Composite sealing method for oven door device of heat recovery coke oven

Abstract

The invention discloses a composite sealing method for a heat recovery coke oven door device, and the coke oven door device comprises the following mechanisms: an oven door suspension riding wheel, a horizontal bracket assembly, a spring rotating door bolt, a bolt hook mechanism, a filler sealing sleeve of an oven door, a pressing mechanism, a structure between an upper oven door and a lower oven door, an oven door lining, an oven door, a protection plate and the like. Comprising the following steps that 1, position adjustment is conducted, specifically, a furnace door is supported through cooperation of a suspension riding wheel and a horizontal bracket assembly, horizontal and height-direction positioning adjustment treatment is conducted on the furnace door, and after completion, the furnace door horizontally moves along the horizontal bracket assembly when being picked and closed. According to the invention, the flexible sealing material with compression compensation is added between the oven door and the protection plate, so that the influence of unreliable sealing caused by equipment manufacturing, installation and operation is effectively reduced, the burning loss of coke and oven door equipment caused by untight sealing of the oven door is reduced, and the heat preservation and heat energy utilization rate of the coke oven is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of coking equipment, and particularly to a composite sealing method for a hot recovery coke oven door device. Background Art

[0002] A hot recovery coke oven is also called a non-recovery coke oven. The oven door of a conventional hot recovery coke oven is divided into an upper oven door and a lower oven door. The upper oven door is rarely opened after being installed in place, while the lower oven door needs to be opened before each coal charging and coke pushing during normal production. Therefore, the sealing performance between the lower oven door and its sealing surface is very important.

[0003] However, the sealing between the lower oven door of a traditional hot recovery coke oven and its sealing surface generally adopts hard sealing, that is, direct contact between the lower oven door and the sealing surface. And the knife edge of the oven door is deformed or broken due to long-term high temperature, mechanical collision or spring failure, and cannot fit tightly with the oven door frame, resulting in leakage of raw gas (smoking and flaming). The leaked gas not only pollutes the environment, but also burns and damages the furnace protecting iron parts (such as furnace columns and oven frames), accelerating the damage of the furnace body. Summary of the Invention

[0004] Based on the technical problems existing in the background art, the present invention proposes a composite sealing method for a hot recovery coke oven door device.

[0005] The composite sealing method for a hot recovery coke oven door device proposed by the present invention, the coke oven door device includes the following mechanisms, specifically the oven door suspension supporting wheel, the horizontal bracket assembly, the spring rotating door bolt, the bolt hook mechanism, the packing sealing sleeve of the oven door, the pressing mechanism, the structure between the upper and lower oven doors, the oven door lining, the oven door, the protection plate and other structures, and includes the following steps:

[0006] Step 1: Position adjustment: First, support the oven door by cooperating the suspension supporting wheel and the horizontal bracket assembly, and perform horizontal and height positioning adjustment on the oven door. After completion, the oven door moves horizontally along the horizontal bracket assembly when being removed and closed;

[0007] Step 2: Modification of the upper oven door: Modify the lower edge of the original upper oven door that is higher than the protection plate and wider than the width of the carbonization chamber to a lower edge that is as long as the width of the carbonization chamber, and lower the height of the lower edge to be parallel to the protection plate;

[0008] Step 3: Machining of the sealing groove: Milling two mutually parallel sealing grooves at the contact part between the upper oven door and the upper protection plate, and also milling two mutually parallel sealing grooves on the outer wall of the mutually contacting side of the upper protection plate;

[0009] Step 4: Installation of the fiber aerogel strip: Stick the fiber aerogel strip in the double sealing groove with an adhesive. The protruding half of the fiber aerogel strip contacts the double sealing groove milled on the upper protection plate, and use the pressure of the trolley for installing the upper oven door to flatten the fiber aerogel strip and make it fully contact with the protection plate;

[0010] Step Five: Lower furnace door modification: Modify the original integral design of the lower furnace door into five separate components, namely the furnace door body and four detachable cast iron bars with dovetail grooves. The four detachable cast iron bars with dovetail grooves are connected to the furnace door body through heat-resistant bolts, and the height of the cast iron bars on the sealing surface around the lower furnace door is adjusted to the same plane.

[0011] Step Six: Embedding of ceramic fiber flat ropes: Manually embed ceramic fiber flat ropes with good high-temperature resistance, good elastic deformation recovery, and a large number of reuse times into the dovetail grooves. After embedding in place, a flexible sealing body is formed. Using the pressure of the trolley for installing the lower furnace door, the protruding part of the flat rope is flattened, and the flat surface is in full contact with the lower edge of the upper furnace door and the middle and lower protection plates.

[0012] Step Seven: Closing the furnace door: After aligning the furnace door with the furnace head and pressing it down to be fully closed, rotate the spring rotary bolt of the furnace door into the latch slot, cooperate with the latch mechanism to lock and press the furnace door tightly, and the packing seal sleeve of the furnace door forms a relatively closed sealing cavity with the furnace door body and the protection plate.

[0013] Preferably, the furnace door is provided with a guide groove shell for guiding and restricting the shape around the furnace door body, forming a storage cavity for the sealing packing with the furnace door body. The storage cavity is filled with an appropriate amount of subcrystalline zirconia nanofiber aerogel. The packing can be filled in the production state through the rear end of the cavity, and can be pushed forward by the pressing device provided at the rear end to closely fit the gaps of the components forming the cavity, forming a further seal.

[0014] Preferably, the fiber aerogel strip is composed of a pure chromium in the shape of "H" wrapped with subcrystalline zirconia nanofiber aerogel, and the "H"-shaped fiber aerogel strip can be adapted and sealed with the sealing groove.

[0015] Preferably, the furnace door body is provided with supporting and moving idler wheels. By cooperating with the horizontal bracket with the idler wheels, the furnace door is suspended on the horizontal bracket, and at the same time, the horizontal and height positioning of the furnace door is completed.

[0016] Preferably, when the furnace door is picked and closed, the door picking machine mechanism grabs the furnace door and moves it horizontally along the horizontal bracket. Through the guiding slope at the end of the bracket, the load of the furnace door is smoothly transferred between the door picking mechanism and the horizontal bracket.

[0017] Preferably, before the furnace door and the furnace frame are modified and sealed, the hardened tar slag on the surfaces of the furnace door and the furnace frame is cleaned in time to avoid hindering the sealing contact and being ignited by the red coke to cause the furnace door to catch fire.

[0018] Preferably, the inner linings of the furnace door can also overlap and fit tightly with each other in the locked state, forming a stable and reliable heat insulation partition at the joint where the upper and lower furnace doors are combined.

[0019] Preferably, when the furnace door is in a locked state, the inner lining of the furnace door, the protective plate and the furnace head structure can be pressed against each other and tightly pressed, thereby forming a sealed partition and blocking the passage of heat.

[0020] Beneficial effects of the present invention:

[0021] 1. The composite sealing method designed by the present invention adopts double sealing grooves in combination with H-shaped heat-insulating fiber aerogel strips on the end surface contacting the furnace door, and cooperates with the ceramic fiber flat rope at the bottom of the lower furnace door. After the furnace door is closed, the double flexible sealing material can fit tightly to the sealing surface due to its good elasticity and adhesion, effectively fill the tiny gaps and defects of the sealing surface, form a reliable sealing layer, and thus maintain the sealing performance for a long time.

[0022] 2. The composite sealing method designed by the present invention adds a flexible sealing material with compression compensation between the furnace door and the protective plate, which effectively reduces the influence of unreliable sealing caused by equipment manufacturing, installation, and operation, reduces the burning of coke and furnace door equipment caused by loose furnace door sealing, improves the thermal insulation and thermal energy utilization of the coke oven, and effectively extends the service life of the furnace door and sealing auxiliary materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention provides a schematic diagram of the process structure of a composite sealing method for a heat recovery coke oven door device. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0025] Example, see Figure 1 A composite sealing method for a heat recovery coke oven door device, wherein the coke oven door device comprises the following mechanisms, specifically, a door hanging roller, a horizontal bracket assembly, a spring rotating door bolt, a bolt hook mechanism, a packing sealing sleeve of the door, a pressing mechanism, a structure between upper and lower doors, a door lining, a door, a protection plate and other structures, and comprises the following steps:

[0026] Step 1: Position adjustment: First, the furnace door is supported by the hanging roller and the horizontal bracket assembly, and the horizontal and vertical positioning adjustment of the furnace door is completed. After completion, the furnace door moves horizontally along the horizontal bracket assembly when it is removed and closed;

[0027] The furnace door body is provided with supporting and moving idler wheels. By cooperating the idler wheels with the horizontal bracket, the furnace door is suspended on the horizontal bracket, and at the same time, the horizontal and height positioning of the furnace door is completed. When the furnace door is picked and closed, the door picking machine mechanism grabs the furnace door and moves it horizontally along the horizontal bracket. Through the guiding slope at the end of the bracket, the load of the furnace door is smoothly transferred between the door picking mechanism and the horizontal bracket.

[0028] Step 2: Modification of the upper furnace door: The lower edge of the original upper furnace door, which was higher than the protection plate and wider than the width of the carbonization chamber, is changed to a lower edge with the same length as the width of the carbonization chamber, and the height of the lower edge is reduced to be parallel to the protection plate.

[0029] Before the furnace door and the furnace frame are modified and sealed, the hardened tar slag on the surfaces of the furnace door and the furnace frame should be cleaned in time to avoid hindering the sealing contact and being ignited by the red coke, which may cause the furnace door to catch fire.

[0030] Step 3: Machining of the sealing groove: Two mutually parallel sealing grooves are milled at the contact part between the upper furnace door and the upper protection plate, and two mutually parallel sealing grooves are also milled on the outer wall of the upper protection plate where they contact each other.

[0031] Step 4: Installation of the fiber aerogel strip: The fiber aerogel strip is glued in the double sealing groove with an adhesive. The protruding half of the fiber aerogel strip contacts the double sealing groove milled on the upper protection plate. By using the pressure of the trolley for installing the upper furnace door, the fiber aerogel strip is flattened and fully contacts the protection plate.

[0032] The fiber aerogel strip is composed of a pure chromium in the shape of "H" wrapped around a subcrystalline zirconia nanofiber aerogel, and the "H"-shaped fiber aerogel strip can be adapted and sealed with the sealing groove.

[0033] Step 5: Modification of the lower furnace door: The original integral design of the lower furnace door is changed to a combination of five parts, namely the furnace door body and four detachable cast iron strips with dovetail grooves. The four detachable cast iron strips with dovetail grooves are connected to the furnace door body by heat-resistant bolts, and the height of the cast iron strips on the sealing surfaces around the lower furnace door is adjusted to the same plane.

[0034] Step 6: Embedding of the ceramic fiber flat rope: A ceramic fiber flat rope with good high-temperature resistance, good elastic deformation recovery and many reuse times is manually embedded in the dovetail groove. After being embedded in place, a flexible sealing body is formed. By using the pressure of the trolley for installing the lower furnace door, the protruding part of the flat rope is flattened and forms a plane to fully contact the lower edge of the upper furnace door and the middle and lower protection plates.

[0035] Step Seven: Closing the furnace door: After aligning the furnace door with the furnace head and pressing it down to close it completely, rotate the spring rotary bolt of the furnace door into the latch slot and cooperate with the latch mechanism to tightly lock the furnace door. Moreover, the packing seal sleeve of the furnace door and the furnace door body and the protection plate form a relatively enclosed sealing cavity. The inner linings of the furnace door can also overlap and adhere tightly to each other in the locked state, forming a stable and reliable heat insulation partition at the joint where the upper and lower furnace doors are combined.

[0036] By adopting a double-sealing groove and an H-shaped heat-insulating fiber aerogel strip on the end face in contact with the furnace door, and cooperating with the ceramic fiber flat cord at the bottom of the lower furnace door, after the furnace door is closed, the double flexible sealing materials can closely adhere to the sealing surface due to their good elasticity and adhesiveness, effectively filling the tiny gaps and defects on the sealing surface and forming a reliable sealing layer, thereby maintaining the sealing performance for a long time.

[0037] The furnace door is provided with a guide groove shell for guiding and restricting the shape around the furnace door body, forming a storage cavity for the sealing packing with the furnace door body. And an appropriate amount of subcrystalline zirconia nanofiber aerogel is filled inside the storage cavity. The packing can be filled in the production state through the rear end of the cavity, and can be pushed forward by the pressing device arranged at the rear end to closely fit the gaps of the components forming the cavity, forming a further seal. A flexible sealing material with compression compensation is added between the furnace door and the protection plate, effectively reducing the influence of unreliable sealing caused by equipment manufacturing, installation, and operation, reducing the burning damage of coke and furnace door equipment due to the loose sealing of the furnace door, improving the heat preservation and heat energy utilization rate of the coke oven, and effectively prolonging the service life of the furnace door and the sealing auxiliary materials.

[0038] When the furnace door is in the locked state, the inner lining of the furnace door and the protection plate and the furnace head structure can lean against and press each other, blocking the passage of heat while forming a sealing partition.

[0039] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A composite sealing method for a hot recovery coke oven door device, the coke oven door device comprising the following mechanisms, specifically a door hanging supporting wheel, a horizontal bracket assembly, a spring rotating door bolt, a bolt hook mechanism, a packing sealing sleeve of the door, a pressing mechanism, a structure between the upper and lower doors, a door lining, a door, a protection plate and other structures, characterized in that, It includes the following steps: Step 1: Position adjustment: First, support the furnace door by using a hanging supporting wheel and a horizontal bracket assembly, and perform horizontal and height positioning adjustment on the furnace door. After completion, the furnace door moves horizontally along the horizontal bracket assembly when being removed and closed. Step 2: Upper furnace door modification: Modify the lower edge of the upper furnace door, which was originally higher than the protection plate and wider than the width of the carbonization chamber, to a lower edge with the same length as the width of the carbonization chamber, and lower the height of the lower edge to be parallel to the protection plate. Step 3: Sealing groove machining: Mill two mutually parallel sealing grooves at the contact part between the upper furnace door and the upper protection plate, and also mill two mutually parallel sealing grooves on the outer wall of the side where the upper protection plates contact each other. Step 4: Installation of fiber aerogel strips: Use an adhesive to stick the fiber aerogel strips in the double sealing grooves. The protruding half of the fiber aerogel strips contacts the double sealing grooves milled on the upper protection plate. Utilize the pressure of the carriage for installing the upper furnace door to flatten the fiber aerogel strips and make them fully contact with the protection plate. Step 5: Lower furnace door modification: Modify the lower furnace door from the original integral design to a combination of five parts, namely the furnace door body and four detachable cast iron strips with dovetail grooves. The four detachable cast iron strips with dovetail grooves are connected to the furnace door body through heat-resistant bolts, and adjust the height of the cast iron strips on the sealing surfaces around the lower furnace door to the same plane. Step 6: Embedding of ceramic fiber flat ropes: Manually embed ceramic fiber flat ropes with good high-temperature resistance, good elastic deformation recovery performance, and a large number of reuse times into the dovetail grooves. After embedding in place, form a flexible sealing body. Utilize the pressure of the carriage for installing the lower furnace door to flatten the protruding part of the flat ropes to form a plane and make full contact with the lower edge of the upper furnace door and the middle and lower protection plates. Step 7: Furnace door closing: Align the furnace door with the furnace head and press it down to be adjusted and closed completely. Then, rotate the spring rotary bolt of the furnace door into the bolt hook slot, cooperate with the bolt hook mechanism to lock and press the furnace door tightly, and the packing sealing sleeve of the furnace door and the furnace door body and the protection plate form a relatively closed sealing cavity.

2. The composite sealing method of the hot recovery coke oven door device according to claim 1, characterized in that, The furnace door is provided with a guide groove shell for guiding and restricting the shape around the furnace door body, forming a storage cavity for the sealing packing with the furnace door body. And an appropriate amount of subcrystalline zirconia nanofiber aerogel is filled inside the storage cavity. The packing can be filled in the production state through the rear end of the cavity, and can be pushed forward by the pressing device arranged at the rear end to make the gaps between the components forming the cavity fit tightly, forming a further seal.

3. A composite sealing method for a hot recovery coke oven door device according to claim 1, characterized in that, The fiber aerogel strip is composed of a pure chromium in the shape of "H" wrapped with subcrystalline zirconia nanofiber aerogel, and the "H"-shaped fiber aerogel strip can be mutually adapted and sealed with the sealing groove.

4. A composite sealing method for a hot recovery coke oven door device according to claim 1, characterized in that, The furnace door body is provided with supporting and moving supporting wheels. By using the cooperation of the supporting wheels and the horizontal bracket, the furnace door is suspended on the horizontal bracket, and at the same time, the horizontal and height positioning of the furnace door is completed.

5. A composite sealing method for a hot recovery coke oven door device according to claim 4, characterized in that, When the furnace door is being removed and closed, the door removing machine mechanism grabs the furnace door and moves it horizontally along the horizontal bracket. Through the guiding slope at the end of the bracket, the load of the furnace door is smoothly transferred between the door removing mechanism and the horizontal bracket.

6. A composite sealing method for a hot recovery coke oven door device according to claim 1, characterized in that, Before the furnace door and the furnace frame are modified and sealed, clean the hardened tar slag on the surfaces of the furnace door and the furnace frame in time to avoid hindering the sealing contact and being ignited by the red coke to cause the furnace door to catch fire.

7. A composite sealing method for a hot recovery coke oven door device according to claim 1, characterized in that, The inner linings of the furnace doors can also overlap and fit tightly with each other in the closed state, forming a stable and reliable heat insulation partition at the joint where the upper and lower furnace doors are combined.

8. A composite sealing method for a hot recovery coke oven door device according to claim 1, characterized in that, In the closed state of the furnace doors, the inner linings of the furnace doors, the protection plates and the furnace head structures can lean against and press each other tightly, blocking the passage of heat while forming a sealed partition.

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