CN-224207766-U - Reaction system for CO catalytic oxidation of sintering flue gas

CN224207766UCN 224207766 UCN224207766 UCN 224207766UCN-224207766-U

Abstract

The utility model discloses a reaction system for CO catalytic oxidation of sintering flue gas, which comprises a desulfurizing tower, a GGH flue gas heat exchanger, a heating furnace and a CO catalytic oxidation reactor which are sequentially arranged along the flow direction of the sintering flue gas, wherein the GGH flue gas heat exchanger is provided with a first input port, a first output port, a second input port and a second output port, the first input port is connected with the outlet of the desulfurizing tower, the first output port is connected with the inlet of the heating furnace, the second input port is connected with the outlet of the CO catalytic oxidation reactor, the second output port is connected with a flue gas discharge unit, and the CO catalytic oxidation reactor comprises a reactor main body, and a flue gas uniform distribution module, a denitration catalyst module and a CO catalyst module which are sequentially arranged in the reactor main body along the flow direction of the flue gas. The utility model can realize the high-efficiency treatment of the flue gas, greatly improve the CO removal efficiency and meet the environmental protection requirement that the CO emission is lower than 2800mg/Nm 3 .

Inventors

Yu Pufa
LIANG FENG
GAO XIAOHONG
KONG QINGHU

Assignees

北京清新环境技术股份有限公司

Dates

Publication Date: 20260508
Application Date: 20250410

Claims (7)

1. The reaction system for CO catalytic oxidation of the sintering flue gas is characterized by comprising a desulfurizing tower, a GGH flue gas heat exchanger, a heating furnace and a CO catalytic oxidation reactor which are sequentially arranged along the flow direction of the sintering flue gas; The GGH flue gas heat exchanger is provided with a first input port, a first output port, a second input port and a second output port, wherein the first input port is connected with the outlet of the desulfurizing tower, and the first output port is connected with the inlet of the heating furnace; The CO catalytic oxidation reactor comprises a reactor main body, and a flue gas uniform distribution module, a denitration catalyst module and a CO catalyst module which are sequentially arranged in the reactor main body along the flue gas flow direction; The flue gas equipartition module includes guide plate portion and square hole rectification grid, guide plate portion with square hole rectification grid installs in proper order from top to bottom in the reactor main part, just the upper portion diameter of guide plate portion is less than the lower part diameter of guide plate portion to form the round platform form shape with reactor main part upper portion shape looks adaptation.
2. The reaction system of claim 1, wherein the desulfurization tower is a wet desulfurization tower or a dry desulfurization tower.
3. The reaction system of claim 1, wherein a reactor inlet is provided at the top of the reactor body, a reactor outlet is provided at the bottom of the reactor body, the reactor inlet is connected to the outlet of the heating furnace, and the reactor outlet is connected to the second input port; The pipeline connected with the inlet of the reactor is provided with a pressure gauge, a thermometer, a flowmeter and a CO concentration meter, and the pipeline connected with the outlet of the reactor is provided with the pressure gauge, the thermometer and the CO concentration meter.
4. The reaction system of claim 1 wherein the baffle portion is comprised of a plurality of baffles in an annular spaced arrangement.
5. The reaction system of claim 1 wherein the off-market catalyst module is a honeycomb off-market catalyst mounted within the reactor body by a first catalyst support grid.
6. The reaction system of claim 1 wherein the CO catalyst module is a ceramic honeycomb catalyst mounted within the reactor body by a second catalyst support grid.
7. The reaction system of claim 6, wherein the ceramic honeycomb catalyst comprises a ceramic honeycomb support having a surface-supported metal layer required for the reaction.

Description

Reaction system for CO catalytic oxidation of sintering flue gas Technical Field The utility model relates to the technical field of flue gas CO treatment, in particular to a reaction system for catalytic oxidation of sintering flue gas CO. Background With the rapid development of society, the living quality of the national is greatly improved, meanwhile, the problem of environmental pollution is increasingly remarkable, and a great amount of industrial waste gas is discharged, especially in the steel industry, so that heavy pressure is brought to the atmospheric environment. The steel industry is an important mainstay in industry and is faced with serious pollutant emission challenges during production, where carbon monoxide (CO) emission problems are particularly troublesome. The sintering link of steel production is called CO emission 'heavy disaster area', and the emission amount of the sintering link is about 70% of the whole steel plant. CO has extremely strong toxicity, called "poison not valued in the 21 st century". Once the human or animal inhales the excess CO, the CO can rapidly bind to hemoglobin in the blood, impeding the transport of oxygen, and thereby severely affecting the cardiovascular system, causing irreparable damage. This not only poses a disruption to the ecological environment, but also poses a serious threat to public health. At present, common process optimization means such as CO flue gas back burning, oxygen-enriched combustion and the like adopted by steel production enterprises are difficult to enable CO emission to reach relevant standards. Therefore, the development of an efficient sintering flue gas CO catalytic oxidation reaction system is not slow, and the method has extremely important significance for sustainable development of the steel industry and improvement of atmospheric environment quality. Disclosure of utility model Aiming at the defects existing in the prior art, the utility model provides a reaction system for catalytic oxidation of CO in sintering flue gas. The utility model discloses a reaction system for CO catalytic oxidation of sintering flue gas, which comprises a desulfurizing tower, a GGH flue gas heat exchanger, a heating furnace and a CO catalytic oxidation reactor which are sequentially arranged along the flow direction of the sintering flue gas; The GGH flue gas heat exchanger is provided with a first input port, a first output port, a second input port and a second output port, wherein the first input port is connected with the outlet of the desulfurizing tower, and the first output port is connected with the inlet of the heating furnace; The CO catalytic oxidation reactor comprises a reactor main body, and a flue gas uniform distribution module, a denitration catalyst module and a CO catalyst module which are sequentially arranged in the reactor main body along the flue gas flow direction. As a further improvement of the present utility model, the desulfurizing tower is a wet desulfurizing tower or a dry desulfurizing tower. As a further improvement of the utility model, the top of the reactor main body is provided with a reactor inlet, the bottom of the reactor main body is provided with a reactor outlet, the reactor inlet is connected with the outlet of the heating furnace, and the reactor outlet is connected with the second input port; The pipeline connected with the inlet of the reactor is provided with a pressure gauge, a thermometer, a flowmeter and a CO concentration meter, and the pipeline connected with the outlet of the reactor is provided with the pressure gauge, the thermometer and the CO concentration meter. As a further improvement of the utility model, the flue gas uniform distribution module comprises a guide plate part and a square hole rectifying grid, wherein the guide plate part and the square hole rectifying grid are sequentially arranged in the reactor main body from top to bottom, and the diameter of the upper part of the guide plate part is smaller than that of the lower part of the guide plate part. As a further improvement of the present utility model, the deflector portion is constituted by a plurality of deflector plates annularly spaced apart. As a further development of the utility model, the off-market catalyst module is a honeycomb off-market catalyst which is mounted in the reactor body by means of a first catalyst support grid. As a further development of the utility model, the CO catalyst module is a ceramic honeycomb catalyst which is mounted in the reactor body by means of a second catalyst support grid. As a further improvement of the present utility model, the honeycomb ceramic catalyst comprises a honeycomb ceramic support, the surface of which is supported with a metal layer required for the reaction. Compared with the prior art, the utility model has the beneficial effects that: The utility model realizes the efficient treatment of the flue gas by the cooperative work of the flue gas heat exchanger and