Novel incinerator fuel gas excess heat deeply-recycling and energy level improving technology system

Abstract

The invention discloses a novel incinerator fuel gas excess heat deeply-recycling and energy level improving technology system. The novel incinerator fuel gas excess heat deeply-recycling and energy level improving technology system comprises a high-pressure heat exchanging system, a lithium bromide solution circulating system and a low-temperature fuel gas heat exchanging system. The high-pressure heat exchanging system comprises a high-pressure heat exchanger, a second circulating water pimp and a generator. The lithium bromide solution circulating system comprises a generator, a solution exchanger, an absorber, an evaporator, a condenser, a lithium bromide solution circulating pump, a lithium bromide solution throttling device and a refrigerant water throttling device. The low-temperature fuel gas heat exchanging system comprises an anti-corrosion heat exchanger for circulating water heating, a frist circulating water pump and an evaporator. According to the novel incinerator fuel gas excess heat deeply-recycling and energy level improving technology system, the recovery efficiency of tail gas incinerator fuel gas excess heat can be improved, and the problems of plugging and corrosion during recycling the tail gas incinerator fuel gas excess heat less than an acid dew point are avoided.

Description

technical field [0001] The invention relates to the technical field of waste heat recovery, in particular to a novel incinerator flue gas waste heat deep recovery and energy level upgrading process system. Background technique [0002] Tail gas incinerator is an important production process equipment of natural gas purification plant, and its energy consumption accounts for 40% of the total energy consumption of the plant. The heat losses of the tail gas incinerator include: exhaust smoke loss, excess air loss, heat preservation and heat dissipation loss, and fuel incomplete combustion loss, etc. Among them, the exhaust gas loss accounts for 80% of the total heat loss, and the high temperature of the exhaust gas is the most important factor for the heat loss of the furnace. [0003] For exhaust gas incinerators used in natural gas purification plants, when the exhaust gas temperature drops below 400°C, SO 2 It will be combined with water vapor to generate sulfuric acid vap...

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the problems of insufficient waste heat recovery and low recovery efficiency of flue gas waste heat from natural gas purification plant tail gas incinerators in the prior art, and provide a new type of incinerator flue gas waste heat deep recovery and energy level upgrading process system, which can Improve the waste heat recovery efficiency of tail gas incinerators, and avoid the problem of clogging and corrosion when recovering waste heat from tail gas incinerators below the acid dew point

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