Dry type bag dedusting temperature control system and temperature control method

Abstract

The invention discloses a temperature control system and method for dry bag dust removal. The temperature control system includes: a regenerative steam drum, a heat exchanger and a control device. The regenerative steam drum is provided with a pressure sensor and a temperature sensor. , and are connected with a heating steam pipe, an external steam supply pipe, a water supply pipe, a water discharge pipe, an ascending pipe and a down pipe, and the heating steam pipe, external steam supply pipe, water supply pipe and water discharge pipe are provided with valves; The heat exchanger is provided with a water channel and a gas channel that exchange heat with each other; the down pipe is connected to the water channel inlet through a water pump, and the water channel outlet is connected to the rising pipe; the gas channel inlet is connected to a raw coal gas source, and the The gas channel outlet is connected to the dry bag inlet; the control device is used to control the opening and closing of the valves on each pipeline according to the signal from the pressure sensor or temperature sensor. The invention utilizes a regenerative steam drum and uses the boiler water in the steam drum as a stable constant temperature source to realize two-way adjustment of the gas temperature.

Description

technical field [0001] The invention relates to the technical field of temperature control, in particular to a temperature control system of a dry bag dust removal system. Background technique [0002] Dry bag dust removal technology is a blast furnace gas dust removal technology that has been popularized and applied in large-scale blast furnaces nationwide in recent years. Small environmental pollution and other advantages. However, the bag filter material used in the dry bag filter system has a certain operating temperature range. At present, the maximum operating temperature of the commonly used filter material does not exceed 260°C for continuous operation, and does not exceed 280°C for an instant. When the temperature is higher than the maximum operating temperature, it will The service life of the bag is shortened, and even the bag is burned, which affects the normal production of the blast furnace. When the temperature is lower than the minimum temperature, the surf...

AI Technical Summary

Problems solved by technology

The advantage of the heat exchange technology of the heat exchanger is that the operation cost is low and the technology is simple, but there are also obvious disadvantages: 1) The opening speed of the valve on the raw gas pipeline is slow and cannot be switched quickly

2) Adapt to a narrow temperature range

[0007] From the above introduction, it can be seen that the dry bag filter system of the prior art has various problems in the gas control technology of extreme temperature

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