Limestone slurry supplying system

Abstract

The invention discloses a limestone slurry supplying system. The limestone slurry supplying system comprises two limestone slurry producing systems, wherein the two limestone slurry producing systemsare connected with a first limestone slurry tank through conveying pipes; the first limestone slurry tank is connected with two pumps; the two pumps are both connected with a first adsorbing pipe conveying pipe; electrically operated valves are arranged on the conveying pipes; two parallel electrically operated valves are connected with a second limestone slurry tank; the second limestone slurry tank is communicated with the first limestone slurry tank through a liquid conveying pipe and is also connected with the two pumps; in addition, the two pumps are both connected with the second adsorbing tower conveying pipe; the two absorption towers can be communicated. The two limestone slurry tanks are additionally arranged on the basis of an original supply system and can be mutually used as standby products; the electrically operated valves are additionally arranged on an original limestone slurry inlet pipe; limestone slurry supply modes are flexible and diversified; the storage amount of limestone slurry is increased, storage time is prolonged, safe desulfurization operation is ensured and the aims of saving energy and reducing emission are achieved.

Description

technical field [0001] The invention relates to a wet desulfurization system, in particular to a limestone slurry supply system capable of continuously supplying limestone slurry to an absorption tower. Background technique [0002] Among the flue gas desulfurization methods in thermal power plants, the limestone-gypsum wet flue gas desulfurization process has become the most widely used flue gas desulfurization process in the world due to its advantages of abundant absorbent resources and low cost. When the flue gas discharged from the thermal power plant passes through the absorption tower of the desulfurization system, it chemically reacts with the limestone slurry in the absorption tower, and the gypsum produced is discharged. The desulfurized flue gas passes through the demister and GGH, and finally is discharged into the air. With the increase of environmental pollution, the Ministry of Environmental Protection, the National Development and Reform Commission, and the N...

AI Technical Summary

Problems solved by technology

Each thermal power plant has successively carried out ultra-low emission transformation, which will inevitably increase the capacity of the desulfurization system, improve the desulfurization efficiency, and increase the consumption of limestone slurry. How to optimize the way of limestone slurry supply system and storage of limestone slurry can further ensure desulfurization efficiency. Sulfur dioxide emission up to standard

[0003] At present, the limestone slurry supply system such as figure 2 As shown, it includes No. 1 limestone slurry production system and No. 2 limestone slurry production system. The two limestone slurry production systems are connected to the limestone slurry tank. The limestone slurry tank is connected to two slurry pumps, one of which is running and the other is standby. This structure The existing supply system has the following defects: the transformation of ultra-low emissions needs to increase the supply of limestone slurry, and only one limestone slurry tank is installed. tower, the single supply mode leads to a short storage time and a small storage volume of limestone slurry, which is not enough to meet the demand of the desulfurization system, and thus cannot meet the standard requirements of ultra-low emissions

Images