A coke oven production by-product recovery device

Abstract

The utility model discloses a coke oven production byproduct recovery device, including the furnace column, the top fixed mounting of furnace column has the gas collecting pipe, the inside fixed mounting of gas collecting pipe has the second spraying mechanism, the bottom fixed mounting of gas collecting pipe has the first aperture pipeline, the top fixed mounting of gas collecting pipe has the II type pipe, the one end fixed mounting of II type pipe away from gas collecting pipe has the air suction pipe. The utility model discloses through first spraying mechanism, second spraying mechanism and third spraying mechanism reasonable control and regulate the circulation ammonia water spray amount of doped tar, reach the setting temperature 78 90 DEG C of reducing raw coal gas export system even control at lower temperature, increase the recovery of tar, naphthalene, acidic gas etc. byproduct in raw coal gas, reduce the load of tar, naphthalene, acidic gas etc. in raw coal gas recovery in the operation process of recovery system primary cooler, prolong the maintenance time and service life of primary cooler etc. recovery equipment, save the cost, have the remarkable environmental protection, economic benefit.

Description

Technical Field

[0001] This utility model relates to the field of coke oven by-product recovery technology, specifically a coke oven production by-product recovery device. Background Technology

[0002] In coke oven production, circulating ammonia water spraying is one of the core processes of the raw coal gas extraction system. Its main function is to cool the high-temperature raw coal gas and promote the condensation and preliminary purification of chemical byproducts such as tar. The amount of circulating ammonia water used is a key operating parameter affecting the cooling and recovery effect. This amount is not fixed but is influenced by a complex set of factors, including the coke oven type, scale, production process, and the properties of the raw coal used. There are generally accepted design specifications and empirical values ​​in the industry. Typically, producing 1 ton of coke requires approximately 1.3 to 1.5 tons of dry coal. Based on this, for a single-tube coke oven, the standard circulating ammonia water spraying volume is approximately 6.5 to 7.5 cubic meters per ton of coke, which translates to an hourly flow rate of generally 1500 to 3000 m³ / h. 3 Between / h.

[0003] In actual production, increasing the circulating ammonia flow rate causes the tar-ammonia water to overflow because it cannot be discharged from the tar box in time. If the current circulating ammonia flow rate is maintained, the temperature of the raw coal gas (currently 120-150℃) cannot be reduced to the 80-90℃ required by the operating procedures. At the same time, it reduces the recovery of by-products such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide H2S) in the raw coal gas, resulting in the raw coal gas not being discharged in time, causing adverse phenomena such as smoke and increased blower load. The designed processing capacity of the raw coal gas is 5wm3 / h, while the actual processing volume is 6.5wm3 / h. Such production operation creates great resistance to the daily operation of the blower, and affects the processing capacity of the blower and the reduction of the raw coal gas temperature. Therefore, we propose a coke oven production by-product recovery device. Utility Model Content

[0004] The purpose of this invention is to provide a coke oven by-product recovery device to solve the problems mentioned in the background art. In actual production, if the circulating ammonia water flow rate increases, the tar-ammonia water cannot be discharged from the tar box in time, causing overflow. If the current circulating ammonia water flow rate is maintained, the temperature of the raw coal gas (currently 120-150℃) cannot be reduced to the 80-90℃ required by the operating procedures. This also reduces the recovery of by-products such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide H2S) in the raw coal gas, resulting in the raw coal gas not being discharged in time, causing smoke, increased blower load, and other adverse phenomena. The designed processing capacity of the raw coal gas is 5 Wm³ / h, while the actual processing volume is 6.5 Wm³ / h. This production operation creates significant resistance to the daily operation of the blower, affecting both the blower's processing capacity and the reduction of the raw coal gas temperature.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a coke oven by-product recovery device, comprising:

[0006] A furnace column is provided, with a gas collecting pipe fixedly installed above it. A second spraying mechanism is fixedly installed inside the gas collecting pipe. A first perforated pipe is fixedly installed at the bottom of the gas collecting pipe. A type II pipe is fixedly installed above the gas collecting pipe. A suction pipe is fixedly installed at the end of the type II pipe away from the gas collecting pipe. A second perforated pipe is fixedly installed at the bottom of the suction pipe. A mechanized clarification tank is provided at the bottom of the suction pipe. A tar box is fixedly installed on the left side of the suction pipe. A bridge pipe elbow is installed on the left side of the gas collecting pipe. An ascending pipe is installed below the bridge pipe elbow. A heat insulation plate is fixedly installed on the left side of the ascending pipe. A first spraying mechanism is fixedly installed at the bottom right side of the type II pipe. An ammonia water pipe is fixedly installed on the right side of the type II pipe. The input end of the ammonia water pipe is connected to the main ammonia water pipe. A manually adjustable flap is installed on the upper left side of the type II pipe. An automatically adjustable flap is installed on the upper right side of the type II pipe.

[0007] In a preferred embodiment of the coke oven production by-product recovery device of this utility model, the riser pipe is connected to the gas collecting pipe through the bridge pipe elbow, the gas collecting pipe is connected to the type II pipe, the type II pipe is connected to the suction pipe, and the type II pipe is connected to the ammonia water main pipe through the ammonia water pipe.

[0008] In a preferred embodiment of the coke oven production by-product recovery device of this utility model, the first perforated pipe is connected to the gas collecting pipe, and the gas suction pipe is connected to the second perforated pipe.

[0009] As a preferred embodiment of the coke oven production by-product recovery device of this utility model, the gas collecting pipe is further provided with:

[0010] The third spraying mechanism is fixedly installed inside the gas collection pipe.

[0011] As a preferred embodiment of the coke oven production by-product recovery device of this utility model, the suction pipe is further provided with:

[0012] The second spraying mechanism is fixedly installed inside the air intake pipe.

[0013] As a preferred embodiment of the coke oven production by-product recovery device of this utility model, the first spraying mechanism includes a spraying pipe, a flow control valve is fixedly installed at the input end of the spraying pipe, a nozzle is fixedly installed at the output end of the spraying pipe, and the spraying pipe passes through the inner wall of the type II pipe.

[0014] Compared with the prior art, this utility model provides a coke oven production by-product recovery device, which has the following beneficial effects:

[0015] 1. This utility model rationally regulates the amount of circulating ammonia water sprayed with tar by means of a first spraying mechanism, a second spraying mechanism, and a third spraying mechanism, thereby reducing the set temperature of the raw coal gas extraction system to 78-90℃ or even lower. This increases the recovery of by-products such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide HS) in the raw coal gas, reduces the load on the primary cooler of the recovery system during operation, extends the maintenance time and service life of the primary cooler and other recovery equipment, and saves costs, resulting in significant environmental and economic benefits. At the same time, the temperature and volume of the raw coal gas are reduced, lowering the pressure of the gas collecting pipe and allowing more raw coal gas to be extracted in a timely manner, reducing smoke from the machine side, coke side, and top of the coke oven, and achieving timely absorption and purification of the "smoking" raw coal gas generated by the oven. At the same time, it can recover more tar, naphthalene, acid gases (such as sulfur dioxide, hydrogen sulfide, etc.) and other chemical products from raw coal gas, which can improve the purification process of coal gas cooling, desulfurization, ammonium sulfate and benzene removal in the subsequent recovery system of raw coal gas. This greatly improves the production efficiency of coke ovens, and is conducive to the environmental protection of production and equipment operation. It also reduces the maintenance time of primary cooler, reduces the maintenance time of blower system, and extends the service life of equipment, which has significant environmental and economic benefits.

[0016] 2. This utility model, by rationally controlling the amount of circulating ammonia water sprayed with tar, prevents the long-term accumulation of byproducts such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide, HS) in the raw coal gas within the gas collecting pipe and suction pipe. This reduces the scaling of impurities such as naphthalene on the walls of the gas collecting pipe, suction pipe, and the internal pipes of the primary cooler in the recovery system, lowers the inlet temperature of the primary cooler, improves the raw coal gas processing capacity of the recovery system, and reduces the operating resistance of the primary cooler equipment. At the same time, it has a direct and significant effect on reducing the suction load at the front end of the blower in the recovery system and reducing the resistance of the blower. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the first spraying mechanism of this utility model.

[0019] In the diagram: 1. Type II pipe; 2. Automatic adjusting flap; 3. Ammonia water main pipe; 4. Suction pipe; 5. Tar box; 6. Gas collecting pipe; 7. Ascending pipe; 8. Furnace column; 9. Insulation plate; 10. Bridge pipe elbow; 11. Ammonia water pipe; 12. Manual adjusting flap; 13. First opening pipe; 14. First spraying mechanism; 141. Spraying pipe; 142. Sprayer head; 143. Flow control valve; 15. Mechanized clarification tank; 16. Second spraying mechanism; 17. Second opening pipe; 18. Third spraying mechanism. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 and Figure 2 A coke oven by-product recovery device includes a furnace column 8, a gas collecting pipe 6 fixedly installed above the furnace column 8, a second spraying mechanism 16 fixedly installed inside the gas collecting pipe 6, a first perforated pipe 13 fixedly installed at the bottom of the gas collecting pipe 6, a type II pipe 1 fixedly installed above the gas collecting pipe 6, a suction pipe 4 fixedly installed at the end of the type II pipe 1 away from the gas collecting pipe 6, a second perforated pipe 17 fixedly installed at the bottom of the suction pipe 4, a mechanized clarification tank 15 provided at the bottom of the suction pipe 4, a tar box 5 fixedly installed on the left side of the suction pipe 4, a bridge pipe elbow 10 installed on the left side of the gas collecting pipe 6, and a bridge pipe elbow 10 located below the bridge pipe elbow 10. An ascender pipe 7 is installed, and a heat insulation plate 9 is fixedly installed on the left side of the ascender pipe 7. A first spraying mechanism 14 is fixedly installed on the bottom right side of the interior of the type II pipe 1. An ammonia water pipe 11 is fixedly installed on the right side of the type II pipe 1. The input end of the ammonia water pipe 11 is connected to the ammonia water main pipe 3. A manual adjustment flap 12 is installed on the upper left side of the interior of the type II pipe 1. An automatic adjustment flap 2 is installed on the upper right side of the interior of the type II pipe 1. The ascender pipe 7 is connected to the gas collecting pipe 6 through the bridge pipe elbow 10. The gas collecting pipe 6 is connected to the type II pipe 1. The type II pipe 1 is connected to the suction pipe 4. The type II pipe 1 is connected to the ammonia water main pipe 3 through the ammonia water pipe 11.

[0022] In this implementation plan: This utility model rationally controls the amount of circulating ammonia water sprayed with tar by means of the first spraying mechanism 14, the second spraying mechanism 16, and the third spraying mechanism 18, thereby reducing the set temperature of the raw coal gas extraction system (78-90℃ or even lower), increasing the recovery of by-products such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide H2S) in the raw coal gas, reducing the load on the raw coal gas recovered by the primary cooler during the operation of the recovery system, extending the maintenance time and service life of the primary cooler and other recovery equipment, saving costs, and having significant environmental and economic benefits; at the same time, the temperature of the raw coal gas is reduced and the volume is reduced, the pressure of the gas collecting pipe 6 is reduced, and more raw coal gas is extracted in time, reducing the smoke from the machine side, coke side, and top of the coke oven, and realizing the timely absorption and purification of the "smoking" raw coal gas generated by the oven body. Simultaneously, it can recover more tar, naphthalene, acidic gases (such as sulfur dioxide, hydrogen sulfide H2S, etc.) and other chemical products from raw coal gas, which improves the purification process of subsequent raw coal gas recovery systems, including gas cooling, desulfurization, ammonium sulfate, and benzene removal. This significantly increases the production efficiency of coke ovens, benefits production and equipment operation, reduces the maintenance time of primary coolers and blower systems, and extends equipment lifespan, resulting in significant environmental and economic benefits. Furthermore, through reasonable regulation of blending... The amount of circulating ammonia sprayed with impurities is reduced to prevent byproducts such as tar, naphthalene, and acidic gases (such as sulfur dioxide and hydrogen sulfide H2S) from accumulating in the gas collecting pipe 6 and the suction pipe 4. This reduces scaling of impurities such as naphthalene on the walls of the gas collecting pipe 6, the suction pipe 4, and the internal pipes of the primary cooler in the recovery system, lowers the inlet temperature of the primary cooler, improves the processing capacity of the blast gas in the recovery system, and reduces the operating resistance of the primary cooler equipment. At the same time, it has a direct and significant effect on reducing the suction load at the front end of the blower in the recovery system and reducing the resistance of the blower.

[0023] Furthermore:

[0024] In an optional embodiment, the first perforated pipe 13 is connected to the gas collecting pipe 6, and the gas suction pipe 4 is connected to the second perforated pipe 17.

[0025] In this implementation scheme: by opening holes at the bottom of the gas collecting pipe 6 and the suction pipe 4 and connecting the first perforated pipe 13 and the second perforated pipe 17, the gas-liquid mixture is directly guided to the mechanized clarification tank 15. The core advantage of this approach is that it completely bypasses the traditional tar box 5 outlet path, fundamentally avoiding the risk of tar box 5 overflow caused by increasing the ammonia water spraying volume, thus allowing the spraying volume to be safely increased to the ideal range. At the same time, this design greatly shortens the outlet path of the gas-liquid separator, enabling timely and rapid separation and removal of the condensed tar and ammonia water mixture, effectively reducing the accumulation volume of liquid in the suction pipe 4, significantly reducing the pipeline system resistance and the blower's suction load, and laying a structural foundation for improving the raw coal gas treatment capacity and recovery efficiency.

[0026] Furthermore:

[0027] In an optional embodiment, the gas collecting pipe 6 is further provided with:

[0028] The third spraying mechanism 18 is fixedly installed inside the air collection pipe 6.

[0029] In this implementation plan: by fixing and installing a third spraying mechanism 18 inside the gas collecting pipe 6, the spraying volume is greatly increased and the absorption characteristics of tar are utilized to achieve more thorough and uniform cooling of the raw coal gas, so that its temperature drops rapidly to the ideal range of 78-90℃. This not only significantly reduces the volume of raw coal gas and directly reduces the suction load of the subsequent blower, but more importantly, it greatly promotes the condensation and absorption and recovery of by-products such as tar, naphthalene, and acidic gases at the front end of the outlet system, thereby reducing the processing pressure of subsequent primary coolers, electrostatic precipitators, and other equipment, and improving the efficiency and stability of the overall recovery system.

[0030] Furthermore:

[0031] In an optional embodiment, the inhalation tube 4 is further provided with:

[0032] The second spraying mechanism 16 is fixedly installed inside the air intake pipe 4.

[0033] In this implementation plan, the core advantage of setting up a second spraying mechanism 16 inside the intake pipe 4 is to perform "secondary purification" and "deep cooling" on the raw coal gas that has been initially cooled by the gas collecting pipe 6. By spraying circulating ammonia water mixed with tar, it can efficiently capture impurities such as tar droplets, naphthalene, and acidic gases that have not been completely condensed in the gas collecting pipe 6. This effectively prevents these substances from condensing and adhering to the pipe wall due to temperature drop during the long transport of the intake pipe 4, thereby avoiding a reduction in the pipe flow area and an increase in resistance. This not only ensures the smooth flow of the intake pipe 4 and further reduces the temperature and volume of the raw coal gas, but also directly reduces the airflow resistance and impurity load faced by the blower, providing a key guarantee for the safe, efficient, and low-load operation of the blower.

[0034] Furthermore:

[0035] In an optional embodiment, the first spraying mechanism 14 includes a spraying pipe 141, a flow control valve 143 is fixedly installed at the input end of the spraying pipe 141, a nozzle 142 is fixedly installed at the output end of the spraying pipe 141, and the spraying pipe 141 passes through the inner wall of the type II pipe 1.

[0036] In this implementation plan, the core advantage of precisely controlling the spraying volume through the flow control valve 143 is that it achieves a leap from "experience-based control" to "precise metering" in the operation of circulating ammonia water spraying. It can scientifically and dynamically stabilize the spraying flow rate within the optimal range based on the real-time generation and temperature of the raw coal gas. This ensures sufficient cooling of the raw coal gas and maximizes the recovery of by-products, while effectively avoiding operational risks such as overflow of the tar box 5 or liquid resistance in the pipeline caused by excessive spraying. It not only ensures the safe and stable operation of the system, but also achieves optimized allocation of ammonia water resources and precise control of consumption costs.

[0037] Working Principle: When using this coke oven by-product recovery device, raw coal gas enters the gas collecting pipe 6 from the coke oven carbonization chamber via the riser pipe 7 and the bridge pipe elbow 10. Inside the gas collecting pipe 6, it undergoes initial cooling by circulating ammonia water sprayed from the ammonia water pipe 11 and circulating ammonia water mixed with tar (2%-10%) sprayed by the third spraying mechanism 18. Subsequently, the raw coal gas enters the type II pipe 1, where it is sprayed with circulating ammonia water mixed with tar (2%-10%) through the spray pipe 141 and nozzle 142 on the newly added first spraying mechanism 14. The spray rate is controlled by the flow control valve 143 (increasing from 1100L / h to 1500-3000L / h), significantly reducing the raw coal gas temperature to 78-90℃, shrinking its volume, and promoting the condensation and absorption of by-products such as tar, naphthalene, and acidic gases. The cooled raw coal gas and gas-liquid mixture then enter the suction pipe 4 through the type II pipe 1. In the suction pipe 4, a second spraying mechanism 16 further sprays ammonia water containing tar to enhance the collection of by-products. Secondly, openings are made at the bottom of the gas collecting pipe 6 and the suction pipe 4, connecting the first opening pipe 13 and the second opening pipe 17, allowing the gas-liquid mixture to flow directly back to the mechanized clarification tank 15, preventing overflow from the tar box 5, timely separation and removal of the tar-ammonia water mixture, reducing liquid retention in the suction pipe 4, and lowering the blower's suction load. The ammonia water main pipe 3 supplies circulating ammonia water, and the flow rate of the raw coal gas is jointly controlled by the automatic adjustment flap 2 and the manual adjustment flap 12. The furnace column 8 and the heat insulation plate 9 serve as structural support and heat insulation components, ensuring stable equipment operation. This is the working principle of the coke oven production by-product recovery device.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coke oven by-product recovery device, characterized in that, include: A furnace column (8) is provided, with a gas collecting pipe (6) fixedly installed above it. A second spraying mechanism (16) is fixedly installed inside the gas collecting pipe (6). A first perforated pipe (13) is fixedly installed at the bottom of the gas collecting pipe (6). A type II pipe (1) is fixedly installed above the gas collecting pipe (6). A suction pipe (4) is fixedly installed at the end of the type II pipe (1) away from the gas collecting pipe (6). A second perforated pipe (17) is fixedly installed at the bottom of the suction pipe (4). A mechanized clarification tank (15) is provided at the bottom of the suction pipe (4). A tar box is fixedly installed on the left side of the suction pipe (4). 5) A bridge pipe elbow (10) is installed on the left side of the gas collecting pipe (6), and an ascending pipe (7) is installed below the bridge pipe elbow (10). A heat insulation plate (9) is fixedly installed on the left side of the ascending pipe (7). A first spraying mechanism (14) is fixedly installed on the bottom right side of the inside of the type II pipe (1). An ammonia water pipe (11) is fixedly installed on the right side of the type II pipe (1). The input end of the ammonia water pipe (11) is connected to the ammonia water main pipe (3). A manual adjustment flap (12) is installed on the upper left side of the inside of the type II pipe (1). An automatic adjustment flap (2) is installed on the upper right side of the inside of the type II pipe (1).

2. The coke oven production by-product recovery device according to claim 1, characterized in that, The riser pipe (7) is connected to the gas collecting pipe (6) through the bridge pipe elbow (10), the gas collecting pipe (6) is connected to the type II pipe (1), the type II pipe (1) is connected to the suction pipe (4), and the type II pipe (1) is connected to the ammonia water main pipe (3) through the ammonia water pipe (11).

3. The coke oven production by-product recovery device according to claim 1, characterized in that, The first perforated pipe (13) is connected to the gas collecting pipe (6), and the gas suction pipe (4) is connected to the second perforated pipe (17).

4. The coke oven production by-product recovery device according to claim 1, characterized in that, The gas collecting pipe (6) is also provided with: The third spraying mechanism (18) is fixedly installed inside the air collection pipe (6).

5. A coke oven by-product recovery device according to claim 1, characterized in that, The suction pipe (4) is also provided with: The second spraying mechanism (16) is fixedly installed inside the air intake pipe (4).

6. A coke oven by-product recovery device according to claim 1, characterized in that, The first spraying mechanism (14) includes a spraying pipe (141), a flow control valve (143) is fixedly installed at the input end of the spraying pipe (141), a nozzle (142) is fixedly installed at the output end of the spraying pipe (141), and the spraying pipe (141) passes through the inner wall of the type II pipe (1).

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