Dry quenching low-carbon emission reduction device

Abstract

The utility model discloses a dry quenching low-carbon emission reduction device, comprising: a dry quenching furnace, which comprises a furnace body and a cover body, and the cover body is used for sealing a furnace mouth of the furnace body; the coil pipe is arranged around the peripheral wall of the furnace mouth; the branch pipes are arranged in parallel, one end of each branch pipe communicates with the coil pipe, and the other end of each branch pipe communicates with the interior of the furnace body; one end of the main pipe is communicated with the coil pipe; the at least one gas source is communicated with the other end of the main pipe and used for providing gas for the furnace mouth before the cover body is separated from the furnace body, and the gas is used for isolating air so as to prevent the air from entering the furnace body when the cover body is opened. The device is simple in structure, the coil pipe and the branch pipe are arranged at the furnace opening of the dry quenching furnace, gas is conveyed to the furnace opening and the surrounding space during the cover opening period of the dry quenching furnace, air entering during the cover opening period is effectively controlled, and oxygen in the air is prevented from reacting with red coke.

Description

Technical Field

[0001] This application relates to the technical field of low-carbon metallurgy, and particularly to a dry coke quenching low-carbon emission reduction device. Background Art

[0002] At present, dry coke quenching is relative to wet coke quenching, which refers to a coke quenching method that uses inert gas to cool hot coke. The flue gas discharged from dry coke quenching equipment mainly includes charging coke flue gas, post-fan discharge flue gas, and coke discharging flue gas.

[0003] Due to structural reasons, in existing dry coke quenching equipment, some air will be sucked into the dry coke quenching furnace during the opening of the lid of the dry coke quenching furnace. The oxygen contained in the air burns with the red-hot coke, which will not only generate a large amount of carbon monoxide and carbon dioxide, but also cause coke burn-off. Utility Model Content

[0004] Aiming at the above problems, the purpose of the embodiment of this application is to provide a dry coke quenching low-carbon emission reduction device, which is used to solve the problems that carbon monoxide in the coke discharging flue gas cannot meet the requirements and the coke burn-off is too high.

[0005] The purpose of the embodiment of this application is to provide a dry coke quenching low-carbon emission reduction device, including:

[0006] A dry coke quenching furnace, which includes a furnace body and a cover body, and the cover body is used to seal the furnace mouth of the furnace body;

[0007] Coiled pipes, which are arranged around the outer peripheral wall of the furnace mouth;

[0008] A plurality of branch pipes, which are arranged in parallel and one end of each branch pipe is respectively communicated with the coiled pipes, and the other end of each branch pipe is respectively communicated with the inside of the furnace body;

[0009] A main pipe, one end of which is communicated with the coiled pipes;

[0010] At least one gas source, which is communicated with the other end of the main pipe and is used to provide gas to the furnace mouth before the cover body is separated from the furnace body, and the gas is used to isolate air and prevent air from entering the furnace body during the opening of the cover body;

[0011] A first valve, which is arranged on the main pipe and / or the branch pipes and is used to cut off or conduct the flow of the gas in the main pipe and / or the branch pipes.

[0012] As an optional embodiment, the dry coke quenching low-carbon emission reduction device further includes:

[0013] A control component, which is respectively connected to the first valve and the cover body, and receives the opening and closing signal of the cover body. Before a first preset time when the control component receives the opening signal of the cover body, it controls the first valve to open, and after a second preset time when it receives the closing signal of the cover body, it controls the first valve to close.

[0014] As an optional embodiment, the coke dry quenching low-carbon emission reduction device further includes:

[0015] A coke pot, which is used for storing materials;

[0016] A hoist, which is arranged on one side of the coke dry quenching furnace and is used to lift the coke pot to the furnace mouth of the furnace body so that the coke pot supplies materials to the furnace body;

[0017] A control component, which is respectively connected to the first valve and the coke pot, and receives the position signal of the coke pot. When the control component receives the first position signal of the coke pot, it controls the first valve to open, and when it receives the second position signal of the coke pot, it controls the first valve to close. The positions of the coke pot corresponding to the first position signal and the second position signal are different.

[0018] As an optional embodiment, a second valve is further provided on the pipeline between the gas source and the main pipe, and the second valve is used to adjust the pressure of the gas output by the gas source.

[0019] As an optional embodiment, the main pipe includes a first air outlet end and a second air outlet end. The first air outlet end and the second air outlet end are respectively connected to an inlet pipe, and the inlet pipes are symmetrically arranged on the outer peripheral wall of the coil pipe. The first air outlet end, the second air outlet end, the inlet pipe and the coil pipe are communicated with each other.

[0020] As an optional embodiment, the coil pipe, the branch pipe and the main pipe are all made of pressure-resistant seamless steel pipes.

[0021] As an optional embodiment, 24 branch pipes are provided and are distributed in a circular ring shape with the axis of the furnace body as the center.

[0022] The beneficial effects of the embodiments of the present application are as follows:

[0023] The structure of the present application is simple. By arranging a coil pipe and branch pipes at the furnace mouth of the coke dry quenching, gas is transported to the furnace mouth and its surrounding space during the period when the coke dry quenching furnace cover is opened, effectively controlling the entry of air during the opening of the cover, preventing the reaction of oxygen in the air with the red coke, thereby reducing the generation of carbon monoxide and carbon dioxide, and reducing the coke burn loss, achieving the effect of low-carbon emission of the coke dry quenching furnace. Description of the Drawings

[0024] Figure 1 Structural schematic of the embodiment of the present application Figure 1 ;

[0025] Figure 2 Structural schematic of the embodiment of the present application Figure 2 ;

[0026] Figure 3 Line graph showing the relationship between the difference in air intake and the difference in carbon monoxide in the embodiment of the present application;

[0027] Figure 4 Line graph showing the relationship between the difference in air intake and the burn-off rate in the embodiment of the present application;

[0028] Figure 5 Line graph showing the relationship between the difference in air intake and the difference in evaporation amount in the embodiment of the present application.

[0029] Reference numerals:

[0030] 1, dry quenching furnace; 11, furnace body; 12, cover body; 2, coiled pipe; 3, branch pipe; 4, main pipe; 41, first air outlet end; 42, second air outlet end; 43, intake pipe; 5, gas source; 6, first valve; 7, coke pot; 8, elevator; 9, infrared sensor. Detailed implementation manners

[0031] Various solutions and features of the present application are described herein with reference to the accompanying drawings.

[0032] It should be understood that various modifications can be made to the embodiments applied herein. Therefore, the above description should not be regarded as a limitation, but only as an example of the embodiments. Those skilled in the art will think of other modifications within the scope and spirit of the present application.

[0033] The accompanying drawings included in and constituting a part of this specification illustrate the embodiments of the present application, and together with the general description of the present application given above and the detailed description of the embodiments given below, are used to explain the principles of the present application.

[0034] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given as non-limiting examples with reference to the accompanying drawings.

[0035] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application.

[0036] When combined with the accompanying drawings, the above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0037] Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings; however, it should be understood that the claimed embodiments are merely examples of the present application and can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but are merely used as a basis for the claims and a representative basis for teaching those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0038] This specification may use the phrase "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", each of which may refer to one or more of the same or different embodiments according to the present application.

[0039] An embodiment of the present application provides a coke dry quenching low-carbon emission reduction device, as Figure 1 and Figure 2 shown, the coke dry quenching low-carbon emission reduction device includes a coke dry quenching furnace 1, a coiled pipe 2, a branch pipe 3, a main pipe 4, a gas source 5, and a first valve 6. Among them, the coiled pipe 2, the branch pipe 3, and the main pipe 4 are all made of pressure-resistant seamless steel pipes, enhancing the durability and reliability of the equipment.

[0040] The coke dry quenching furnace 1 includes a furnace body 11 and a cover body 12, and the cover body 12 is used to close the furnace mouth of the furnace body 11. The furnace body 11 is sequentially divided into a pre-storage chamber and a cooling chamber along the direction from the furnace mouth to the furnace bottom.

[0041] The coiled pipe 2 is arranged around the outer peripheral wall of the furnace mouth, and the distance between the coiled pipe 2 and the cover body 12 is at least 20 cm, and the diameter of the coiled pipe 2 is 20 cm, which neither affects the opening of the cover of the coke dry quenching furnace 1 nor ensures a sufficient distance to supply gas to the furnace mouth and its surrounding space.

[0042] A plurality of the branch pipes 3 are arranged in parallel, and one end of each branch pipe 3 is respectively communicated with the coiled pipe 2, and the other end of each branch pipe 3 is respectively communicated with the inside of the furnace body 11. Among them, 24 branch pipes 3 are provided, the diameter of the branch pipe 3 is 5 cm, and the plurality of branch pipes 3 are distributed in a circular ring with the axis of the furnace body 11 as the center, optimizing the structural layout and helping to improve the efficiency of gas flow.

[0043] One end of the main pipe 4 is communicated with the coiled pipe 2, and at least one gas source 5 is communicated with the other end of the main pipe 4, for supplying gas to the furnace mouth before the cover body 12 is separated from the furnace body 11, and the gas is used to isolate air, preventing air from entering the furnace body 11 through the furnace mouth during the opening of the cover body 12, creating an oxygen-deficient environment at the furnace mouth, reducing carbon emissions during the combustion process, and helping to achieve low-carbon production.

[0044] Among them, the gas is nitrogen or an oxygen-deficient gas, such as nitrogen from air separation, flue gas from a coke oven, etc., and it is required that the total content of oxygen and nitrogen dioxide is less than 5%.

[0045] The gas source 5 is required to have a pressure of 0.4 mpa to 0.6 mpa and a maximum exhaust volume of 5000 m 3 / h. When the pressure of the gas source 5 is insufficient, nitrogen needs to be supplemented. The jet time of the gas source 5 is 5 min, and the nitrogen injection volume is 87 m 3 .

[0046] The first valve 6 is provided on the main pipe 4 and / or the branch pipe 3 to cut off or conduct the flow of the gas in the main pipe 4 and / or the branch pipe 3. Among them, the first valve 6 can be a pneumatic valve.

[0047] Specifically, when a pneumatic valve is provided on the main pipe 4, the flow of the gas in the main pipe 4 is cut off or conducted through the pneumatic valve. After the pneumatic valve is opened, the gas can flow from the gas source 5 through the main pipe 4, then to the coil 2, and then from the coil 2 to the branch pipe 3, and finally into the coke dry quenching furnace 1.

[0048] When a pneumatic valve is provided on the branch pipe 3, the flow of the gas in the branch pipe 3 is cut off or conducted through the pneumatic valve. After the pneumatic valve is opened, the gas flows through the main pipe 4 and the coil 2 to the branch pipe 3, and finally into the coke dry quenching furnace 1.

[0049] When pneumatic valves are respectively provided on the main pipe 4 and the branch pipe 3, the flow of the gas in the main pipe 4 and the branch pipe 3 is cut off or conducted through the pneumatic valves. After both pneumatic valves are opened, the gas can enter the coil 2 from the main pipe 4, then enter the branch pipe 3 from the coil 2, and finally enter the coke dry quenching furnace 1 through the branch pipe 3.

[0050] As an optional embodiment, the coke dry quenching low-carbon emission reduction device further includes a control component, the control component is respectively connected to the first valve 6 and the cover body 12, and receives the opening and closing signals of the cover body 12. Before the first preset time when the control component receives the opening signal of the cover body 12, it controls the first valve 6 to open, and after the second preset time when it receives the closing signal of the cover body 12, it controls the first valve 6 to close. The first preset time and the second preset time are different times.

[0051] Specifically, the control component can determine the opening time of the cover body 12 based on the equipment working time preset by the operator, and then control the first valve 6 to open between 30 s and 60 s before the cover body 12 is opened to convey gas to the furnace mouth and its surrounding space. And, the closing time of the first valve 6 is after the cover body 12 is closed.

[0052] In the present application, through the interlocking connection between the first valve 6 and the cover body 12, it is ensured that the first valve 6 has been opened before the cover body 12 is separated from the furnace body 11, preventing the coke from being burned and excessive carbon monoxide and carbon dioxide from being generated after air enters the furnace opening.

[0053] As an alternative embodiment, the coke dry quenching low-carbon emission reduction device further includes a coke pot 7, a hoist 8, and a control component. The coke pot 7 is used for storing materials (coke), the hoist 8 is arranged on one side of the dry quenching furnace 1, and the hoist 8 is used to lift the coke pot 7 to the furnace opening of the furnace body 11 so that the coke pot 7 supplies materials into the furnace body 11.

[0054] The control component is respectively connected to the first valve 6 and the coke pot 7, and receives the position signal of the coke pot 7. When the control component receives the first position signal of the coke pot 7, it controls the first valve 6 to open, and when it receives the second position signal of the coke pot 7, it controls the first valve 6 to close. The positions of the coke pot 7 corresponding to the first position signal and the second position signal are different.

[0055] Specifically, after the coke pot 7 stores the materials to be processed, the hoist 8 lifts the coke pot 7 to the furnace opening position of the dry quenching furnace 1. If the speed of the hoist 8 is a preset fixed value, then the control component can determine the lifting position of the coke pot 7 according to the lifting time of the coke pot 7, thereby controlling the opening and closing of the first valve 6 to ensure the accuracy of gas flow and cut-off operations.

[0056] Alternatively, an infrared sensor 9 is provided on the frame of the hoist 8. When the hoist 8 lifts the coke pot 7 to a preset position, the infrared sensor 9 senses the coke pot 7 and emits an induction signal to the control component so that the control component controls the first valve 6 to open.

[0057] The present application precisely controls the opening and closing of the first valve 6 to ensure the synchronization of gas supply and material supply. Through the interlocking mechanism, it is ensured that the first valve 6 has been opened before the furnace body 11 is opened, preventing the coke from being burned and excessive carbon monoxide and carbon dioxide from being generated after air enters the furnace opening.

[0058] As an alternative embodiment, a second valve (not shown in the figure) is further provided on the pipeline between the gas source 5 and the main pipe 4, and the second valve is used to adjust the pressure of the gas output by the gas source 5. Among them, the second valve can be a pressure reducing valve.

[0059] Specifically, during the air intake process, the setting of the second valve allows the gas pressure to be adjusted, making the process more adaptable and meeting different production requirements.

[0060] As an optional embodiment, the main pipe 4 includes a first air outlet end 41 and a second air outlet end 42. The first air outlet end 41 and the second air outlet end 42 are respectively connected to an intake pipe 43. The intake pipes 43 are symmetrically arranged on the outer peripheral wall of the coil pipe 2. The first air outlet end 41, the second air outlet end 42, the intake pipe 43 and the coil pipe 2 are in communication with each other.

[0061] The main pipe 4 is connected to the intake pipe 43 through the first air outlet end 41 and the second air outlet end 42. The intake pipes 43 are symmetrically arranged on the outer peripheral wall of the coil pipe 2 to realize the uniform distribution of gas in the furnace body 11. The first air outlet end 41, the second air outlet end 42, the intake pipe 43 and the coil pipe 2 can be connected by welding.

[0062] When this application is in use, ensure that all components of the coke dry quenching low-carbon emission reduction device are correctly installed and in a standby working state.

[0063] When it is determined that the cover body 12 is about to be opened, according to the process requirements, open the second valve to adjust the air pressure of the nitrogen gas output by the gas source 5, and then open the first valve 6, so that the nitrogen gas meeting the pressure requirements sequentially passes through the main pipe 4, the intake pipe 43, the coil pipe 2 and the branch pipe 3 and enters the furnace mouth of the coke dry quenching furnace 1, so that the furnace mouth and the surrounding space are in an oxygen-deficient environment, preventing oxygen in the air from reacting with the red coke after the air enters the coke dry quenching furnace 1 during the opening of the cover, thereby reducing the generation of carbon monoxide and carbon dioxide, and reducing the coke burn loss, achieving the effect of low-carbon emission of the coke dry quenching furnace. Finally, when the cover body 12 is closed, close the first valve 6 and the second valve.

[0064] Exemplarily, as shown in Table 1 and Table 2, the experimental situation of supplementing nitrogen gas to the furnace mouth during the opening of the coke dry quenching furnace 1 is as follows:

[0065] Analyze the factors affecting carbon monoxide in the coke dry quenching furnace 1. Combining with the stable operation of the coke oven production, start the nitrogen filling test. Open the first valve 6 30 seconds before opening the cover for nitrogen filling, with an average hourly increase in nitrogen gas flow rate of 400 m 3 / h. In four groups of experiments over four days, the flow rate increased to more than 1600 m 3 / h, continuously maintain and record the data, and observe the changes of each index.

[0066]

[0067] Table 1

[0068]

[0069] Table 2

[0070] Before nitrogen filling, the average coke burn-off rate was 1.23%, the average carbon monoxide content in the dry quenching coke circulating gas was 4.2%, the temperature in the pre-storage chamber was 962.2 °C, the number of furnaces discharged per day was 122, and the power generation was 571,000 kw.

[0071] The nitrogen filling volume was 400 m 3 / h, the average coke burn-off rate was 1.09%, the average carbon monoxide content in the dry quenching coke circulating gas was 3.11%, the temperature in the pre-storage chamber was 973.2 °C, the number of furnaces discharged per day was 122, and the power generation was 565,000 kw.

[0072] The nitrogen filling volume was 800 m 3 / h, the average coke burn-off rate was 0.98%, the average carbon monoxide content in the dry quenching coke circulating gas was 4.62%, the temperature in the pre-storage chamber was 973.2 °C, the number of furnaces discharged per day was 122, and the power generation was 598,000 kw.

[0073] The nitrogen filling volume was 1200 m 3 / h, the average coke burn-off rate was 0.975%, the average carbon monoxide content in the dry quenching coke circulating gas was 4.34%, the temperature in the pre-storage chamber was 972.3 °C, the number of furnaces discharged per day was 122, and the power generation was 580,500 kw.

[0074] The nitrogen filling volume was 1600 m 3 / h, the average coke burn-off rate was 0.93%, the average carbon monoxide content in the dry quenching coke circulating gas was 4.54%, the temperature in the pre-storage chamber was 969.5 °C, the number of furnaces discharged per day was 122, and the power generation was 576,500 kw.

[0075] As Figures 3 - 5 shown, carbon monoxide shows an obvious decreasing trend with the increase of the nitrogen input volume (the decrease of the air inlet volume), and moreover, the burn-off rate and evaporation volume decrease after reducing the air inlet volume. Therefore, the device of the present application can effectively reduce the concentrations of carbon monoxide and carbon dioxide generated in the dry quenching furnace 1, and reduce the burn-off rate of the red coke; and moreover, there is a slight improvement in the particle size and hot state of the coke, so as to improve the quality of the coke, increase the coke output, and contribute to improving the efficiency of the coking plant.

[0076] The above embodiments are only exemplary embodiments of the present application and are not used to limit the present application. The protection scope of the present application is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present application, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present application.

Claims

1. A low-carbon emission reduction device for dry coke quenching, characterized in that: include: A dry quenching furnace, comprising a furnace body and a cover body, wherein the cover body is used to close a furnace opening of the furnace body; A coil, which is arranged around the outer peripheral wall of the furnace opening; A plurality of branch pipes are arranged in parallel and one end of each branch pipe is respectively connected to the coil pipe, and the other end of each branch pipe is respectively connected to the interior of the furnace body; A main pipe, one end of which is connected to the coil; at least one gas source, which is connected to the other end of the main pipe and is used to provide gas to the furnace opening before the cover is separated from the furnace body, and the gas is used to isolate air and prevent air from entering the furnace body during the opening of the cover; The first valve is arranged on the main pipe and / or the branch pipe, and is used to cut off or open the flow of the gas in the main pipe and / or the branch pipe.

2. A low-carbon emission reduction device for dry coke quenching as claimed in claim 1, characterized in that: The dry coke quenching low-carbon emission reduction device also includes: A control component is respectively connected to the first valve and the cover body, and receives an opening and closing signal of the cover body. The control component controls the first valve to open before a first preset time of receiving the opening signal of the cover body, and controls the first valve to close after a second preset time of receiving the closing signal of the cover body.

3. A low-carbon emission reduction device for dry coke quenching as claimed in claim 1, characterized in that: The dry coke quenching low-carbon emission reduction device also includes: Coke tank, which is used to store materials; An elevator, which is arranged at one side of the dry quenching furnace and is used to lift the coke tank to the furnace mouth of the furnace body so that the coke tank can feed into the furnace body; A control component is respectively connected to the first valve and the coke tank and receives a position signal of the coke tank. When the control component receives a first position signal of the coke tank, the control component controls the first valve to open, and when the control component receives a second position signal of the coke tank, the control component controls the first valve to close. The position of the coke tank corresponding to the first position signal is different from the position of the coke tank corresponding to the second position signal.

4. A low-carbon emission reduction device for dry coke quenching as claimed in claim 1, characterized in that: A second valve is also provided on the pipeline between the gas source and the main pipe, and the second valve is used to adjust the pressure of the gas output by the gas source.

5. The low-carbon emission reduction device for dry coke quenching according to claim 1, characterized in that: The main pipe includes a first air outlet end and a second air outlet end, the first air outlet end and the second air outlet end are respectively connected to an air inlet pipe, the air inlet pipe is symmetrically arranged on the outer peripheral wall of the coil, and the first air outlet end, the second air outlet end, the air inlet pipe and the coil are connected to each other.

6. A low-carbon emission reduction device for dry coke quenching as claimed in claim 1, characterized in that: The coil pipe, the branch pipe and the main pipe are all made of pressure-resistant seamless steel pipes.

7. A low-carbon emission reduction device for dry coke quenching as claimed in claim 1, characterized in that: The branch pipes are provided with 24 pieces and are distributed in a circular shape with the axis of the furnace body as the axis center.

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