Dense-phase semi-dry flue gas desulfurization device and method thereof

Abstract

The invention discloses a dense-phase semi-dry flue gas desulfurization device and a method thereof. The dense-phase semi-dry flue gas desulfurization device comprises a desulfurization tower, a first dust remover, a second dust remover, a flue gas pipeline, a desulfurizer raw material tank and a water tank, wherein the two sides of the desulfurization tower are connected with a gas inlet pipe and a gas outlet pipe respectively, the flue gas pipeline is connected with the first dust remover, the first dust remover is connected with a gas inlet pipe of the desulfurization tower through two horizontal ports of a three-way pipe, the other port of the three-way pipe is connected with a desulfurizer raw material tank, a preheater is arranged between the gas inlet pipe of the desulfurization tower and the three-way pipe, a spray head is arranged at the top end in the desulfurization tower, and the spray head is connected with a water tank outside the desulfurization tower through a water pipe. A gas outlet pipe of the desulfurization tower is connected with a second dust remover. According to the dense-phase semi-dry flue gas desulfurization device and the method thereof provided by the invention, the desulfurization device and process are improved, and the desulfurization tower interlayer and the buffer filler are arranged, so that the desulfurization rate can be improved, and the wall wetting phenomenon can be reduced.

Description

technical field [0001] The invention belongs to the technical field of flue gas desulfurization, and more particularly, relates to a dense phase semi-dry flue gas desulfurization device and a method thereof. Background technique [0002] In recent years, "smog" has become a common weather phenomenon in the world. One of the reasons for it is the exhaust gas emitted by industrial production, SO in the exhaust gas 2 The content is the control index for each country to prevent the further deterioration of air pollution. Flue gas desulfurization methods are generally divided into wet, dry and semi-dry methods. Among them, the secondary pollution, waste water treatment and corrosion phenomena of wet desulfurization are very serious. Dry desulfurization has low efficiency, huge equipment, large investment and unstable operation. The semi-dry desulfurization process is a three-phase reaction (ie gas, liquid, Solid three-phase), the final product is dry powder, which overcomes the...

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Problems solved by technology

[0004] However, there are two main problems in the existing semi-dry flue gas desulfurization technology: one is that during the reaction process of the desulfurization tower, due to the high temperature of the air flow, the excessive temperature difference between the inner wall of the desulfurization tower and the air flow is likely to cause wet wall phenomenon, thereby causing corrosion of equipment , thereby affecting the system operation; second, the residence time of the desulfurizer in the desulfurization tower is not enough, resulting in a low utilization rate of the desulfurizer, resulting in a low desulfurization rate and waste of raw materials

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