Horizontal heat recovery coke oven

Abstract

The embodiment of the utility model provides a horizontal heat recovery coke oven, and relates to the technical field of coking. The multiple fixing grooves are formed in the edge of one of the furnace door and the protection plate at intervals, and the first sealing pieces are arranged in the fixing grooves, so that mechanical sealing is achieved between the furnace door and the protection plate. The sealing space is defined by the two adjacent first sealing pieces, the furnace door and the protection plate, and inert gas is continuously introduced into the sealing space through the gas flow channel, so that gas film sealing is achieved between the furnace door and the protection plate. By adopting a mode of combining gas film sealing and mechanical sealing, on one hand, external air can be more effectively prevented from leaking into the coke oven through the leakage part of the oven door, the sealing effect between the oven door and the protection plate is improved, the burn-out rate of coke in the coking process is reduced, the productivity is improved, and the service life of the oven door is prolonged; and on the other hand, the consumption of sealed refractory materials is reduced, the sealing workload of furnace workers is reduced, and the sealing time of the furnace workers is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of coking, in particular to a horizontal heat recovery coke oven. Background Art

[0002] As the domestic steel industry's production capacity approaches saturation and environmental protection requirements become increasingly stringent, energy conservation, emission reduction and clean production in the coking industry are imperative. In the early 1990s, a horizontal heat recovery coke oven was built. The obvious feature of the horizontal heat recovery coke oven is that it does not emit smoke and dust during the coking process, and basically does not cause pollution to the atmospheric environment. Since it does not recover chemical products and purify coke oven gas, it does not produce sewage and does not pollute water resources.

[0003] However, the furnace door of the horizontal heat recovery coke oven has the problem of air leakage. Specifically, the furnace door of the horizontal heat recovery coke oven is usually divided into an upper furnace door and a lower furnace door. The upper furnace door is rarely opened after it is installed in place, while in the normal production process of the coke oven, the lower furnace door needs to be opened before each coal loading and coke pushing. The main problem of the heat recovery coke oven is that the lower furnace door is not tightly sealed. Its carbonization chamber is operated under negative pressure, and air can easily leak in. After the air leaks in, the raw coal gas and coke in the furnace are partially burned at the place where the air leaks into the furnace door, generating high temperature, causing serious deformation of the furnace door, and easily leading to coke burning, reduced production capacity, and increased energy consumption.

[0004] At present, coking plants use refractory materials to plug the leaks of horizontal heat recovery coke oven doors in order to solve the problem of loose sealing of the lower oven door. However, the method of plugging with refractory materials requires one oven to be sealed, which requires heavy workload and long working hours for the workers in front of the oven, and consumes a lot of refractory materials. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a horizontal heat recovery coke oven to reduce the consumption of refractory materials and reduce the workload and working time of workers in front of the oven for sealing. The specific technical solution is as follows:

[0006] An embodiment of the present application provides a horizontal heat recovery coke oven, comprising:

[0007] A furnace body having a carbonization chamber, wherein the carbonization chamber has an opening communicating with the outside;

[0008] A furnace door, disposed at the opening;

[0009] A protection plate is arranged on the outer surface of the furnace body, the furnace door is detachably connected to the protection plate, and the furnace door is used to block the opening;

[0010] The edge of one of the furnace door and the protection plate is provided with a plurality of fixing grooves at intervals, and each of the fixing grooves is provided with a first sealing member; one end of the first sealing member is located in the fixing groove, and the other end of the first sealing member extends out of the fixing groove and abuts against the protection plate or the furnace door; two adjacent first sealing members, the furnace door and the protection plate are arranged to form a sealed space; the other of the furnace door and the protection plate is provided with an air flow channel, the outlet of the air flow channel is connected to the sealed space, and the inlet of the air flow channel is connected to the outside, and the air flow channel is used to introduce inert gas from the outside.

[0011] In an embodiment of the present application, the first sealing member includes a sealing ring made of a heat-resistant flexible material.

[0012] In an embodiment of the present application, the width of the fixing groove opening is smaller than the width of the fixing groove bottom.

[0013] In an embodiment of the present application, a bottom width of the first sealing member is greater than a top width of the first sealing member.

[0014] In an embodiment of the present application, an adhesive is provided between the inner wall of the fixing groove and the first sealing member.

[0015] In an embodiment of the present application, the air flow channel includes a gradually expanding section and a connecting section, the first end of the connecting section is connected to the inlet, the second end of the connecting section is connected to the first end of the gradually expanding section, the second end of the gradually expanding section is connected to the outlet, and the diameter of the first end of the gradually expanding section is smaller than the diameter of the second end of the gradually expanding section.

[0016] In an embodiment of the present application, the inlet is provided with a quick connector.

[0017] In an embodiment of the present application, the inlet is provided with a filter.

[0018] In an embodiment of the present application, a second sealing member is provided between the protection plate and the furnace body.

[0019] In an embodiment of the present application, a lining is provided on the side of the furnace door facing the carbonization chamber.

[0020] The horizontal heat recovery coke oven provided by the embodiment of the utility model is provided with a plurality of fixed grooves at intervals on the edge of one of the furnace door and the protective plate, and a first sealing member is provided in the fixed groove, so as to achieve a mechanical seal between the furnace door and the protective plate. A sealed space is formed by enclosing two adjacent first sealing members, the furnace door and the protective plate, and an inert gas is continuously introduced into the sealed space through an air flow channel, so as to achieve an air film seal between the furnace door and the protective plate. The combination of air film seal and mechanical seal can, on the one hand, more effectively prevent external air from leaking into the coke oven through the leakage of the furnace door, improve the sealing effect between the furnace door and the protective plate, reduce the burning rate of coke during the coking process, increase production capacity, and extend the service life of the furnace door; on the other hand, it can reduce the consumption of refractory materials for sealing, reduce the workload of workers in front of the furnace for sealing, and shorten the time required for workers in front of the furnace to seal.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 One of the schematic diagrams of the top view of the horizontal heat recovery coke oven provided in the embodiment of the present application;

[0024] Figure 2 for Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0025] Figure 3 The second schematic diagram of the top view of the horizontal heat recovery coke oven provided in the embodiment of the present application;

[0026] Figure 4 for Figure 3 Schematic diagram of the local enlarged structure at point B in the middle.

[0027] Furnace body 100; carbonization chamber 110; opening 111; furnace door 200; fixing groove 210; first sealing member 220; sealed space 230; air flow channel 240; outlet 241; inlet 242; gradually expanding section 243; connecting section 244; quick connector 245; lining 250; protection plate 300; second sealing member 310. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field based on this application belong to the scope of protection of the utility model.

[0029] As mentioned in the background technology, the current coking plant uses refractory materials to fill the leaking parts of the horizontal heat recovery coke oven door to solve the problem of loose sealing of the lower oven door. However, the method of using refractory materials to fill the leaking parts requires one oven to be sealed, which requires a large workload and long working hours for the workers in front of the oven, and consumes a large amount of refractory materials.

[0030] Figure 1 This is one of the top view structural schematic diagrams of the horizontal heat recovery coke oven provided in the embodiment of the present application. Figure 2 for Figure 1 The local enlarged structural diagram at A in the middle, Figure 3 The second schematic diagram of the top view of the horizontal heat recovery coke oven provided in the embodiment of the present application is as follows: Figure 4 for Figure 3 The local enlarged structural diagram at B is as follows: Figures 1 to 4 As shown, the horizontal heat recovery coke oven includes a furnace body 100, a furnace door 200 and a protective plate 300. The furnace body 100 has a carbonization chamber 110, and the carbonization chamber 110 has an opening 111 connected to the outside. The furnace door 200 is arranged at the opening 111, and the protective plate 300 is arranged on the outer surface of the furnace body 100. The furnace door 200 and the protective plate 300 are detachably connected, and the furnace door 200 is used to block the opening 111. A plurality of fixing grooves 210 are arranged at intervals on the edge of one of the furnace door 200 and the protective plate 300, and each fixing groove 210 is provided with a first sealing member 220. One end of the first sealing member 220 is located in the fixing groove 210, and the other end of the first sealing member 220 extends out of the fixing groove 210 and abuts against the protective plate 300 or the furnace door 200. Two adjacent first sealing members 220, furnace door 200 and protective plate 300 are arranged to form a sealed space 230. The other of the furnace door 200 and protective plate 300 is provided with an airflow channel 240. An outlet 241 of the airflow channel 240 is connected to the sealed space 230, and an inlet 242 of the airflow channel 240 is connected to the outside. The airflow channel 240 is used to introduce inert gas from the outside.

[0031] The horizontal heat recovery coke oven provided by the embodiment of the utility model is provided with a plurality of fixed grooves 210 at intervals on the edge of one of the furnace door 200 and the protection plate 300, and a first sealing member 220 is provided in the fixed groove 210, so as to realize mechanical sealing between the furnace door 200 and the protection plate 300. A sealed space 230 is formed by enclosing two adjacent first sealing members 220, the furnace door 200 and the protection plate 300, and an inert gas is continuously introduced into the sealed space 230 through the air flow channel 240, so as to realize air film sealing between the furnace door 200 and the protection plate 300. The combination of air film sealing and mechanical sealing can more effectively prevent external air from leaking into the coke oven through the leakage of the furnace door 200, improve the sealing effect between the furnace door 200 and the protection plate 300, reduce the burning rate of coke in the coking process, improve production capacity, and extend the service life of the furnace door 200; on the other hand, it can reduce the consumption of sealing refractory materials, reduce the workload of the workers in front of the furnace for sealing, and shorten the time required for the workers in front of the furnace for sealing.

[0032] It should be noted that the furnace door 200 of the present application is a lower furnace door. During the operation of the horizontal heat recovery coke oven, the lower furnace door must be opened once before each coal loading and coke pushing. The inert gas can be argon, nitrogen, etc., or it can be coke oven exhaust gas with an oxygen content of less than 1%. The inert gas can come from a separate ground transportation system or from the transportation system of the horizontal heat recovery coke oven. The inert gas has a low pressure, a good sealing effect, and a small amount of use, and the cost is much lower than the coke loss caused by leakage of the furnace door 200.

[0033] When the protective plate 300 is provided with an airflow channel 240 , the airflow channel 240 may be fixedly connected to an inert gas pipeline on the ground, so that the inert gas pipeline may be used on site to directly introduce inert gas into the airflow channel 240 .

[0034] In an embodiment of the utility model, the first seal 220 includes a sealing ring made of a heat-resistant flexible material. That is, the material of the first seal 220 is a high-temperature resistant flexible material. By providing the first seal 220 of a high-temperature resistant flexible material, on the one hand, the first seal 220 can maintain stable performance in a high-temperature environment, and on the other hand, the first seal 220 can undergo elastic deformation and fully squeeze and contact with the inner wall of the fixed groove 210 under the action of an external force, thereby improving the sealing effect of the first seal 220. Therefore, by providing the first seal 220 of a high-temperature resistant flexible material, it is possible to further reduce the entry of external air into the heat recovery coke oven, reduce the loss of coke and damage to the furnace door 200, and increase the number of effective uses and effective use time of the first seal 220.

[0035] In the embodiment of the present utility model, Figure 2 and Figure 4As shown, the width of the notch of the fixing groove 210 is smaller than the width of the bottom of the fixing groove 210. Since the width of the notch of the fixing groove 210 is smaller than the width of the bottom of the fixing groove 210, the notch can limit the first sealing member 220 located at the bottom of the fixing groove 210 from being separated from the fixing groove 210, thereby preventing the first sealing member 220 from being separated from the fixing groove 210 when the furnace door 200 is removed, thereby affecting the use of the first sealing member 220 when the furnace door 200 is hung again. The fixing groove 210 may be a dovetail groove, that is, the horizontal cross-sectional shape of the fixing groove 210 is a trapezoid.

[0036] In the embodiment of the present utility model, Figure 2 and Figure 4 As shown, the bottom width of the first seal 220 is greater than the top width of the first seal 220. The first seal 220 with a bottom width greater than the top width is adapted to the fixing groove 210 with a notch width less than the bottom, which increases the contact area between the first seal 220 and the inner wall of the fixing groove 210 and improves the sealing performance, and enhances the limiting effect of the notch on the bottom of the first seal 220.

[0037] In the embodiment of the utility model, an adhesive is provided between the inner wall of the fixing groove 210 and the first sealing member 220. The surface of the first sealing member 220 is bonded to the inner wall of the fixing groove 210 by the adhesive, thereby enhancing the connection strength between the first sealing member 220 and the fixing groove 210, and preventing the first sealing member 220 from being separated from the fixing groove 210 when the furnace door 200 is removed, thereby affecting the use of the first sealing member 220 when the furnace door 200 is hung again.

[0038] In the embodiment of the present utility model, Figure 2 and Figure 4 As shown, the airflow channel 240 includes a gradually expanding section 243 and a connecting section 244. The first end of the connecting section 244 is connected to the inlet 242, the second end of the connecting section 244 is connected to the first end of the gradually expanding section 243, the second end of the gradually expanding section 243 is connected to the outlet 241, and the diameter of the first end of the gradually expanding section 243 is smaller than the diameter of the second end of the gradually expanding section 243. When the inert gas enters the airflow channel 240 from the inlet 242, the inert gas first enters the connecting section 244 and then enters the gradually expanding section 243. Since the diameter of the first end of the gradually expanding section 243 is smaller than the diameter of the second end of the gradually expanding section 243, the airflow pressure decreases and the airflow range increases during the flow of the inert gas from the first end of the gradually expanding section 243 to the second end of the gradually expanding section 243, so that the inert gas quickly fills the entire sealed space 230 to achieve a sealing effect.

[0039] In the embodiment of the present utility model, Figure 2 and Figure 4As shown, the inlet 242 is provided with a quick connector 245. When it is necessary to introduce inert gas into the airflow channel 240, the quick connector 245 is quickly connected to the inert gas delivery device to quickly introduce inert gas into the airflow channel 240, making it more convenient to introduce inert gas, reducing the workload of furnace workers for sealing, and shortening the time required for furnace workers to perform sealing.

[0040] In the embodiment of the utility model, a filter is provided at the inlet 242. The filter can filter the inert gas about to enter the airflow channel 240, so as to prevent impurities in the inert gas from entering the airflow channel 240 and blocking the airflow channel 240, thereby failing to achieve the effect of air film sealing.

[0041] In the embodiment of the present utility model, Figure 1 and Figure 3 As shown, a second sealing member 310 is provided between the protection plate 300 and the furnace body 100. The protection plate 300 may be a metal plate. By providing the protection plate 300, on the one hand, the continuous expansion of the furnace body 100 can be effectively protected and limited. On the other hand, the furnace door 200 can be detachably connected to the protection plate 300, and the furnace door 200 can be fixed to the opening 111 to achieve the blocking of the opening 111.

[0042] In the embodiment of the present utility model, Figure 1 and Figure 3 As shown, a lining 250 is provided on one side of the furnace door 200 facing the carbonization chamber 110. The lining 250 can provide a heat insulation effect to prevent the heat in the carbonization chamber 110 from being transferred to the outside through the furnace door 200.

[0043] Combine the following Figures 1 to 4 Describe a specific embodiment of the present application, such as Figures 1 to 4 As shown, the horizontal heat recovery coke oven includes a furnace body 100, a furnace door 200 and a protective plate 300. The furnace body 100 has a carbonization chamber 110, and the carbonization chamber 110 has an opening 111 connected to the outside. The furnace door 200 is arranged at the opening 111, and the protective plate 300 is arranged on the outer surface of the furnace body 100. The furnace door 200 and the protective plate 300 are detachably connected, and the furnace door 200 is used to block the opening 111. A second sealing member 310 is arranged between the protective plate 300 and the furnace body 100. A lining 250 is arranged on the side of the furnace door 200 facing the carbonization chamber 110.

[0044] A plurality of fixed grooves 210 are arranged at intervals on the edge of one of the furnace door 200 and the protection plate 300, and each fixed groove 210 is provided with a first seal 220. One end of the first seal 220 is located in the fixed groove 210, and the other end of the first seal 220 extends out of the fixed groove 210 and abuts against the protection plate 300 or the furnace door 200. Two adjacent first seals 220, the furnace door 200 and the protection plate 300 are surrounded to form a sealed space 230, and the other of the furnace door 200 and the protection plate 300 is provided with an air flow channel 240, the outlet 241 of the air flow channel 240 is connected to the sealed space 230, and the inlet 242 of the air flow channel 240 is connected to the outside, and the air flow channel 240 is used to pass inert gas from the outside. The first seal 220 includes a sealing ring made of a flexible material. The bottom width of the first seal 220 is greater than the top width of the first seal 220. The width of the notch of the fixed groove 210 is less than the width of the bottom of the fixed groove 210.

[0045] The air flow channel 240 includes a gradually expanding section 243 and a connecting section 244, wherein a first end of the connecting section 244 is connected to an inlet 242, a second end of the connecting section 244 is connected to a first end of the gradually expanding section 243, and a second end of the gradually expanding section 243 is connected to an outlet 241, wherein a diameter of the first end of the gradually expanding section 243 is smaller than a diameter of the second end of the gradually expanding section 243. A quick connector 245 is provided at the inlet 242.

[0046] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims

1. A horizontal heat recovery coke oven, characterized in that: include: The furnace body (100) has a carbonization chamber (110), wherein the carbonization chamber (110) has an opening (111) communicating with the outside; A furnace door (200) disposed at the opening (111); a protection plate (300) disposed on the outer surface of the furnace body (100); the furnace door (200) is detachably connected to the protection plate (300); and the furnace door (200) is used to block the opening (111); A plurality of fixing grooves (210) are arranged at intervals on the edge of one of the furnace door (200) and the protection plate (300), and each of the fixing grooves (210) is provided with a first sealing member (220); one end of the first sealing member (220) is located in the fixing groove (210), and the other end of the first sealing member (220) extends out of the fixing groove (210) and abuts against the protection plate (300) or the furnace door (200); two adjacent first sealing members (220), the furnace door (200) and the protection plate (300) are arranged to form a sealed space (230); the other of the furnace door (200) and the protection plate (300) is provided with an air flow channel (240), an outlet (241) of the air flow channel (240) is communicated with the sealed space (230), an inlet (242) of the air flow channel (240) is communicated with the outside, and the air flow channel (240) is used to introduce inert gas from the outside.

2. The horizontal heat recovery coke oven according to claim 1, characterized in that: The first sealing member (220) comprises a sealing ring made of a heat-resistant flexible material.

3. The horizontal heat recovery coke oven according to claim 2, characterized in that: The width of the notch of the fixing groove (210) is smaller than the width of the bottom of the fixing groove (210).

4. The horizontal heat recovery coke oven according to claim 3, characterized in that: The bottom width of the first sealing member (220) is greater than the top width of the first sealing member (220).

5. The horizontal heat recovery coke oven according to claim 4, characterized in that: An adhesive is provided between the inner wall of the fixing groove (210) and the first sealing member (220).

6. The horizontal heat recovery coke oven according to claim 1, characterized in that: The air flow channel (240) comprises a gradually expanding section (243) and a connecting section (244); a first end of the connecting section (244) is connected to the inlet (242); a second end of the connecting section (244) is connected to the first end of the gradually expanding section (243); a second end of the gradually expanding section (243) is connected to the outlet (241); and a diameter of the first end of the gradually expanding section (243) is smaller than a diameter of the second end of the gradually expanding section (243).

7. The horizontal heat recovery coke oven according to any one of claims 1 to 6, characterized in that: The inlet (242) is provided with a quick connector (245).

8. The horizontal heat recovery coke oven according to any one of claims 1 to 6, characterized in that: The inlet (242) is provided with a filter.

9. The horizontal heat recovery coke oven according to any one of claims 1 to 6, characterized in that: A second sealing member (310) is provided between the protection plate (300) and the furnace body (100).

10. The horizontal heat recovery coke oven according to any one of claims 1 to 6, characterized in that: A lining (250) is provided on a side of the furnace door (200) facing the carbonization chamber (110).

Images