Process method for reducing breakage frequency of chain of boiler frame chain type slag remover

Abstract

The invention relates to the technical field of boiler slag removal, and discloses a process method for reducing breakage frequency of a chain of a boiler frame chain type slag remover, which specifically comprises the following steps of: 1, modifying a driven wheel structure: lifting a driven wheel which is originally positioned below the water surface to be above the water surface to avoid corrosion caused by long-term soaking of the driven wheel, and additionally arranging a lead screw adjusting device to adjust the structure of the driven wheel; the chain tightness is adjusted in real time by rotating the lead screw, the problem of transmission failure caused by over-looseness of the chain is solved, the problem of corrosion caused by long-term soaking in high-temperature water is avoided by modifying the structure of the driven wheel, meanwhile, the lead screw adjusting device is additionally arranged, the chain tightness can be adjusted in real time, and the problem of transmission failure caused by over-looseness of the chain is effectively solved. Stability and reliability of the device are improved, remarkable technical effects and economic benefits are achieved, and the device has important significance on improvement of boiler slag removal efficiency and guarantee of safe operation of the boiler.

Description

Technical Field

[0001] The present invention relates to the technical field of boiler slag removal, and particularly to a process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover. Background Art

[0002] Boiler ash slag refers to the final product ash slag formed after undergoing certain physical and chemical changes under the high-temperature action of the combustion of minerals in coal in the furnace. Since ash slag can cause problems such as furnace fouling, slagging, corrosion, and heating surface wear in the boiler, affecting the normal operation of the boiler, it is necessary to effectively and timely remove the ash slag. A part of the ash slag is discharged from the slag hopper behind the grate of the stoker-fired boiler, the cold ash hopper at the lower part of the pulverized coal furnace hearth, or the slag discharge port and slag well at the bottom of the liquid slagging boiler, which is called slag discharge. The furnace slag needs to be transported to the slag yard (or ash slag pond) by a boiler slag discharge device, which is called slag removal. The timely transportation and treatment of high-temperature furnace slag is a necessary link for the safe operation of the boiler. Boiler slag discharge must continuously discharge the furnace slag to ensure the continuous and safe operation of the boiler. Most boilers use solid slag discharge, and a few use liquid slag discharge. The slag discharge amount is related to the boiler capacity, coal type, and combustion method.

[0003] During the operation of the traditional boiler frame chain slag remover, the combination of the chain and the axle pin becomes thinner due to long-term wear by the furnace slag, leading to a fracture risk; the furnace slag directly impacts the chain, accelerating the fatigue damage of the chain; the chain and the driven wheel are immersed in high-temperature water for a long time, resulting in serious metal corrosion and temperature difference embrittlement; it is inconvenient to adjust the chain tightness, resulting in the chain being too loose or too tight during operation; the bottom of the slag trough deposits sludge-like furnace slag, increasing the resistance to chain pushing. These problems will lead to a reduction in slag removal efficiency and frequent shutdowns for maintenance, seriously affecting the heating stability of the boiler.

[0004] Therefore, we propose a process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover. Summary of the Invention

[0005] The present invention mainly solves the technical problems existing in the above-mentioned prior art, and provides a process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions. A process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover specifically includes the following steps:

[0007] The first step: Transformation of the structure of the driven wheel: Lift the original driven wheel below the water surface above the water surface to avoid corrosion caused by long-term immersion, and add a lead screw adjustment device to adjust the chain tightness in real time by rotating the lead screw, so as to solve the problem of transmission failure caused by the chain being too loose;

[0008] Step 2: Installation of the submersible jet device: Install a submersible jet device at the tail of the slag trench, introduce external cold air, use air pressure to drive the water flow to flow in the same direction as the chain, and the jet flushes the sludge-like slag at the bottom of the slag trough to reduce the resistance of the chain to push. The cold air reduces the water temperature in the slag trench, reduces the temperature difference, and avoids embrittlement of the metal due to thermal stress;

[0009] Step 3: Auxiliary optimization measures: Lay wear-resistant basalt cast stone lining plates on the contact surface between the chain and the slag trough to reduce the sliding wear of the chain. Regularly apply anti-corrosion coating to the chain and axle pins to extend the service life.

[0010] Preferably, the specific steps of the first step are as follows: Remove the original underwater driven wheel, redesign and install the support bracket so that it is above the water surface, and install a lead screw adjustment mechanism on the side of the support bracket. Push the driven wheel to move axially by rotating the lead screw to realize the dynamic adjustment of the chain tension.

[0011] Preferably, the specific steps of the second step are as follows: Weld a jet pipe at the tail of the slag trench, connect an external air pump, inject cold air into the pipe to form a high-speed jet, and the jet direction is the same as the movement direction of the chain to push the water flow to scour the sediment at the bottom of the slag trough.

[0012] Preferably, the specific steps of the third step are as follows: Check the wear condition of the chain every quarter, supplement the anti-corrosion coating, regularly start the jet device to remove the sediment in the slag trough, and keep the water flow smooth.

[0013] Preferably, the submersible jet device includes an air pump, a cold air delivery pipe and a jet nozzle, and the jet direction is the same as the movement direction of the chain.

[0014] The present invention provides a process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover. It has the following beneficial effects:

[0015] 1. For the process method of reducing the fracture frequency of the chain of a boiler frame chain slag remover, by transforming the structure of the driven wheel, the corrosion problem caused by its long-term immersion in high-temperature water is avoided. At the same time, a lead screw adjustment device is added to adjust the chain tension in real time, effectively solving the problem of transmission failure caused by the chain being too loose, improving the stability and reliability of the equipment. By installing a submersible jet device, introducing external cold air, and using air pressure to drive the water flow to flow in the same direction as the chain, it not only flushes the sludge-like slag at the bottom of the slag trough, reducing the resistance of the chain to push, but also the cold air reduces the water temperature in the slag trench, reduces the temperature difference, and avoids embrittlement of the metal due to thermal stress, further extending the service life of the chain. Through auxiliary optimization measures such as laying wear-resistant basalt cast stone lining plates and regularly applying anti-corrosion coating to the chain and axle pins, the sliding wear of the chain is effectively reduced, the overall durability of the equipment is improved, the maintenance cost is reduced, and it has significant technical effects and economic benefits, which is of great significance for improving the slag removal efficiency of the boiler and ensuring the safe operation of the boiler.

[0016] 2. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover not only optimizes the operation mode of the traditional slag remover, but also fundamentally solves the problem of easy chain fracture.

[0017] 3. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover significantly improves the stability and durability of the slag remover, reduces the number of shutdowns for maintenance caused by chain fracture, and thus ensures the continuous and efficient operation of the boiler.

[0018] 4. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover has good environmental benefits. By effectively removing the sludge-like furnace slag at the bottom of the slag tank, it reduces environmental pollution and conforms to the current concept of green and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a flowchart of the method of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0021] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "inner", "outer", "side", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, terms such as "first", "second", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] Embodiment 1: A process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover, as Figure 1As shown in the figure, it specifically includes the following steps: The first step: Transformation of the driven wheel structure: Lift the original driven wheel located below the water surface above the water surface to avoid corrosion caused by long-term immersion, and add a lead screw adjustment device to adjust the chain tightness in real time by rotating the lead screw, so as to solve the problem of transmission failure caused by the chain being too loose; The second step: Installation of a submersible jet device: Install a submersible jet device at the tail of the slag groove, introduce external cold air, and use air pressure to drive the water flow to flow in the same direction as the chain. The jet flushes the sludge-like slag at the bottom of the slag groove, reducing the pushing resistance of the chain. The cold air reduces the water temperature in the slag groove, reduces the temperature difference, and avoids embrittlement of the metal due to thermal stress; The third step: Auxiliary optimization measures: Lay wear-resistant basalt cast stone lining plates on the contact surface between the chain and the slag groove to reduce the sliding wear of the chain. Regularly apply anti-corrosion coating treatment to the chain and axle pins to extend the service life. The specific steps of the first step are as follows: Remove the original underwater driven wheel, redesign and install the support bracket so that it is located above the water surface, and add a lead screw adjustment mechanism to the side of the support bracket. Push the axial movement of the driven wheel by rotating the lead screw to realize the dynamic adjustment of the chain tightness. The specific steps of the second step are as follows: Weld a jet pipe at the tail of the slag groove, connect an external air pump, inject cold air into the pipe to form a high-speed jet, and the jet direction is the same as the movement direction of the chain, pushing the water flow to flush the sediment at the bottom of the slag groove. The specific steps of the third step are as follows: Check the wear condition of the chain every quarter, supplement the anti-corrosion coating, and regularly start the jet device to remove the sediment in the slag groove to keep the water flow smooth. The submersible jet device includes an air pump, a cold air delivery pipe and a jet nozzle, and the jet direction is the same as the movement direction of the chain. By transforming the driven wheel structure, the corrosion problem caused by its long-term immersion in high-temperature water is avoided. At the same time, a lead screw adjustment device is added to adjust the chain tightness in real time, effectively solving the problem of transmission failure caused by the chain being too loose, improving the stability and reliability of the equipment. By installing a submersible jet device, introducing external cold air, and using air pressure to drive the water flow to flow in the same direction as the chain, it not only flushes the sludge-like slag at the bottom of the slag groove, reducing the pushing resistance of the chain, but also the cold air reduces the water temperature in the slag groove, reduces the temperature difference, and avoids embrittlement of the metal due to thermal stress, further extending the service life of the chain. Through auxiliary optimization measures such as laying wear-resistant basalt cast stone lining plates and regularly applying anti-corrosion coating treatment to the chain and axle pins, the sliding wear of the chain is effectively reduced, the overall durability of the equipment is improved, the maintenance cost is reduced, and it has significant technical effects and economic benefits, which is of great significance for improving the slag removal efficiency of the boiler and ensuring the safe operation of the boiler.

[0027] Embodiment 2: On the basis of Embodiment 1, as Figure 1As shown in the figure, the specific steps of the first step are as follows: Remove the original underwater driven wheel, redesign the mounting bracket to be above the water surface, install a lead screw adjustment mechanism on the side of the bracket, and push the driven wheel to move axially by rotating the lead screw to achieve dynamic adjustment of the chain tension. The specific steps of the second step are as follows: Weld a jet pipe at the tail of the slag trench, connect an external air pump, inject cold air into the pipe to form a high-speed jet, with the jet direction consistent with the movement direction of the chain, and push the water flow to scour the sediment at the bottom of the slag trough. The specific steps of the third step are as follows: Check the wear condition of the chain every quarter, supplement the anti-corrosion coating, regularly start the jet device to remove the sediment in the slag trough, and keep the water flow smooth. The submersible jet device includes an air pump, a cold air delivery pipe and a jet nozzle, and the jet direction is consistent with the movement direction of the chain. By reforming the structure of the driven wheel, the corrosion problem caused by its long-term immersion in high-temperature water is avoided. At the same time, a lead screw adjustment device is added to adjust the chain tension in real time, effectively solving the problem of transmission failure caused by the chain being too loose, improving the stability and reliability of the equipment. By installing a submersible jet device, introducing external cold air, and using air pressure to drive the water flow to flow in the same direction as the chain, not only scours the sludge-like slag at the bottom of the slag trough, reducing the pushing resistance of the chain, but also the cold air reduces the water temperature in the slag trench, reduces the temperature difference, avoids the embrittlement of the metal due to thermal stress, and further extends the service life of the chain. Through auxiliary optimization measures such as laying wear-resistant basalt cast stone linings and regularly applying anti-corrosion coatings to the chain and axle pins, the sliding wear of the chain is effectively reduced, the overall durability of the equipment is improved, the maintenance cost is reduced, and it has significant technical and economic effects, which is of great significance for improving the slag removal efficiency of the boiler and ensuring the safe operation of the boiler.

[0028] Embodiment 3: On the basis of Embodiment 1 and Embodiment 2, as Figure 1 shown, the specific steps of the second step are as follows: Weld a jet pipe at the tail of the slag trench, connect an external air pump, inject cold air into the pipe to form a high-speed jet, with the jet direction consistent with the movement direction of the chain, and push the water flow to scour the sediment at the bottom of the slag trough. The specific steps of the third step are as follows: Check the wear condition of the chain every quarter, supplement the anti-corrosion coating, regularly start the jet device to remove the sediment in the slag trough, and keep the water flow smooth. The submersible jet device includes an air pump, a cold air delivery pipe and a jet nozzle, and the jet direction is consistent with the movement direction of the chain. It not only optimizes the operation mode of the traditional slag remover, but also fundamentally solves the problem of easy chain breakage.

[0029] Embodiment 4: On the basis of Embodiment 1, Embodiment 2 and Embodiment 3, as Figure 1As shown in the figure, the specific steps of the third step are as follows: check the wear condition of the chain every quarter, supplement the anti-corrosion coating, start the jet device regularly to remove the sediment in the slag tank, and keep the water flow smooth. The submersible jet device includes an air pump, a cold air delivery pipeline and a jet nozzle, and the jet direction is consistent with the movement direction of the chain. It significantly improves the stability and durability of the slag remover, reduces the number of shutdowns for maintenance caused by chain breakage, and thus ensures the continuous and efficient operation of the boiler.

[0030] Embodiment 5: On the basis of Embodiment 1, Embodiment 2, Embodiment 3 and Embodiment 4, as Figure 1 shown, the submersible jet device includes an air pump, a cold air delivery pipeline and a jet nozzle, and the jet direction is consistent with the movement direction of the chain. It has good environmental benefits. By effectively removing the sludge-like furnace slag at the bottom of the slag tank, it reduces environmental pollution and conforms to the current concept of green and sustainable development.

[0031] The working principle of the present invention:

[0032] By implementing the above process method, first of all, the transformation of the driven wheel structure avoids the corrosion problem caused by its long-term immersion in high-temperature water. At the same time, the addition of the lead screw adjustment device enables the dynamic adjustment of the chain tightness, effectively solving the problem of transmission failure caused by the chain being too loose or too tight. Secondly, the installation of the submersible jet device uses high-speed jets to scour the sediment at the bottom of the slag tank, which not only reduces the pushing resistance of the chain, but also lowers the water temperature in the slag trench through cold air, reduces the temperature difference, and avoids the embrittlement of the metal due to thermal stress. Finally, the implementation of auxiliary optimization measures, such as laying wear-resistant basalt cast stone linings and regularly treating the chain and shaft pins with anti-corrosion coatings, further reduces the sliding wear of the chain and extends its service life. Under the combined action of these measures, the fracture frequency of the chain of the boiler frame chain slag remover is significantly reduced, the slag removal efficiency is improved, the number of shutdowns for maintenance is reduced, and thus the stability of the boiler heating is ensured.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A process method for reducing the fracture frequency of the chain of a boiler frame chain slag remover, characterized in that, Specifically, it includes the following steps: The first step: Transformation of the driven wheel structure: Lift the original driven wheel located below the water surface above the water surface to avoid corrosion caused by long-term immersion, and add a lead screw adjustment device to adjust the chain tightness in real time by rotating the lead screw, so as to solve the problem of transmission failure caused by the chain being too loose; The second step: Installation of a submersible jet device: Install a submersible jet device at the tail of the slag trench, introduce external cold air, use air pressure to drive the water flow to flow in the same direction as the chain, and the jet flushes the sludge-like slag at the bottom of the slag trench to reduce the resistance of the chain to push. The cold air reduces the water temperature in the slag trench, reduces the temperature difference, and avoids embrittlement of the metal due to thermal stress; The third step: Auxiliary optimization measures: Lay wear-resistant basalt cast stone lining plates on the contact surface between the chain and the slag trench to reduce the sliding wear of the chain, and regularly apply an anti-corrosion coating to the chain and the axle pins to extend the service life.

2. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover according to claim 1, characterized in that: The specific steps of the first step are as follows: Remove the original underwater driven wheel, redesign and install the support so that it is above the water surface, and add a lead screw adjustment mechanism to the side of the support. Push the driven wheel to move axially by rotating the lead screw to achieve dynamic adjustment of the chain tightness.

3. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover according to claim 1, characterized in that: The specific steps of the second step are as follows: Weld a jet pipe at the tail of the slag trench, connect an external air pump, inject cold air into the pipe to form a high-speed jet, and the jet direction is the same as the movement direction of the chain to push the water flow to scour the sediment at the bottom of the slag trench.

4. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover according to claim 1, characterized in that: The specific steps of the third step are as follows: Check the wear condition of the chain every quarter, supplement the anti-corrosion coating, regularly start the jet device to remove the sediment in the slag trench, and keep the water flow smooth.

5. The process method for reducing the fracture frequency of the chain of the boiler frame chain slag remover according to claim 1, characterized in that: The submersible jet device includes an air pump, a cold air delivery pipe and a jet nozzle, and the jet direction is the same as the movement direction of the chain.

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