CN-224230730-U - Rising pipe waste heat utilization device

CN224230730UCN 224230730 UCN224230730 UCN 224230730UCN-224230730-U

Abstract

The utility model relates to a rising pipe waste heat utilization device which comprises a heated section, a heat release section, a waste heat leading-out pipeline and a working medium leading-in pipeline, wherein the heated section consists of a lower collecting pipe, a heat exchange vertical pipe and an upper collecting pipe, a plurality of heat exchange vertical pipes are circumferentially embedded in the wall of the rising pipe, fins are arranged on one side of each heat exchange vertical pipe, the heat release section is arranged in a gas pipeline entering a furnace and consists of a plurality of annular fin pipes, one end of each annular fin pipe is connected with the upper collecting pipe through the waste heat leading-out pipeline, the other end of each annular fin pipe is connected with the lower collecting pipe through the working medium leading-in pipeline, and a working medium inlet is arranged on the waste heat leading-out pipeline close to the heat release section. The utility model adopts the circulating working medium to recycle the waste heat of raw gas in the riser, is used for heating the gas before entering the coke oven, can effectively reduce the heating gas consumption of the coke oven and improve the heat efficiency, has simple structure and safe use, adopts molten salt as the working medium, is provided with an ultrasonic descaling device, and is not easy to scale on the inner wall of the riser.

Inventors

DUAN MENGLIN
XIAO CHANGZHI

Assignees

中冶焦耐(大连)工程技术有限公司

Dates

Publication Date: 20260512
Application Date: 20250530

Claims (7)

1. A rising pipe waste heat utilization device is characterized by comprising a heated section, a heat release section, a waste heat leading-out pipeline and a working medium leading-in pipeline, wherein the heated section consists of a lower collecting pipe, a heat exchange riser and an upper collecting pipe, the lower collecting pipe and the upper collecting pipe are annular pipes, the lower collecting pipe is arranged on the bottom periphery of the rising pipe, the upper collecting pipe is arranged on the top periphery of the rising pipe, a plurality of heat exchange risers are circumferentially embedded in the wall of the rising pipe, fins are arranged on one side, facing the inside of the rising pipe, of the heat exchange risers, the lower ends of the heat exchange riser are communicated with the lower collecting pipe, the upper ends of the heat exchange risers are communicated with the upper collecting pipe, the heat release section is arranged in a furnace gas inlet pipeline and consists of a plurality of annular fin pipes, two ends of the annular fin pipes extend out of the furnace gas inlet pipeline, one ends of the annular fin pipes are connected with the upper collecting pipe through the waste heat leading-out pipeline, the other ends of the annular fin pipes are connected with the lower collecting pipe through the working medium pipeline, a working medium inlet is arranged on the waste heat leading-out pipeline close to the heat release section, and a valve is arranged at the working medium inlet.
2. The rising pipe waste heat utilization device according to claim 1, wherein the rising pipe comprises a cylinder body, flanges and heat insulation layers, the flanges are respectively arranged at two ends of the cylinder body, the heat insulation layers are arranged on the outer sides of the cylinder body, the heat exchange vertical pipes are wrapped in the heat exchange vertical pipes, a plurality of slits are formed in the cylinder body along the circumferential direction, the heat exchange vertical pipes are embedded in the slits and welded with the cylinder body, and the inner wall of the cylinder body is a smooth wall surface.
3. The riser waste heat utilization device according to claim 1, wherein the waste heat guiding pipeline is provided with an outlet valve near the upper collecting pipe, and the working medium guiding pipeline is provided with an inlet valve near the lower collecting pipe.
4. The riser waste heat utilization device of claim 1, wherein the plurality of fins are radially disposed.
5. The riser waste heat utilization device according to claim 1, wherein the heated section, the heat release section, the waste heat lead-out pipeline and the working medium lead-in pipeline are made of stainless steel, and the heated section is made of heat-resistant stainless steel.
6. The riser waste heat utilization device of claim 1, wherein each heat exchange riser is made of a single piece of seamless steel tubing.
7. The riser waste heat utilization device according to claim 1, further comprising an ultrasonic descaling device, wherein the ultrasonic descaling device comprises an ultrasonic generator, an ultrasonic transducer and a high-frequency cable, the ultrasonic generator is connected with the ultrasonic transducer through the high-frequency cable, the ultrasonic transducer is arranged on a waveguide structure, and the waveguide structure is arranged on a flange at the top of the riser.

Description

Rising pipe waste heat utilization device Technical Field The utility model relates to the technical field of coke oven coking, in particular to a waste heat utilization device for a coke oven riser. Background The heat loss in the coking process of the coke oven mainly comprises 4 parts of furnace outlet red Jiao Xianre, raw gas sensible heat, coke oven flue gas sensible heat, furnace body surface heat dissipation and the like. The temperature of the coke oven raw gas is about 650-750 ℃, the sensible heat of the coke oven raw gas accounts for about 36% of the heat distribution of the coke oven, and the technology for recovering the waste heat of the coke oven raw gas is mature and has obvious economic benefit at present. The method of utilizing heat conducting oil, water or organic working medium to absorb heat of raw gas is called a riser waste heat utilization technology. In the practical application process of the coke oven riser waste heat utilization technology, attention needs to be paid to effective measures and reasonable structures of the riser heat exchanger, deformation and leakage are avoided, working substances are avoided from entering a coke oven carbonization chamber even when the problems occur, and safety and stability of coke oven production are ensured. Meanwhile, the temperature of the inner wall of the rising pipe (usually more than or equal to 450 ℃) needs to be reasonably and effectively controlled, and a large amount of tar condensation temperature area is avoided, so that the phenomenon of tar and graphitization on the inner wall of the rising pipe is avoided, and the rising pipe is blocked and the environmental protection problem (such as smoke generation) caused by the phenomenon is avoided. On the other hand, the traditional method for treating the raw coke oven gas in the coking industry is to spray the circulating ammonia water with the temperature of 70-75 ℃ into the raw coke oven gas, and then the raw coke oven gas enters a subsequent chemical production section for recovery treatment after the temperature of the raw coke oven gas is reduced along with the endothermic evaporation of the circulating ammonia water. This treatment process results in serious waste of raw gas sensible heat. Disclosure of Invention The utility model provides a rising pipe waste heat utilization device, which adopts a circulating working medium to recycle waste heat of raw gas in a rising pipe and is used for heating gas entering a coke oven, so that the heating gas consumption of the coke oven can be effectively reduced, the heat efficiency is improved, the rising pipe waste heat utilization device has a simple structure and is safe to use, molten salt is used as the working medium, and an ultrasonic descaling device is arranged on the inner wall of the rising pipe, so that the inner wall of the rising pipe is not easy to scale. In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme: A device for utilizing waste heat of a rising pipe comprises a heated section, a heat release section, a waste heat leading-out pipeline and a working medium inlet pipeline, wherein the heated section consists of a lower collecting pipe, a heat exchange riser and an upper collecting pipe, the lower collecting pipe and the upper collecting pipe are annular pipes, the lower collecting pipe is arranged on the periphery of the bottom of the rising pipe, the upper collecting pipe is arranged on the periphery of the top of the rising pipe, a plurality of heat exchange risers are circumferentially embedded in the wall of the rising pipe, fins are arranged on one side, facing the inside of the rising pipe, of the heat exchange riser, the lower end of the heat exchange riser is communicated with the lower collecting pipe, the upper end of the heat exchange riser is communicated with the upper collecting pipe, the heat release section is arranged in a furnace gas inlet pipeline and consists of a plurality of annular fin pipes, two ends of the annular fin pipes extend out of the furnace gas inlet pipeline, one end of the annular fin pipes is connected with the upper collecting pipe through the waste heat leading-out pipeline, the other end of the annular fin pipes are connected with the lower collecting pipe through the working medium pipeline, a working medium inlet is arranged on the waste heat leading-out pipeline close to the heat release section, and a valve is arranged at the working medium inlet. The ascending pipe consists of a cylinder body, flanges and a heat preservation layer, wherein the flanges are respectively arranged at two ends of the cylinder body, the heat preservation layer is arranged at the outer side of the cylinder body, the heat exchange vertical pipe is wrapped in the heat preservation layer, a plurality of slits are formed in the cylinder body along the circumferential direction, the heat exchange vertical pipe is embedded in the slits and weld