Coke oven gas adjusting device

Abstract

The utility model relates to the technical field of thermal equipment, in particular to a coke oven gas adjusting device. Comprising a reducing cross, a throttling pipe is connected to a first pipe opening of the reducing cross, a pipe plug is installed on a second pipe opening, a pipe cap is installed on a fourth pipe opening, a throttling ring is arranged on the inner wall of the throttling pipe, the outer ring face of the throttling ring is fixedly connected to the inner wall of the throttling pipe, and an inner cavity of the throttling ring is of an annular structure of a circular truncated cone. The rear end face of the throttling ring is a ring face perpendicular to the axis of the throttling pipe, a nozzle is installed at the rear end of the throttling pipe through internal threads, and a columnar wrench connector is arranged at the rear end of the nozzle. The coke oven gas adjusting device is simple in structure, convenient to use, small in airflow resistance loss, stable in working state and less in tar deposition, and can adapt to different production states of the coke oven by replacing nozzles of different specifications without disassembling the throttle pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal equipment, in particular to a coke oven gas regulating device. Background Art

[0002] Coke oven gas, also known as coke oven gas, is a high-calorific-value gas, also known as raw gas or rough gas, due to its high flammable content. It is a combustible gas produced by high-temperature carbonization of coking coal in a coke oven, producing coke and tar. It is a byproduct of the coking industry. Coke oven gas is a mixture, and its yield and composition vary depending on the quality of the coking coal and the coking process conditions. Combustible components include hydrogen, methane, carbon monoxide, and unsaturated hydrocarbons (C2+). Carbon dioxide, nitrogen, and oxygen are non-combustible. Coke oven heating equipment refers to the auxiliary equipment that supplies heating gas and air to the coke oven. Each coke oven consists of N carbonization chambers and N+1 combustion chambers. Coke oven gas or a mixed gas introduced from outside enters the basement gas main through a regulating butterfly valve in the coke oven bay. It then passes through a regulating cock, an orifice plate, and a switching cock to each combustion chamber. The regulating orifice plate is mounted on the orifice box. The inner diameter of the regulating orifice plate is smaller than the inner diameter of the pipeline. As the gas passes through the regulating orifice plate in the pipeline, a localized contraction forms at the regulating orifice plate, increasing the flow rate. After the gas passes through the regulating orifice plate, the velocity decreases. During use, the inner diameter of the regulating orifice plate varies depending on the different production states of the coke oven. The inner diameter of each regulating orifice plate is calculated and determined during the coke oven design, and the inner diameter of the regulating orifice plate is fixed for each production state. When switching between different production states, the orifice plate box must be opened and the regulating orifice plate manually replaced, which greatly increases the operator's labor intensity. Chinese Patent No. 2021213414053 discloses "A Gas Regulating Device for a Coke Oven Heating System," with the authorization publication number CN214781634U. This device is installed on the connecting pipeline between the combustion chamber and the gas main, and includes: a regulating cock, a regulating orifice valve, and an exchange cock arranged sequentially along the gas main toward the combustion chamber. The valve inlet of the regulating orifice valve connected to the regulating cock includes a large-diameter section at one end for communicating with the connecting pipeline and a small-diameter section connected to the other end of the large-diameter section. The area of ​​the large-diameter section is larger than that of the small-diameter section. The valve plate of the regulating orifice valve is used to adjust the blocked area of ​​the small-diameter section. The valve outlet of the regulating orifice valve connected to the exchange cock communicates with the small-diameter section, and the area of ​​the valve outlet is equal to that of the large-diameter section. This device uses an orifice valve with a gate structure to replace the orifice plate, achieving gas flow regulation and reducing labor intensity. However, the gas channel formed by the movable orifice valve is of irregular shape, and there are many right angles between the opening surface of the orifice valve and the blocking surface. The resistance of the gas suddenly increases when passing through the orifice valve, and suddenly decreases after passing through the orifice valve. There is a lack of a smooth transition section, and the airflow is prone to turbulence, resulting in excessive resistance loss and high energy consumption. In addition, there are many gaps in the orifice valve and the fit is not tight enough. Tar in the gas is deposited in the gaps, causing blockage of the gas channel and affecting the stability of the airflow. Utility Model Content

[0003] In order to solve the above problems of the prior art, the utility model provides a coke oven gas regulating device which has a simple structure, is easy to use, has low airflow resistance loss, is stable in working state and is easy to adjust in working state.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model describes a coke oven gas regulating device comprising a reducing four-way pipe, wherein the reducing four-way pipe has a first pipe opening and a second pipe opening coaxially arranged, and a third pipe opening and a fourth pipe opening coaxially arranged, the first pipe opening is connected to a throttling tube, the second pipe opening is installed with a pipe plug, the fourth pipe opening is installed with a pipe cap, a throttling ring is provided on the inner wall of the throttling tube, the throttling ring is an annular structure with an outer annular surface fixedly connected to the inner wall of the throttling tube and an inner cavity being a truncated cone, the rear end face of the throttling ring is an annular surface perpendicular to the axis of the throttling tube, the rear end of the throttling tube is provided with a nozzle via an internal thread, and the rear end of the nozzle is provided with a cylindrical wrench interface.

[0006] With the above-mentioned structural design, nozzles of different specifications can be replaced by opening the pipe plug. The structure is simple and easy to use, which helps to reduce the labor intensity of the operator. When the gas passes through the throttling tube, it is gradually compressed by the inner cavity of the throttling ring cone, and the airflow resistance gradually increases, which is conducive to the smooth passage of the airflow and reduces tar deposition.

[0007] Preferably, the nozzle is a tubular structure with an external thread on the outer wall, and a reducing ring is provided in the inner cavity of the nozzle. The reducing ring is an annular structure with an outer ring surface fixedly connected to the inner wall of the nozzle. Both ends of the reducing ring are bell-shaped with a larger outer side and a smaller inner side, and the front end face of the nozzle abuts against the rear end face of the throttling ring.

[0008] With the above structural design, when the gas passes through the nozzle, the pressure gradually increases and then decreases through the bell mouth, thereby avoiding sudden changes in airflow pressure, ensuring smooth airflow and reducing tar deposition.

[0009] Preferably, the cylindrical wrench interface is a hexagonal wrench interface.

[0010] With the above structural design, the nozzle can be easily replaced.

[0011] Preferably, the outer wall of the throttle tube is provided with an external thread, a compression nut is installed on the external thread, the rear end of the throttle tube is installed on the first pipe mouth through a thread and fixed with the compression nut, and a flexible joint is installed at the front end of the throttle tube.

[0012] With the above structural design, the throttle tube is firmly installed and not easy to loosen, and can be conveniently connected to the gas pipeline through a flexible joint.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] The coke oven gas regulating device has a simple structure and is easy to use. It can adapt to different production states of the coke oven by replacing nozzles of different specifications without disassembling the throttle tube. It has low air flow resistance loss, stable working state and less tar deposition. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a partial cross-sectional structure of an embodiment of the present utility model.

[0016] Figure 2 Schematic diagram of the rear end face structure of the nozzle. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] like Figure 1 As shown, the coke oven gas regulating device described in the present invention includes a reducing cross 1, which has a first pipe opening 2 and a second pipe opening 3 coaxially arranged, as well as a third pipe opening 4 and a fourth pipe opening 5 coaxially arranged, and the inner ends of the four pipe openings are interconnected; that is, the first pipe opening 2 and the second pipe opening 3 are located on the same axis, the third pipe opening 4 and the fourth pipe opening 5 are located on the same axis, and the axis of the first pipe opening 2 and the axis of the third pipe opening 4 are located in the same plane and form an 80-degree angle. A throttling tube 6 is connected to the first pipe opening 2, and a pipe plug 7 is installed on the second pipe opening 3 via an internal thread. The inner end of the pipe plug 7 is an external thread that adapts to the second pipe opening 3, and the outer end is a polyhedral plug, which is convenient for disassembling and assembling the pipe plug 7 using a wrench. A pipe cap 8 is installed on the fourth pipe opening 5 via an external thread. A throttling ring 61 is provided on the inner wall of the throttling tube 6. The throttling ring 61 is an annular structure with an outer ring surface fixedly connected to the inner wall of the throttling tube 6 and an inner cavity being a truncated cone. The throttling ring 61 and the throttling tube 6 are an integrated structure. Of course, the two can also be fixed together by split welding. The inner ring surface of the throttling ring 61 is in the shape of a trumpet with a large front end and a small rear end. After the coal gas enters the throttling tube 6 from the front end, it can smoothly transition along the inner wall of the throttling tube 6 to the inner wall of the trumpet of the throttling ring 61, and gradually shrink along the inner wall of the trumpet of the throttling ring 61. During this process, the resistance to the airflow gradually increases.

[0019] The rear end surface of the throttle ring 61 is an annular surface perpendicular to the axis of the throttle tube 6. The rear end of the throttle tube 6 is mounted with a nozzle 9 via an internal thread. The rear end of the nozzle 9 is provided with a cylindrical wrench interface 91. The cylindrical wrench interface 91 can be an internal hexagonal wrench interface or a square prism wrench interface. During disassembly or assembly, the nozzle 9 can be removed or assembled by inserting an internal hexagonal wrench or square prism wrench into the cylindrical wrench interface 91 and rotating the nozzle 9.

[0020] like Figure 1 、 Figure 2 As shown, the nozzle 9 is a tubular structure with an external thread on the outer wall, and a reducing ring 92 is provided in the inner cavity of the nozzle 9. The reducing ring 92 is an annular structure with an outer ring surface fixedly connected to the inner wall of the nozzle 9. The reducing ring 92 and the nozzle 9 are an integrated structure. Both ends of the reducing ring 92 are bell mouths with a large outer side and a small inner side, and the maximum diameter of the bell mouth at the front end of the reducing ring 92 is equal to the minimum diameter at the rear end of the throttle ring 61 and they are butted together, so that the inner cavity of the throttle ring 61 is butted against the bell mouth at the front end of the reducing ring 92. After the gas passes through the throttle ring 61, Entering the bell mouth at the front end of the reducing ring 92, the channel diameter gradually decreases, and the airflow pressure continues to increase. The airflow pressure reaches the maximum at the minimum diameter in the middle section of the reducing ring 92, and then the airflow enters the bell mouth at the rear end of the reducing ring 92. The airflow pressure gradually decreases. In this way, the airflow pressure increases from small to large and then from large to small in a gradual process. There is no sudden pressure change, and the airflow runs smoothly. After the nozzle 9 is installed in place, the front end face of the nozzle 9 rests on the rear end face of the throttle ring 61 to achieve close docking, minimize the gap at the connection as much as possible, and avoid tar deposition.

[0021] The outer wall of the throttle tube 6 is provided with an external thread, on which a compression nut 10 is installed. The rear end of the throttle tube 6 is installed on the first pipe mouth 2 through a thread and fixed with the compression nut 10. The front end of the throttle tube 6 is installed with a flexible joint 11.

[0022] During operation, the coke oven gas regulating device is installed between the main gas pipe and the combustion chamber inlet pipe. The main gas pipe is connected to the throttle tube 6 via a flexible joint 11, and the combustion chamber inlet pipe is connected to the third nozzle 4. Gas enters the reducing cross 1 through the throttle tube 6 and the nozzle 9, and is then delivered to the combustion chamber through the third nozzle 4 and the combustion chamber inlet pipe. To switch to another operating mode, when the machine is shut down, remove the pipe plug 7, insert a suitable wrench through the second nozzle 3, into the reducing cross 1, and into the cylindrical wrench port 91. Rotate the wrench to remove the nozzle 9, replace the nozzle 9 with a nozzle of the appropriate specification and model, and reinstall it at the rear end of the throttle tube 6. Then reinstall the pipe plug 7.

[0023] The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A coke oven gas regulating device, comprising a reducing cross (1), the reducing cross (1) having a first pipe opening (2) and a second pipe opening (3) arranged coaxially, and a third pipe opening (4) and a fourth pipe opening (5) arranged coaxially, the first pipe opening (2) being connected to a throttling tube (6), the second pipe opening (3) being installed with a pipe plug (7), and the fourth pipe opening (5) being installed with a pipe cap (8), characterized in that: A throttling ring (61) is provided on the inner wall of the throttling tube (6). The throttling ring (61) is an annular structure with an outer annular surface fixedly connected to the inner wall of the throttling tube (6) and an inner cavity being a truncated cone. The rear end surface of the throttling ring (61) is an annular surface perpendicular to the axis of the throttling tube (6). A nozzle (9) is installed at the rear end of the throttling tube (6) via an internal thread. The rear end of the nozzle (9) is provided with a columnar wrench interface (91).

2. The coke oven gas regulating device according to claim 1, characterized in that: The nozzle (9) is a tubular structure with an external thread on the outer wall. A reducing ring (92) is provided in the inner cavity of the nozzle (9). The reducing ring (92) is an annular structure with an outer ring surface fixedly connected to the inner wall of the nozzle (9). Both ends of the reducing ring (92) are bell mouths with a larger outer surface and a smaller inner surface. The front end face of the nozzle (9) abuts against the rear end face of the throttling ring (61).

3. A coke oven gas regulating device according to claim 1 or 2, characterized in that: The cylindrical wrench interface (91) is a hexagonal wrench interface.

4. A coke oven gas regulating device according to claim 1 or 2, characterized in that: The outer wall of the throttling tube (6) is provided with an external thread, and a compression nut (10) is installed on the external thread. The rear end of the throttling tube (6) is installed on the first pipe opening (2) through a thread and fixed with the compression nut (10). The front end of the throttling tube (6) is installed with a flexible joint (11).

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