Common wall structure of reactor and flue gas inlet pipe in flue gas denitrification system

Abstract

The invention discloses a shared-wall structure of a reactor and a smoke inlet pipeline in a smoke denitration system. The shared-wall structure comprises the reactor (1) and the smoke inlet pipeline (2) and is characterized in that a flue wall plate (5), vertical reinforcement ribs (3) connected with the flue wall plate (5) and horizontal reinforcement ribs (4) connected with the vertical reinforcement ribs (3) are arranged on the reactor (1); and the smoke inlet pipeline (2) is connected with the flue wall plate (5) of the reactor (1). By the shared-wall structure of the reactor and the smoke inlet pipeline in the smoke denitration system, the number of equipment and the corresponding maintenance cost are effectively reduced, and the using amounts of steel materials, heat preservation materials and outer protection plate materials are reduced; the requirement on a space during denitration modification is reduced; the structural safety is guaranteed; and the corresponding engineering construction, running and maintenance cost is reduced.

Description

technical field [0001] The invention relates to selective catalytic reduction (SCR) denitrification technology, in particular to a common-wall structure of a reactor and a smoke inlet pipe in a flue gas denitrification system. Background technique [0002] Most of our electricity comes from burning fossil fuels. The source of fossil fuels is unstable, and the quality is also unstable. For every ton of coal burned, about 5-30kg of nitrogen oxides are produced. Power plant boilers have become one of the main fixed sources of air pollution. [0003] In order to improve the quality of the atmospheric environment, the state and some local governments have formulated increasingly stringent nitrogen oxide emission standards for the thermal power industry, requiring measures to be taken for pollution control. "Emission Standards of Air Pollutants for Thermal Power Plants" (GB13223-2011) requires that the NOx emission concentration of units put into operation before 2013 should not ...

AI Technical Summary

Problems solved by technology

This type of structure has the following disadvantages: the expansion joint at the connection between the reactor 1 and the smoke inlet pipe 2 increases the equipment cost and the corresponding maintenance cost of the equipment; it is necessary to add support brackets 10 to support the smoke inlet pipe 2, which will correspondingly Increase the amount of supporting steel; In order to form a closed structure and withstand the corresponding flue gas pressure, the reactor 1 and the smoke inlet pipe 2 need to be equipped with independent flue wall plates and corresponding stiffeners Ribs, this structure will lead to a large amount of steel, and correspondingly, the cost and heat preservation cost of the outer guard plate arranged on the reactor 1 and the smoke inlet pipe 2 are relatively high; There are requirements for support structure and thermal insulation construction, etc. Usually, it is required to leave a space of 1.2m-1.5m between the two flue wall panels. m space influenced the implementation of the retrofit

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