Internal circulation dry-process purification technology and equipment

Abstract

The invention discloses an internal circulation dry purification technology and equipment, comprising a clean air chamber, a bag filter box, a material collection device and a supporting device, the top of the bag filter box is equipped with a clean air room, and the bottom is installed with a material collection device, support devices are installed around the bottom, the side wall of the clean air chamber is provided with an air outlet, the inside of the bag filter box is provided with a flower plate, a filter device and an internal circulation pipe, and louvers are installed on the top side wall of the internal circulation pipe A tuyere, the side wall of the internal circulation pipe in contact with the material collection device is provided with a circulation material port, a fluidized bed is installed on the outer wall of the internal circulation pipe between the circulation material port and the air inlet, and the side wall of the material collection device A material overflow port is provided, and an emptying port is provided on the bottom side wall of the material collecting device. The invention has good filtering effect, high purification efficiency, compact structure, less space occupation, low investment and operation cost, low operation management and maintenance cost, and can realize the goal of energy saving and emission reduction.

Description

Technical field [0001] The invention relates to the field of dry purification technology, in particular to an internal circulation dry purification technology and equipment. Background technique [0002] In the aluminum electrolysis dry flue gas purification system and the flue gas desulfurization dry purification system, the bag filter is generally used as the main filtration and purification equipment. In all existing domestic equipment, whether it is side air intake or lower air intake, the smoke The air enters the filter section from the bottom of the dust collector, and enters the upper box (clean air chamber) after filtering through the filter bag. When the flue gas rises and passes through the filter bag, the dust rises in the air flow due to gravity. The medium gradually settles, and at the same time, due to the decrease of the flow rate between the bags, more dust settles down, some of which fall directly into the dust hopper (lower box) of the dust collector, and the ot...

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Problems solved by technology

[0002] In the aluminum electrolysis flue gas dry purification system and the flue gas desulfurization dry purification system, the bag filter is generally used as the main filtration and purification equipment. The gas enters the filter section from the bottom of the dust collector, passes through the filter bag and then enters the upper box (clean air chamber). During the process of the flue gas rising and passing through the filter bag, due to the action of gravity, the dust in the process of rising in the airflow At the same time, due to the reduction of the flow rate between the bags, more dust will settle down, part of which will directly fall into the ash hopper (lower box) of the dust collector, and the other part will be attached to the filter bag with the movement of the flue gas during the settlement process. In the vertical direction, the dust distribution on the surface of the filter bag is uneven, showing a phenomenon of more down and less up, and vertical imbalance, which affects the performance of the bag filter's "dust filter dust" and also affects the effective adsorption performance of the dry purification system. Play to reduce the purification efficiency of the system and equipment

[0003] In addition, due to the large amount of equipment required by the existing system, especially the large number of recycle material feeding points, the increase in equipment leads to difficulties in operation management, repair and maintenance, and increases the cost of system and equipment operation and management, which is not conducive to energy saving and reduction of the system. Row

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