System and method for emergently cutting off water supply of failure ascending pipe heat exchangers

Abstract

The invention provides a system and method for emergently cutting off water supply of failure ascending pipe heat exchangers. At most five ascending pipe heat exchangers are arranged into one group, the ascending pipe heat exchangers are arranged between a water inlet pipeline branch pipe and a backflow branch pipe in parallel, and at least one segmented emergency pipe is connected with capillarybackflow pipes and capillary water inlet pipes of the ascending pipe heat exchangers in the same group. The two ends of the emergency pipe are connected with a water supplementing pump and a water drainage pipe net correspondingly. The emergency pipe comprises a plurality of segments and stop valves arranged among the segments, the water supplementing pump and the water drainage pipe net. Water supply of the ascending pipe heat exchangers is independently cut off online under the situation that the total net weight of the pipe net of an ascending pipe heat exchanger system is not greatly increased.

Description

technical field [0001] The invention relates to the field of waste heat utilization devices, in particular to a system and method for emergency isolation of water supply to a heat exchanger of a failed riser. Background technique [0002] The raw gas temperature at the outlet of the coking chamber of the coke oven ascending pipe is about 750°C. The raw coal gas enters the bridge pipe after passing through the ascending pipe, and enters the gas collecting pipe after being cooled by sprayed ammonia water in the bridge pipe section. At this time, the raw gas temperature drops to 85°C. The heat taken away by raw gas accounts for 36% of the total heat of coking. In order to recover this part of the heat, at present, four types of rising pipe waste heat utilization systems are used in China: 1. An annular jacket is welded on the outer wall of the rising pipe, soft water is introduced into the lower part of the jacket, and heat is exchanged between the water in the jacket and the h...

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Problems solved by technology

[0006] More importantly, if figure 2 As shown, the riser heat exchanger system pipe network and gas collecting pipes are installed on the bracket 701 connected to the steel column 700 on the side of the coke oven. Adding a spare pipe network will further increase the bearing capacity of the steel column 700 on the side of the coke oven. , so that the upper part of the coke oven tightens the tension of the horizontal braces 702 of the steel columns 700 on both sides of the coke oven to increase, so that the horizontal braces 702 yield and fail under the action of tension

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