatic cleaning of the slag of the wet slag remover.

Claims

1. Automatic cleaning method of slag in wet slag remover, Features: The invention comprises an automatic cleaning system for floating slag of a wet slag remover, the cleaning system comprising an embedded scraper conveyor (2) arranged on one side of the wet slag remover (1), the housings of the wet slag remover (1) and the embedded scraper conveyor (2) being connected via a chute (3); a pneumatic push plate mechanism (4) is installed at each slag inlet (9) at the upper end of the wet slag remover (1), the pneumatic push plate mechanism (4) pushes floating slag at the corresponding slag inlet (9) into the embedded scraper conveyor (2); The wet slag remover (1) has a plurality of slag inlets (9), and one side of each slag inlet (9) is connected to the buried scraper conveyor (2) via a chute (3) to form a whole; The buried scraper conveyor and the wet slag remover are arranged side by side; The lower end of the buried scraper conveyor (2) is fixed to the ground through a support leg (14) and is inclined downward from the tail (11) to the head (16) toward the slag pool (10); The automatic cleaning method of scum of a wet slag remover comprises the following steps: Step 1), the entire automatic slag cleaning system is programmed and controlled by the PLC in the electric control system. Each time the automatic slag cleaning system is operated, the scraper conveyor (2) is operated first; each safety protection device in the electric control system will perform a self-check on the scraper conveyor (2); Step 2), after the self-check is completed and it is shown that the scraper conveyor (2) is running without fault, the cylinder (5) of the pneumatic push plate mechanism (4) in the first slag inlet is started, so that the piston rod of the cylinder (5) is extended, and the push plate (6) moves the floating slag in the slag inlet (9) forward as the piston rod of the cylinder (5) pushes it until it enters the casing of the scraper conveyor (2) through the chute (3); Step 3), then, the electromagnetic reversing valve of the cylinder (5) will retract the piston rod of the cylinder (5), and the push plate (6) will return to its original position as the piston rod of the cylinder (5) is retracted; At this point, the slag cleaning work at the first slag inlet has been completed; Step 4), at this time, the buried scraper conveyor (2) will continue to work; After the slag cleaning work of the first slag inlet is completed, after a few minutes, the PLC controller will start the piston rod of the cylinder (5) of the pneumatic push plate mechanism (4) in the second slag inlet to extend, and the push plate (6) will move the slag in the slag inlet (9) forward as the piston rod of the cylinder (5) pushes it, and enters the casing of the buried scraper conveyor (2) through the chute (3); The buried scraper conveyor (2) will transport the fallen scum forward to the scum pool; the water in the wet slag remover (1) that is pushed down along with the scum will also automatically flow into the slag pool (10) due to the buried scraper conveyor being installed and arranged tilted downward, and will not accumulate in the casing of the buried scraper conveyor (2) to damage the buried scraper conveyor; Step 5), then, the electromagnetic reversing valve of the cylinder (5) will retract the piston rod of the cylinder (5), and the push plate (6) will return to its original position as the piston rod of the cylinder (5) is retracted; At this point, the slag cleaning work of the second slag inlet has been completed; And so on, the slag cleaning work of the third, fourth, and last slag inlet is completed; Step 6), the PLC controller will control the automatic slag cleaning work of the wet slag remover in the automatic slag cleaning system to be started every few hours. This system can operate automatically in a 24-hour cycle throughout the day.

2. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: The pneumatic push plate mechanism (4) includes a cylinder (5) or an oil cylinder. The cylinder (5) or the oil cylinder is connected to the push plate (6), and the push plate (6) is installed on the guide rail (8) at the slag inlet through a guiding mechanism (7) on the left and right.

3. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: The scraper conveyor (2) includes a tail part (11), an intermediate housing (12), a scraper chain (13), an electric control system (15), a head part (16), and a driving part (17).

4. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: A slag baffle (18) is provided on one side at the lower end of the slag inlet (9).

5. The automatic slag cleaning method for the wet slag remover according to claim 2, characterized in that: The guiding mechanism (7) includes a mounting plate (7-1). Two sets of traveling wheels (7-2) are provided on the mounting plate (7-1), and the axes of the two sets of traveling wheels (7-2) are perpendicular.

6. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: Rake teeth (6-1) are provided at the lower end of the push plate (6).

7. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: In step 5), the scraper conveyor (2) is always kept operating; After the slag cleaning work at the last slag inlet (9) is completed, the PLC controller will control the scraper conveyor (2) to continue running for a few minutes until all the slag in the casings is conveyed to the slag pool, and then stop the operation of the scraper conveyor (2); thus, the automatic slag cleaning work of the wet slag remover is completed.

8. The automatic slag cleaning method for the wet slag remover according to claim 1, characterized in that: In step 6), during the interval of several hours, if the inspection staff finds that there is a lot of slag in the slag remover that needs to be cleaned in time when inspecting the production operation situation, the inspection staff can adjust the "automatic mode" on the electric control box to the "manual mode" and start the automatic slag cleaning system with one key to complete the automatic slag cleaning work of the wet slag remover.

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