Arrangement system for large and medium-sized dry quenching waste heat utilization

Abstract

The utility model relates to an arrangement system for large and medium-sized dry quenching waste heat utilization, which is characterized in that a dry quenching furnace, a primary dust remover, a dry quenching waste heat boiler, a connecting flue, a secondary dust remover, a circulating fan and a water supply preheater are annularly arranged, the dry quenching waste heat boiler and a boiler water supply pump station system are arranged in a combined manner, the outlet of the dry quenching waste heat boiler is raised, and the outlet of the secondary dust remover is raised. A boiler water supply pump station system is arranged between the bottom of an outlet of the improved coke dry quenching waste heat boiler and the ground, a desalting water tank is arranged on the ground beside the boiler water supply pump station system, sampling equipment is arranged beside the outlet of the coke dry quenching waste heat boiler, and a deaerator is arranged beside the lower portion of the coke dry quenching waste heat boiler. The dry quenching waste heat boiler waste heat recycling system has the advantages that the occupied area of a boiler water supply pump station system and the building structure cost can be saved, the dry quenching waste heat boiler waste heat recycling structure is more compact, the occupied area is small, the building workload is saved, and the building cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to dry quenching waste heat utilization technical field especially relates to a kind of arrangement system for large and medium-sized dry quenching waste heat utilization. BACKGROUND

[0002] The purpose of dry quenching waste heat recovery system is mainly to recover energy and utilize, the method is through dry quenching waste heat boiler to absorb the heat of circulating gas to generate steam, to realize the recovery of red coke sensible heat by steam-driven steam turbine generator set power generation and heat supply.

[0003] Dry quenching waste heat boiler, boiler feed water pump station system and steam power station in dry quenching waste heat recovery system are mostly independent buildings, dry quenching waste heat boiler, boiler feed water pump station system and steam power station are sequentially arranged, each unit is connected through dry quenching area pipe gallery, and the land area is relatively large.

[0004] The boiler outlet of traditional dry quenching waste heat recovery system is connected with secondary dust collector through flue, the hearth height of dry quenching waste heat boiler increases with the increase of dry quenching device, but the flue outlet height of dry quenching waste heat boiler is always kept about 2.0m, the lower hearth inside dry quenching waste heat boiler is actually without any heating surface, and is a hollow structure, and the connecting flue is almost arranged close to the ground, so that vehicles cannot pass through, affecting maintenance. Meanwhile, since the connecting flue of dry quenching waste heat boiler outlet needs to climb a very large height upwards and then enter the secondary dust collector, a large amount of coke powder particles in inert circulating gas are deposited in the connecting flue, which increases system resistance for a long time, affects production, and if coke powder in the connecting flue needs to be removed, production needs to be stopped, since the connecting flue is arranged close to the ground, unloading valve cannot be arranged, and only manual cleaning can be carried out, which is large in manual work load and poor in cleaning efficiency. UTILIZATIONAL CONTENT

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a kind of arrangement system for large and medium-sized dry quenching waste heat utilization, without changing the conventional dry quenching waste heat boiler flue inlet elevation, by improving the flue outlet elevation of dry quenching waste heat boiler, dry quenching waste heat boiler and boiler feed water pump station system are combined and arranged, the land area is small, saves civil construction amount, reduces building cost, dry quenching waste heat utilization arrangement is compact, waste heat recovery utilization efficiency is high, the bottom elevation of connecting flue between dry quenching waste heat boiler and secondary dust collector is improved, unloading valve is installed in the lower part of connecting flue, reduces cleaning work load, improves cleaning efficiency, and mechanical maintenance equipment can walk at the bottom of dry quenching waste heat boiler, improves dry quenching waste heat recovery utilization efficiency.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The arrangement system for large and medium-sized dry quenching waste heat utilization includes a dry quenching furnace, a primary dust collector, a dry quenching waste heat boiler, a connecting flue, a secondary dust collector, a circulating fan, a feed water preheater, a boiler feed water pump station system, a desalted water tank, a sampling device, a deaerator and a dust discharging valve.

[0008] Further, the boiler feed water pump station system includes a boiler feed water pump, a deaerated feed water pump, an ammonia water dosing device, a deaerating agent dosing device, a phosphate dosing device, a sample water recovery device, a continuous blowdown expander and a periodic blowdown expander.

[0009] Further, the dry quenching waste heat boiler is provided with the dust discharging valve at the lower part of the connecting flue connected with the secondary dust collector.

[0010] Further, the sampling device is arranged on an auxiliary 4.4m platform, and the sampling water of the sampling device flows into the sample water recovery device by itself and is sent to the desalted water tank after recovery.

[0011] Further, the deaerator is arranged on an 8.8m building platform.

[0012] Compared with the prior art, the dry quenching waste heat boiler has the advantages that:

[0013] 1. By raising the flue outlet elevation of the dry quenching waste heat boiler, the equipment of the boiler feed water pump station system is arranged in the lower space of the dry quenching waste heat boiler, so that the land occupation and the construction structure cost of the boiler feed water pump station system are saved, the dry quenching waste heat boiler is more compact in structure, the land occupation area is small, the construction workload is saved, and the construction cost is reduced.

[0014] 2. The boiler feed water pump station system is arranged at the bottom of the dry quenching waste heat boiler, so that the connecting pipeline and the pipe gallery of the boiler feed water pump station system and the dry quenching waste heat boiler are saved, the boiler feed water pump station system and the dry quenching waste heat boiler are compact in structure, the boiler feed water pump station system is arranged on the ground, investment is saved, maintenance is convenient and fast, and the utilization rate of the dry quenching waste heat boiler is improved.

[0015] 3. The dry quenching waste heat boiler outlet elevation is raised, the connection amount of the dry quenching waste heat boiler and the secondary dust collector is saved, the connection height is reduced, the circulating fan operation resistance is reduced, the secondary dust collector processing efficiency is improved, the dust collector processing effect is improved, the production cost is saved, and the operation efficiency of the dry quenching waste heat boiler is improved.

[0016] 4. After the boiler flue outlet elevation is raised, the dry quenching waste heat boiler and the secondary dust collector are connected, the lower part of the flue gas pipeline is raised, and the vehicle can pass through, the maintenance is convenient, and the maintenance mechanization degree is improved.

[0017] 5. The dry quenching waste heat boiler and the secondary dust collector are connected, the connection flue is shortened after the dry quenching waste heat boiler outlet height is raised, the coke powder deposition phenomenon is reduced, the pipeline ash removal amount is reduced, the connection reliability of the dry quenching waste heat boiler and the secondary dust collector is improved, and the coke powder deposited in the lower part of the flue can be transported by using gas force or a scraper conveyor to a specified position, the ash removal work amount is reduced, the ash removal efficiency is improved, the maintenance machine can be arranged at the bottom of the dry quenching waste heat boiler, the maintenance distance is saved, the maintenance time is shortened, and the mechanical degree of dry quenching waste heat recovery is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a system layout of the layout system for dry quenching waste heat utilization of large and medium-sized coke.

[0019] Figure 2 It is a vertical section layout of the dry quenching waste heat boiler.

[0020] Figure 3 It is a ground equipment layout of the layout system for dry quenching waste heat utilization.

[0021] Figure 4 It is a 4.4m-elevation equipment layout of the sampling equipment.

[0022] Figure 5 It is an 8.8m-elevation equipment layout of the deaerator.

[0023] Figure 6 It is a vertical layout of the sampling equipment and the deaerator.

[0024] Figure 7 It is a vertical layout of the traditional dry quenching waste heat boiler.

[0025] In the diagram: 1. Dry quenching furnace; 2. Primary dust collector; 3. Dry quenching coke waste heat boiler; 4. Connecting flue; 5. Secondary dust collector; 6. Circulating fan; 7. Feedwater preheater; 8. Boiler feedwater pump; 9. Deaerator feedwater pump; 10. Ammonia dosing equipment; 11. Deoxygenant dosing equipment; 12. Phosphate dosing equipment; 13. Sample water recovery equipment; 14. Continuous blowdown expander; 15. Periodic blowdown expander; 16. Demineralized water tank; 17. Sampling equipment; 18. Deaerator; 19. Ash discharge valve; 20. Auxiliary 4.4m platform; 21. 8.8m building platform. Detailed Implementation

[0026] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings:

[0027] Example: Figure 7 As shown, taking a 200t / h dry quenching coke oven as an example, the conventional outlet elevation of the dry quenching waste heat boiler 3 is 1.8m. The interior of the lower furnace of the dry quenching waste heat boiler 3 actually has no heating surface. The bottom of the dry quenching waste heat boiler 3 has a hollow structure, and the connecting flue 4 between the dry quenching waste heat boiler 3 and the secondary dust collector 5 is arranged almost close to the ground.

[0028] like Figures 1-6 As shown, a layout system for utilizing waste heat from dry quenching coke ovens in large and medium-sized plants includes a dry quenching furnace 1, a primary dust collector 2, a dry quenching coke oven waste heat boiler 3, a connecting flue 4, a secondary dust collector 5, a circulating fan 6, a feedwater preheater 7, a boiler feedwater pumping station system, a demineralized water tank 16, a sampling device 17, a deaerator 18, and an ash discharge valve 19. The dry quenching furnace 1, primary dust collector 2, dry quenching coke oven waste heat boiler 3, connecting flue 4, secondary dust collector 5, circulating fan 6, and feedwater preheater 7 are arranged in a ring. Without changing the heating surface area inside the dry quenching coke oven waste heat boiler 3, the elevation of the flue outlet of the dry quenching coke oven waste heat boiler 3 is raised to 7m, with a flue outlet lifting height of 5.2m. The dry quenching coke oven waste heat boiler 3 is integrated with the boiler feedwater pumping station system. A boiler feedwater pump station system is installed on the ground at the bottom of the raised dry quenching waste heat boiler 3. The sampling device 17 is installed on the auxiliary span 4.4m platform 20 on the side of the flue outlet of the dry quenching waste heat boiler 3. Since the boiler feedwater pump station system is located at the bottom of the dry quenching waste heat boiler 3, only the auxiliary span 4.4m platform 20 is reserved for placing the sampling device 17. A demineralized water tank 16 is installed on the ground next to the boiler feedwater pump station system. The demineralized water tank 16 is located on the ground outside the boiler feedwater pump station system. A deaerator 18 is placed on the 8.8m building platform 21 on the lower side of the dry quenching waste heat boiler 3. This optimized layout scheme raises the flue outlet elevation of the dry quenching waste heat boiler 3 and utilizes the space under the dry quenching waste heat boiler 3 to arrange the equipment of the dry quenching waste heat boiler feedwater pump station system.

[0029] Further, the boiler feed water pump station system comprises a boiler feed water pump 8, a deaerating feed water pump 9, an ammonia water dosing device 10, a deaerating agent dosing device 11, a phosphate dosing device 12, a sample water recovery device 13, a continuous blowdown expander 14, and a periodic blowdown expander 15. The boiler feed water pump 8, the deaerating feed water pump 9, the ammonia water dosing device 10, the deaerating agent dosing device 11, the phosphate dosing device 12, the sample water recovery device 13, the continuous blowdown expander 14, and the periodic blowdown expander 15 are arranged on the ground at the bottom of the dry quenching waste heat boiler 3, and the connecting pipelines and pipe galleries are shortened and connected compactly.

[0030] Further, the improved dry quenching waste heat boiler 3 is connected with the secondary dust collector 5, and a dust discharge valve 19 is arranged at the lower part of the connecting flue 4. The height of the connecting flue 4 is increased, and the coke ash in the dust discharge valve 19 can be manually cleaned, or the seriously coked ash discharged from the dust discharge valve can be transported by arranging a pneumatic conveying device or a scraper conveyor, so that the ash cleaning mechanization is improved.

[0031] Further, the sampling device 17 is arranged on the auxiliary 4.4m platform 20, the sampling water of the sampling device 17 flows into the sample water recovery device 13 by self-flow, and after the sampling water is recovered, it is sent to the desalted water tank 16. The sampling device 17 is connected with the desalted water tank 16 through the sample water recovery device 13. The sample water recovery device 13 is arranged on the ground at the bottom of the dry quenching waste heat boiler 3, and the sampling device 17 is arranged on the auxiliary 4.4m platform 20. The sampling water flows into the sample water recovery device 13 by self-flow through the height difference between the sampling device 17 and the sample water recovery device 13, and after the sampling water is recovered, it is sent to the desalted water tank 16.

[0032] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited thereto. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A layout system for utilizing waste heat from dry quenching of coke ovens in large and medium-sized plants, comprising a dry quenching furnace, a primary dust collector, a dry quenching waste heat boiler, a connecting flue, a secondary dust collector, a circulating fan, a feedwater preheater, a boiler feedwater pumping station system, a demineralized water tank, sampling equipment, a deaerator, and an ash discharge valve, characterized in that, The dry quenching furnace, primary dust collector, dry quenching waste heat boiler, connecting flue, secondary dust collector, circulating fan, and feedwater preheater are arranged in a ring. The dry quenching waste heat boiler and the boiler feedwater pump station system are combined. The outlet of the dry quenching waste heat boiler is raised. The boiler feedwater pump station system is set between the bottom of the raised dry quenching waste heat boiler outlet and the ground. A demineralized water tank is set on the ground next to the boiler feedwater pump station system. A sampling device is set on the side of the outlet of the dry quenching waste heat boiler. A deaerator is set on the lower side of the dry quenching waste heat boiler.

2. The arrangement system for utilizing waste heat from dry quenching coke ovens according to claim 1, characterized in that, The boiler feedwater pump station system includes a boiler feedwater pump, a deaerator feedwater pump, ammonia dosing equipment, deaerator dosing equipment, phosphate dosing equipment, sample water recovery equipment, continuous blowdown expander, and periodic blowdown expander.

3. The arrangement system for utilizing waste heat from dry quenching coke ovens according to claim 1, characterized in that, An ash discharge valve is installed at the bottom of the connecting flue connecting the dry quenching waste heat boiler and the secondary dust collector.

4. The arrangement system for utilizing waste heat from dry quenching coke ovens according to claim 1, characterized in that, The sampling equipment is set on an auxiliary 4.4m platform. The sampled water from the sampling equipment flows by gravity into the sample water recovery equipment, and the recovered sample water is sent to the demineralized water tank.

5. The arrangement system for utilizing waste heat from dry quenching coke ovens according to claim 1, characterized in that, The deaerator is installed on an 8.8m building platform.

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