Abstract

The present invention provides a recycling device for high-temperature sensible heat of raw coke oven gas in a coke oven ascension pipe. The device comprises a first ascension pipe heat exchanger separately independently provided at the top of a coke oven, and further comprises a heat exchange device and a circulating pump. The first ascension pipe heat exchanger, the heat exchange device, and the circulating pump are connected into a cycle to form a heat exchange cycle. In the heat exchange cycle, water or heat conduction oil or other heat media are used as a heat exchange medium. After being driven by the circulating pump to absorb heat by means of the first ascension pipe heat exchanger, the heat exchange medium becomes a steam-water mixture or a high-temperature heat medium, then is cooled after passing through the heat exchange device and enters the circulating pump again so as to finish a cycle. The device replaces a debenzolization pipe type furnace and an ammonia distilling pipe type furnace for burning coke oven gas in the conventional chemical production process, the heat efficiency of a coke oven production process system is improved, and waste gas pollutant discharging points are reduced.

IPC Classes  ?

• C10B 27/00 - Arrangements for withdrawal of the distillation gases
• F22B 1/18 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines

Abstract

A straight fin for a device for recovering the waste heat of raw coke oven gas in the ascension pipe of the coke oven includes the straight fin body and a group of V-shaped notches disposed on the straight fin body. The depth h of the V-shaped notches is less than the width H of the straight fin body. The distances between the adjacent V-shaped notches increase from bottom to top in the longitudinal direction of the straight fin body. The present invention further provides a heat recovering device and a power generation device both including the straight fins. Moreover, the width, the angle, and the distances in the longitudinal direction of the V-shaped notches at the top of the straight fin are determined according to the temperature field distribution during use of the device.

IPC Classes  ?

• C10B 3/02 - Coke ovens with vertical chambers with heat-exchange devices
• F22B 1/18 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
• F27D 17/00 - Arrangements for using waste heatArrangements for using, or disposing of, waste gases
• F28F 1/40 - Tubular elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element

Abstract

A straight fin for a device for recovering and removing waste heat of raw coke oven gas in a riser of a coke oven, comprising a straight fin body (1) and a group of V-shaped notches (2) disposed on the straight fin body (1). The depth h of the V-shaped notches (2) is less than the width H of the straight fin body (1). The distances between the adjacent V-shaped notches (2) increase from bottom to top in the longitudinal direction of the straight fin body (1). Also provided are a heat removal device and a power generation device both comprising the straight fin. The straight fin is simple in structure, low in cost, and convenient to use, and can enhance the heat transfer performance of a raw coke oven gas side, and increase the temperature of a wall surface. Moreover, the width, the angle and the distances in the height direction of the V-shaped notches (2) at the top of the straight fin are determined according to the temperature field distribution during use.

IPC Classes  ?

• C10B 27/00 - Arrangements for withdrawal of the distillation gases
• C10B 41/08 - Safety devices, e.g. signalling or controlling devices for use in the discharge of coke for the withdrawal of the distillation gases
• F22B 1/18 - Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
• F28F 3/02 - Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations