Boiler exhaust gas recycling and recovering equipment

Abstract

The invention discloses boiler exhaust gas recycling and recovering equipment. The equipment comprises a boiler, a steam bleeding tank, a workshop steam device, a water tank, an exhaust gas recovering pressure storage tank and a boiler feed water heating tank, wherein a steam exhaust port of the boiler is connected with a steam inlet of the steam bleeding tank through a steam discharge pipeline; a steam outlet of the steam bleeding tank is connected with the steam inlet of the workshop steam device through a steam inlet pipeline; a steam return port of the workshop steam device is connected with a steam return pipeline; the steam return pipeline comprises a first pipeline and a second pipeline; the first pipeline is connected with the steam inlet of the water tank; the water tank is provided with a water pipeline; the second pipeline is connected with the steam inlet of the exhaust gas recovering pressure storage tank and the steam inlet of the boiler feed water heating tank respectively; the steam exhaust port of the exhaust gas recovering pressure storage tank and a water supply port of the boiler feed water heating tank are connected with a water supply pipe of the boiler through a high pressure water pump respectively; and the water supply pipe of the boiler is connected with the steam inlet of the boiler. The equipment can improve the utilization ratio of the exhaust gas,save the boiler feed water, reduce the treatment cost of softened water and save the energy and protect the environment.

Description

technical field [0001] The invention relates to the technical field of tail gas circulation application recovery, in particular to a boiler tail gas circulation application recovery equipment. Background technique [0002] Industrially, boilers produce a large amount of exhaust gas during use. According to relevant statistics, the temperature of exhaust gas discharged from boilers used in most factories is generally 220°C to 230°C, and the thermal efficiency is about 86% to 90%. The exhaust gas contains a large amount of heat energy that can be utilized. If the waste heat of the exhaust gas is wasted, the loss will be great. Therefore, it is of great value to develop a boiler tail gas recovery device, which can not only significantly improve the thermal efficiency of the boiler, but also bring considerable economic benefits to users. [0003] However, in the prior art, the tail gas discharged from the boiler is not reused, but directly or indirectly discharged into the atm...

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Problems solved by technology

However, the return steam utilization rate of this kind of boiler tail gas is extremely low, so that the secondary steam generated cannot be fully recovered. In addition, the temperature of the soft water stored in the soft water tank is not enough. If it is directly sent to the boiler, the boiler still needs to run longer Heating for a long time will not only lengthen the combustion time of the boiler, but also increase the sewage discharge of the boiler

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