CN216378074U - CO suitable for blast furnace gas2Trapping and utilizing device - Google Patents

Abstract

The utility modelThe model provides a CO suitable for blast furnace gas₂The trapping and utilizing device comprises a bag type dust collector, a hydrolysis tower, a two-stage desulphurization device and CO arranged in sequence along the coal gas treatment direction₂An adsorption and removal device, the bag type dust collector is used for reducing the concentration of inlet particulate matters, and the hydrolysis tower is used for hydrolyzing and converting organic sulfur in blast furnace gas into CO₂And H₂S, the two-stage desulfurization device is used for reducing the concentration of acid gas, CO₂The adsorption and desorption device comprises an adsorption bed, a cooling bed and a desorption regeneration bed which are sequentially arranged along the gas treatment direction, wherein the adsorption bed is used for adsorbing CO₂CO in coal gas₂In the adsorption bed with CO₂The reacted adsorbent is conveyed into a cooling bed and is mixed with CO again₂Reaction, the absorbent saturated in the cooling bed is conveyed into the desorption regeneration bed, and CO is heated to be₂And (6) analyzing. The device can reduce the trapping energy consumption and realize the CO in the blast furnace gas₂High-efficiency adsorption and trapping.

Description

CO suitable for blast furnace gas2Trapping and utilizing device

[ technical field ] A method for producing a semiconductor device

The utility model relates to CO₂The technical field of emission treatment, in particular to CO suitable for blast furnace gas₂A trapping and utilizing device.

[ background of the utility model ]

In recent years, CO has become a source of₂The greenhouse effect caused by excessive emissions has attracted a great deal of attention from international society. Coal-fired power plants are the most important carbon emission source in China, and the development of carbon capture technology suitable for the coal-fired power plants is imperative. In a number of carbon capture technologies, solid adsorption removes CO₂The technology becomes one of the current research hotspots due to the advantages of good compatibility with coal-fired power plants, no corrosion, no secondary pollution and the like. The traditional process adopts a chemical absorption method to carry out CO₂The adsorption and the trapping energy consumption are high, and the control to 2.5GJ/t CO is difficult₂In addition, a CO suitable for blast furnace gas is provided₂A trapping and utilizing device.

[ Utility model ] content

The utility model aims to solve the problems in the prior art and provides CO suitable for blast furnace gas₂The trapping and utilizing device can reduce the trapping energy consumption and realize the CO in the blast furnace gas₂High-efficiency adsorption and trapping.

In order to achieve the purpose, the utility model provides CO suitable for blast furnace gas₂The trapping and utilizing device comprises a bag type dust collector, a hydrolysis tower, a two-stage desulphurization device and CO arranged in sequence along the coal gas treatment direction₂An adsorption and removal device, the bag type dust collector is used for reducing the concentration of inlet particulate matters, and the hydrolysis tower is used for hydrolyzing and converting organic sulfur in blast furnace gas into CO₂And H₂S, the two-stage desulfurization device is used for reducing the concentration of acid gas, CO₂The adsorption and desorption device comprises an adsorption bed, a cooling bed and a desorption regeneration bed which are sequentially arranged along the gas treatment direction, wherein the adsorption bed is used for adsorbing CO₂CO in coal gas₂In the adsorption bed with CO₂The reacted adsorbent is conveyed into a cooling bed and is mixed with CO again₂Reaction, the absorbent saturated in the cooling bed is conveyed into the desorption regeneration bed, and CO is heated to be₂And (6) analyzing.

Preferably, a first adsorbent adding port and a first adsorbent output port are arranged on the adsorption bed, a second adsorbent adding port, a first adsorbent input port and a second adsorbent output port are arranged on the cooling bed, the first adsorbent output port is connected with the first adsorbent input port of the cooling bed through a first lifting pipe, the adsorbent after reaction in the adsorption bed is conveyed to the cooling bed through the first lifting pipe, a second adsorbent input port is arranged on the desorption regeneration bed, the second adsorbent output port is connected with the second adsorbent input port of the desorption regeneration bed through a second lifting pipe, and the adsorbent saturated in adsorption in the cooling bed is conveyed to the desorption regeneration bed through the second lifting pipe.

Preferably, the adsorption bed is a bubbling bed, and a plurality of adsorbent beds containing CO are arranged in the bed body of the adsorption bed₂The gas is adsorbed by the adsorbent bed.

Preferably, the adsorption bed is also internally provided with a plurality of layers of air distribution plates and a multi-stage heat exchanger, and the multi-stage heat exchanger is used for cooling the adsorption process of the adsorption bed so as to control the reaction temperature.

Preferably, a water-cooled wall is arranged in the cooling bed and used for controlling the reaction temperature.

Preferably, a cyclone separator is arranged in the cooling bed and used for performing coarse and fine separation on the adsorbent, a part of large-particle adsorbent cooled in the cooling bed returns to the adsorption bed, and the small-particle adsorbent saturated in adsorption is conveyed to the desorption regeneration bed through the second lifting pipe.

Preferably, the two-stage desulfurization device comprises a coarse desulfurization tower and a fine desulfurization tower which are sequentially arranged along the gas treatment direction, the coarse desulfurization adopts limestone-gypsum wet desulfurization, and the fine desulfurization adopts alkali liquor spray desulfurization.

The utility model has the beneficial effects that: the utility model passes CO₂The two-stage adsorption reaction of the adsorption and removal device realizes more than 95 percent of CO in the blast furnace gas₂Absorbed and trapped, and the energy consumption for trapping can be controlled to be 1.5GJ/t CO₂The technical bottleneck that the energy consumption of the traditional process (chemical absorption method) is high is solved.

The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.

[ description of the drawings ]

FIG. 1 shows CO suitable for blast furnace gas according to the utility model₂A schematic structural view of the trapping and utilizing device;

FIG. 2 is a schematic view of the structure of an adsorption bed in the present invention;

FIG. 3 is a schematic view of the structure of the cooling bed of the present invention;

FIG. 4 is a schematic view of a desorption/regeneration bed according to the present invention.

[ detailed description ] embodiments

Referring to fig. 1 to 4, the CO2 capturing and utilizing device for blast furnace gas according to the present invention comprises a bag type dust collector 1, a hydrolysis tower 2, a two-stage desulfurizing device 3, a CO2, which are sequentially arranged along a gas treatment direction₂An adsorption and removal device 4, the bag type dust collector 1 is used for reducing the concentration of inlet particulate matters, and the hydrolysis tower 2 is used for removing organic sulfur in blast furnace gasConversion to CO by hydrolysis₂And H₂S, the reaction is carried out at a lower temperature (less than 200 ℃) and a lower pressure (less than 30kPa), and the conversion rate is more than 99 percent. The two-stage desulfurization device 3 is used for reducing the concentration of acid gas, CO₂The adsorption and removal device 4 comprises an adsorption bed 41, a cooling bed 42 and a desorption and regeneration bed 43 which are arranged in sequence along the gas treatment direction, wherein the adsorption bed 41 is used for adsorbing CO₂CO in coal gas₂In the adsorption bed 41 with CO₂The reacted sorbent is transported to the cooling bed 42 where it is again reacted with CO₂Reaction, the absorbent saturated in the cooling bed 42 is transferred to the desorption regeneration bed 43, and CO is heated₂And (6) analyzing.

Furthermore, the adsorption bed 41 is provided with a first adsorbent addition port 411 and a first adsorbent output port 412, the cooling bed 42 is provided with a second adsorbent addition port 421, a first adsorbent input port 422 and a second adsorbent output port 423, the first adsorbent output port 412 is connected to the first adsorbent input port 422 of the cooling bed 42 through a first riser 413, the adsorbent reacted in the adsorption bed 41 is conveyed to the cooling bed 42 through the first riser 413, the desorption regeneration bed 43 is provided with a second adsorbent input port 431, the second adsorbent output port 423 is connected to the second adsorbent input port 431 of the desorption regeneration bed 43 through a second riser 424, and the adsorbent saturated in adsorption in the cooling bed 42 is conveyed to the desorption regeneration bed 43 through the second riser 424.

Further, the adsorption bed 41 is a bubbling bed, and a plurality of adsorbent beds containing CO are arranged in the bed body of the adsorption bed 41₂The gas is adsorbed by the adsorbent bed.

Further, a plurality of layers of air distribution plates and a multi-stage heat exchanger are arranged in the adsorption bed 41, and the multi-stage heat exchanger is used for cooling the adsorption process of the adsorption bed 41 so as to control the reaction temperature.

Further, a water wall is arranged in the cooling bed 42 for controlling the reaction temperature.

Furthermore, a cyclone separator is arranged in the cooling bed 42 for performing coarse and fine separation on the adsorbent, a part of large-particle adsorbent cooled in the cooling bed 42 returns to the adsorption bed 41, and the small-particle adsorbent saturated in adsorption is conveyed to the desorption regeneration bed 43 through the second riser 424.

Further, the two-stage desulfurization device 3 comprises a coarse desulfurization tower 31 and a fine desulfurization tower 32 which are sequentially arranged along the gas treatment direction, wherein the coarse desulfurization adopts limestone-gypsum wet desulfurization, and the fine desulfurization adopts alkali liquor spray desulfurization.

The working principle of the adsorption bed is as follows: the lower end of the adsorption bed is fed with CO₂The coal gas is discharged from the upper end through the adsorption purification (primary purification) of the adsorbent in the bed body and enters a cooling bed for secondary purification. The adsorption bed is provided with an adsorbent feeding port, and a plurality of layers of air distribution plates and multi-stage heat exchangers are arranged in the bed body, so that the uniform distribution of the materials in the bed body is ensured, and the reaction temperature is controlled in an optimal interval. The attrition crushed sorbent particles are transported to the cooling bed through the riser.

The working principle of the cooling bed is as follows: air is fed from the lower end, air is discharged from the upper end, an adsorbent charging port is arranged, an air distribution plate and a heat exchanger (water-cooled wall) are arranged in the bed body, a cyclone separator is arranged for coarse-fine separation, and part of the cooled adsorbent particles can continuously return to the adsorbent bed to adsorb CO₂(large particles), small particles saturated with adsorption can further enter the regeneration bed through the riser.

The working principle of the regeneration bed is as follows: by heating CO₂And (6) analyzing.

The working process of the utility model is as follows: the bag type dust collector 1, the hydrolysis tower 2 and the two-stage desulphurization device 3 are used as CO₂The pretreatment system of the adsorption and removal device 4 ensures that the concentration of inlet particles is lower than 5mg/m³，SO₂、H₂The concentration of the acid gas such as S is less than 1 ppm. A plurality of adsorbent layers (the particle size of the adsorbent ranges from 1 mm to 20mm) containing CO are arranged in the bed body of the adsorption bed 41₂The coal gas is adsorbed through the adsorbent bed layer, the adsorption process is an exothermic reaction, the temperature is reduced through the heat exchanger, and the reaction temperature is controlled in a proper range; the attrition rate of the adsorbent particles during the reaction is relatively fast, and when the particle size of the particles falls to a certain range, the particles are transported to a cooling bed 42 through a first riser, and the bed is provided with an additional second adsorbent feeding port to fluidize the bedIs in the bed body and is in contact with CO₂Reaction, controlling the reaction temperature by the water cooling wall in the bed, and realizing more than 95 percent of CO in the blast furnace gas by two-stage adsorption reaction₂Is absorbed and trapped; the final adsorbent particles saturated with adsorption are transported to the desorption regeneration bed 43 through the second riser, and CO is heated₂Analyzing; resolved CO₂The method can be used for the working procedures of top-blown converter steelmaking, converter bottom blowing replacing argon, continuous casting process protective gas, blast furnace ironmaking coal powder conveying and carbon dioxide blowing refining: LF, AOD etc. also can replace partial nitrogen gas and be used for the pipeline to sweep, can also be used for mineralize mineralization slag simultaneously. The blast furnace gas contains more than 20 percent of CO per se, and CO is removed₂Then, the CO concentration is higher, and the heat value of the coal gas is higher.

The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.

Claims (7)

1. CO suitable for blast furnace gas₂The trapping and utilizing device is characterized in that: comprises a bag type dust collector (1), a hydrolysis tower (2), a two-stage desulphurization device (3) and CO which are arranged in sequence along the coal gas treatment direction₂An adsorption and removal device (4), the bag type dust collector (1) is used for reducing the concentration of inlet particulate matters, and the hydrolysis tower (2) is used for hydrolyzing and converting organic sulfur in blast furnace gas into CO₂And H₂S, the two-stage desulfurization device (3) is used for reducing the concentration of acid gas, CO₂The adsorption and removal device (4) comprises an adsorption bed (41), a cooling bed (42) and a desorption regeneration bed (43) which are arranged in sequence along the gas treatment direction, wherein the adsorption bed (41) is used for adsorbing CO₂CO in coal gas₂Inside the adsorption bed (41) with CO₂The reacted adsorbent is transported to a cooling bed (42) and is again contacted with CO₂Reaction, the absorbent saturated in the cooling bed (42) is conveyed to the desorption regeneration bed (43), and CO is heated to react₂And (6) analyzing.

2. CO suitable for blast furnace gas according to claim 1₂The trapping and utilizing device is characterized in that: a first adsorbent adding port (411) and a first adsorbent output port (412) are arranged on the adsorption bed (41), the cooling bed (42) is provided with a second adsorbent feed inlet (421), a first adsorbent input port (422) and a second adsorbent output port (423), the first adsorbent outlet (412) is connected to a first adsorbent inlet (422) of the cooling bed (42) via a first riser (413), the reacted adsorbent in the adsorption bed (41) is conveyed to the cooling bed (42) through a first lifting pipe (413), the desorption regeneration bed (43) is provided with a second adsorbent inlet (431), the second adsorbent output port (423) is connected with a second adsorbent input port (431) of the desorption regeneration bed (43) through a second riser (424), the absorbent saturated in the cooling bed (42) is conveyed to the desorption regeneration bed (43) through a second lifting pipe (424).

3. CO suitable for blast furnace gas according to claim 1₂The trapping and utilizing device is characterized in that: the adsorption bed (41) is a bubbling bed, a plurality of adsorbent bed layers containing CO are arranged in the bed body of the adsorption bed (41)₂The gas is adsorbed by the adsorbent bed.

4. CO suitable for blast furnace gas according to claim 3₂The trapping and utilizing device is characterized in that: the adsorption bed (41) is also internally provided with a plurality of layers of air distribution plates and a multi-stage heat exchanger, and the multi-stage heat exchanger is used for cooling the adsorption process of the adsorption bed (41) so as to control the reaction temperature.

5. CO suitable for blast furnace gas according to claim 1₂The trapping and utilizing device is characterized in that: a water-cooled wall is arranged in the cooling bed (42) and is used for controlling the reaction temperature.

6. CO suitable for blast furnace gas according to claim 1₂The trapping and utilizing device is characterized in that: a cyclone separator is arranged in the cooling bed (42) and used for separating the adsorbent in a coarse-fine mode, and one part of the cooled adsorbent in the cooling bed (42)The large-particle adsorbent is returned to the adsorption bed (41), and the small-particle adsorbent saturated in adsorption is conveyed to the desorption regeneration bed (43) through the second lifting pipe (424).

7. CO suitable for blast furnace gas according to claim 1₂The trapping and utilizing device is characterized in that: the two-stage desulfurization device (3) comprises a coarse desulfurization tower (31) and a fine desulfurization tower (32) which are sequentially arranged along the coal gas treatment direction, the coarse desulfurization adopts limestone-gypsum wet desulfurization, and the fine desulfurization adopts alkali liquor spray desulfurization.

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