CN217809274U - Blast furnace gas fine desulfurization processing system - Google Patents
Blast furnace gas fine desulfurization processing system Download PDFInfo
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- CN217809274U CN217809274U CN202221645491.1U CN202221645491U CN217809274U CN 217809274 U CN217809274 U CN 217809274U CN 202221645491 U CN202221645491 U CN 202221645491U CN 217809274 U CN217809274 U CN 217809274U
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Abstract
The utility model relates to a blast furnace gas fine desulfurization processing system. The blast furnace gas fine desulfurization treatment system comprises a heat exchanger, a hydrolysis tower and a desulfurization tower, an air inlet pipe of the heat exchanger is connected with a blast furnace gas pipeline, a pressurizing fan is arranged on the blast furnace gas pipeline, an air outlet pipe of the heat exchanger is connected with an air inlet pipe of the hydrolysis tower through a first connecting pipe, an air outlet pipe of the hydrolysis tower is connected with an air inlet pipe of the desulfurization tower through a second connecting pipe, the desulfurization tower comprises a tower body, an adsorption component is arranged in the tower body, the adsorption component comprises an outer ring net and an inner ring net, and an upper sealing plate and a lower sealing plate which are respectively connected to the upper end and the lower end of the outer ring net and the upper end and the lower end of the inner ring net, an adsorbent is arranged between the inner ring net and the outer ring net, the upper sealing plate and the lower sealing plate are respectively sealed with the upper inner wall and the lower inner wall of the tower body, the second connecting pipe is communicated with an annulus between the adsorption component and the tower body, and an exhaust pipe communicated with a central hole formed by enclosing of the inner ring net is arranged on the tower body. The utility model provides a problem that blast furnace gas wet flue gas desulfurization is inefficient, improved blast furnace gas treatment effeciency.
Description
Technical Field
The utility model belongs to the technical field of desulfurization system, concretely relates to blast furnace gas fine desulphurization processing system.
Background
In order to continuously improve the quality of environmental air and promote the emission reduction of atmospheric pollutants, the state puts forward higher requirements on the atmospheric pollutants in each region, and particularly fully executes the ultralow emission standard on steel enterprises. At present, the production lines of steel sintering, pelletizing and the like continuously realize ultralow emission, and the production lines of blast furnace gas, hot blast stoves, heating furnaces and the like just start to realize ultralow emission indexes. With the rapid development of energy conservation and emission reduction and circular economy of steel mills and the continuous enhancement of national environmental protection policies in recent years, the former terminal treatment is not more and more suitable for the environmental protection requirements under new situations, and the treatment measures such as production halt, production reduction, production limit and the like cannot be stably implemented up to the standard.
At present, blast furnace gas is one of main byproducts in the steel industry, under common conditions, besides the use of a blast furnace hot blast stove, a large amount of surplus is left, and if the blast furnace hot blast stove cannot be recycled, the blast furnace gas can only be discharged in a emptying way, so that energy waste and environmental pollution are caused, and therefore, a steel mill must be controlled from the source. The blast furnace gas is not only a low-calorific-value gas fuel, which is an important secondary energy source, but also typical toxic and harmful industrial waste gas, the utilization of the blast furnace gas is severely restricted by the presence of the sulfur in the blast furnace gas, and under the new trend, the clean utilization of the blast furnace gas after desulfurization is proposed all over the country, so that the treatment direction is clear.
At present, two common methods for removing organic sulfur in the market mainly comprise a wet method and a dry method, wherein the wet method is to convert organic sulfur into inorganic sulfur by passing blast furnace gas through a hydrolysis device, and then remove the inorganic sulfur by using a spray tower. A large amount of waste liquid can be generated in the wet desulphurization operation, when the fluctuation of the sulfur content in the coal gas is large, the use amount of the alkali liquor needs to be manually adjusted, the consumption amount of the alkali liquor is large, and the operation cost is high. The dry desulfurization is that the blast furnace gas is pressurized and then passes through a hydrolysis device to convert organic sulfur into inorganic sulfur, and then the inorganic sulfur is removed by using a dry desulfurizing agent. The dry desulfurization method has no waste liquid and solid waste, is environment-friendly and closed-loop, and the replaced desulfurizer can be used for sintering, coking and blast furnaces, and has moderate operation cost.
SUMMERY OF THE UTILITY MODEL
In order to realize the aim, the utility model provides a blast furnace gas fine desulfurization treatment system.
The utility model discloses a blast furnace gas fine desulfurization processing system's technical scheme is:
the blast furnace gas fine desulfurization treatment system comprises a heat exchanger, a hydrolysis tower and a desulfurization tower, wherein an air inlet pipe of the heat exchanger is connected with a blast furnace gas pipeline, a pressurizing fan is arranged on the blast furnace gas pipeline, an air outlet pipe of the heat exchanger is connected with an air inlet pipe of the hydrolysis tower through a first connecting pipe, an air outlet pipe of the hydrolysis tower is connected with an air inlet pipe of the desulfurization tower through a second connecting pipe, the desulfurization tower comprises a tower body, an adsorption component is arranged in the tower body, the adsorption component comprises an outer ring net and an inner ring net which are coaxially arranged, and an upper sealing plate and a lower sealing plate which are respectively and fixedly connected to the upper end and the lower end of the outer ring net and the inner ring net, an adsorbent is arranged between the inner ring net and the outer ring net, the upper sealing plate and the lower sealing plate are respectively sealed with the upper inner wall and the lower inner wall of the tower body, the second connecting pipe is communicated with an annulus between the adsorption component and the tower body, and an exhaust pipe communicated with a central hole formed by enclosing the inner ring net is arranged on the tower body.
As a further improvement to the above technical scheme, the tower body is of a columnar structure, the adsorption component and the tower body are coaxially arranged, and the exhaust pipe is fixedly connected to the center of the upper side of the tower body.
As a further improvement to the above technical solution, the upper sealing plate and the lower sealing plate are both of an annular structure, outer wall surfaces of the upper sealing plate and the lower sealing plate are coplanar with an outer wall of the outer ring network, and inner wall surfaces of the upper sealing plate and the lower sealing plate are coplanar with an inner wall of the inner ring network.
As a further improvement to the above technical scheme, the upper end fixedly connected with a plurality of filling tube of tower body, the filling tube with annular space intercommunication between interior looped netowrk and the outer looped netowrk, the upper end of filling tube is equipped with the tube cap, a plurality of the filling tube is followed go up the even interval arrangement of shrouding circumference.
As a further improvement to the technical scheme, the lower end of the tower body is fixedly connected with a plurality of discharging pipes, the discharging pipes are communicated with the annular space between the inner ring net and the outer ring net, pipe caps are arranged at the lower ends of the discharging pipes, and the plurality of discharging pipes are evenly arranged at intervals along the circumferential direction of the lower sealing plate.
As a further improvement on the technical scheme, the lower end of the tower body is fixedly connected with a drain pipe, the drain pipe is communicated with a central hole formed by the inner ring net in a surrounding mode, and the lower end of the drain pipe is fixedly connected with a sealing cover.
As a further improvement on the technical scheme, the feeding pipes of the desulfurization tower are three, and the three feeding pipes are arranged at intervals up and down.
As a further improvement to the technical scheme, the heat exchanger comprises a shell, a heat exchange coil is arranged in the shell, a liquid inlet and a liquid outlet of the heat exchange coil are connected with the cooling tower through a circulating pipe, and a circulating pump is arranged on the circulating pipe.
The utility model provides a blast furnace gas fine desulfurization processing system compares in prior art, and its beneficial effect lies in:
the utility model discloses a blast furnace gas fine desulfurization processing system when using, introduces processing system with unprocessed blast furnace gas, and booster fan carries out the pressure boost to blast furnace gas. The blast furnace gas after pressure rise enters a heat exchanger and is heated to over 70 ℃ by steam heat exchange. The blast furnace gas after temperature rise enters a hydrolysis tower, the temperature is 70 ℃, and catalytic reaction is carried out in the tower. The blast furnace gas after hydrolysis reaction enters a desulfurizing tower, and organic sulfur in the gas is effectively removed after catalytic reaction. The operation temperature of the desulfurizing tower is 60 ℃, the operation pressure is 16kPa, and the active carbon adsorbent is filled in the desulfurizing tower and is used for adsorbing sulfide components in blast furnace gas. And the purified blast furnace gas is obtained after passing through a desulfurization system. The active carbon with saturated adsorption is discharged through a discharge pipe below the desulfurizing tower and is conveyed to coking or sintering for use by a suction and discharge tank car. The blast furnace gas fine desulfurization treatment system of the utility model adopts a hydrolysis tower, the hydrolysis efficiency is ensured, the system resistance is effectively reduced, and the operation cost is saved; the special activated semi-coke is adopted, so that H can be removed 2 S, partial COS can be removed, and the desulfurization efficiency of the whole system is greatly improved; the special activated semi-coke is adopted, so that the cost is lower than that of other adsorbents. The utility model discloses a blast furnace gas fine desulfurization processing system has solved the problem that blast furnace gas wet flue gas desulfurization is inefficient, has improved blast furnace gas treatment effeciency. The utility model discloses a blast furnace gas fine desulfurization processing system does not produce the waste liquid, has avoided the secondary environmental protection problem that the waste liquid brought.
Drawings
FIG. 1 is a schematic structural diagram of a blast furnace gas fine desulfurization treatment system of the present invention;
FIG. 2 is a schematic view of the internal structure of a desulfurizing tower in the blast furnace gas fine desulfurization treatment system of the present invention;
FIG. 3 is an enlarged view at A in FIG. 2;
FIG. 4 is an enlarged view at B in FIG. 2;
in the figure: 1. a blast furnace gas pipeline; 2. a booster fan; 3. a heat exchanger; 4. a heat exchange coil; 5. a cooling tower; 6. a circulation pipe; 7. a circulation pump; 8. a first connecting pipe; 9. a hydrolysis tower; 10. a second connection pipe; 11. a desulfurizing tower; 12. a tower body; 13. an outer ring network; 14. an inner ring network; 15. an adsorbent; 16. an upper sealing plate; 17. a lower sealing plate; 18. an exhaust pipe; 19. a blow-off pipe; 20. a sealing cover; 21. a feed tube; 22. a tube cover; 23. discharging the material pipe; 24. and (4) a pipe cap.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments:
the utility model discloses a blast furnace gas fine desulphurization processing system's concrete embodiment, as shown in fig. 1 to 4, including heat exchanger 3, hydrolysis tower 9 and desulfurizing tower 11, heat exchanger 3's intake pipe and blast furnace gas pipeline 1 are connected, be equipped with booster fan 2 on the blast furnace gas pipeline 1, heat exchanger 3's outlet duct is through the intake-tube connection of first connecting pipe 8 with hydrolysis tower 9, hydrolysis tower 9's outlet duct passes through the intake-tube connection of second connecting pipe 10 with desulfurizing tower 11, desulfurizing tower 11 includes tower body 12, be equipped with adsorption component in the tower body 12, adsorption component includes outer looped netowrk 13 and interior looped netowrk 14 of coaxial arrangement and difference fixed connection at last shrouding 16 and lower shrouding 17 at outer looped netowrk 13 and the upper and lower both ends of interior looped netowrk 14, be equipped with adsorbent 15 between inner looped netowrk 14 and the outer looped netowrk 13, adsorbent 15 is the blue charcoal of activation. The upper sealing plate 16 and the lower sealing plate 17 are respectively sealed with the upper and lower inner walls of the tower body 12, the second connecting pipe 10 is communicated with the annular space between the adsorption component and the tower body 12, and the tower body 12 is provided with an exhaust pipe 18 communicated with a central hole enclosed by the inner ring net 14.
In this embodiment, the tower body 12 is a columnar structure, the adsorption component and the tower body 12 are coaxially arranged, and the exhaust pipe 18 is fixedly connected to the upper center of the tower body 12. The upper closing plate 16 and the lower closing plate 17 are both of annular structures, the outer wall surfaces of the upper closing plate 16 and the lower closing plate 17 are coplanar with the outer wall of the outer ring net 13, and the inner wall surfaces of the upper closing plate 16 and the lower closing plate 17 are coplanar with the inner wall of the inner ring net 14. The upper end fixedly connected with a plurality of filling tube 21 of tower body 12, annular space intercommunication between filling tube 21 and inner ring net 14 and the outer ring net 13, the upper end of filling tube 21 is equipped with tube cap 22, and a plurality of filling tube 21 is along 16 even interval arrangements of circumference of last shrouding.
In this embodiment, the lower end of the tower body 12 is fixedly connected with a plurality of discharging pipes 23, the discharging pipes 23 are communicated with the annular space between the inner ring network 14 and the outer ring network 13, pipe caps 24 are arranged at the lower ends of the discharging pipes 23, and the plurality of discharging pipes 23 are evenly arranged along the circumferential direction of the lower sealing plate 17 at intervals. The lower end of the tower body 12 is fixedly connected with a sewage discharge pipe 19, the sewage discharge pipe 19 is communicated with a central hole formed by the inner ring net 14, and the lower end of the sewage discharge pipe 19 is fixedly connected with a sealing cover 20. The feeding pipes of the desulfurizing tower 11 are three and are arranged at intervals up and down.
In this embodiment, the heat exchanger 3 includes a housing, a heat exchanging coil 4 is disposed in the housing, a liquid inlet and a liquid outlet of the heat exchanging coil 4 are connected to a cooling tower 5 through a circulating pipe 6, and the circulating pipe 6 is provided with a circulating pump 7.
The utility model discloses a blast furnace gas fine desulfurization processing system when using, introduces processing system with unprocessed blast furnace gas, and booster fan 2 carries out the pressure boost to blast furnace gas. The blast furnace gas after pressure rise enters a heat exchanger 3, and is heated to above 70 ℃ by steam heat exchange. The blast furnace gas after being heated enters a hydrolysis tower 9, the temperature is 70 ℃, and catalytic reaction is carried out in the tower. The blast furnace gas after hydrolysis reaction enters a desulfurizing tower 11, and organic sulfur in the gas is effectively removed after catalytic reaction. The operation temperature of the desulfurizing tower 11 is 60 ℃, the operation pressure is 16kPa, and the active carbon adsorbent 15 is filled in the desulfurizing tower and used for adsorbing sulfide components in blast furnace gas. And (4) obtaining purified blast furnace gas after passing through a desulfurization system. The activated carbon with saturated adsorption is discharged through a discharge pipe 23 below the desulfurizing tower 11 and is conveyed to coking or sintering for use by a suction and discharge tank car. The blast furnace gas fine desulfurization treatment system adopts the hydrolysis tower 9, so that the hydrolysis efficiency is ensured, the system resistance is effectively reduced, and the operation cost is saved;the special activated semi-coke is adopted, so that H can be removed 2 S, partial COS can be removed, and the desulfurization efficiency of the whole system is greatly improved; the special activated semi-coke is adopted, so that the cost is lower than that of other adsorbents 15, and the operation is lower. The utility model discloses a blast furnace gas fine desulphurization processing system has solved the problem of blast furnace gas wet flue gas desulfurization inefficiency, has improved blast furnace gas treatment effeciency. The utility model discloses a blast furnace gas fine desulfurization processing system does not produce the waste liquid, has avoided the secondary environmental protection problem that the waste liquid brought.
One set of the utility model discloses a blast furnace gas fine desulfurization processing system can solve ten heating furnace flue gas SO systematically 2 The emission is ultra-low, and the engineering investment is reduced. The utility model discloses a blast furnace gas fine desulfurization processing system lies in beyond the construction control area, has avoided the archaeology pressure that brings at the many sets of terminal processing apparatus of general archaeology district construction. The utility model discloses a blast furnace gas fine desulfurization processing system avoids the problem of blast furnace gas wet flue gas desulfurization inefficiency, improves hydrolysis, adsorption efficiency. The utility model discloses a blast furnace gas fine desulphurization processing system avoids waste liquid, the useless secondary environmental protection problem that brings of solid waste production. The blast furnace gas fine desulfurization treatment system of the utility model avoids the overhigh investment and operation cost, and especially the operation cost is moderate.
The blast furnace gas fine desulfurization treatment system effectively solves the problem of flue gas SO of blast furnace gas users 2 The ultra-low emission problem, the project investment is saved by about 2/3 compared with the terminal treatment technology. The hydrolysis tower adopts a special hydrolysis agent and a horizontal structure, so that the hydrolysis efficiency is ensured, the system resistance is effectively reduced, and the operation cost is saved. The desulfurizing tower adopts special activated semi-coke which can remove H 2 S, partial COS can be removed, and the desulfurization efficiency of the whole system is greatly improved; in addition, the adsorbent adopts special activated semi-coke, and the cost is lower than that of other adsorbents. The utility model discloses an in the blast furnace gas fine desulfurization processing system use, whole no waste liquid, the useless production admittedly have avoided the secondary environmental protection problem that it brought. Gas is taken from a low-pressure gas pipe network, partial impurities are taken away by condensate along the line, the phenomenon of moderate degree of the hydrolytic agent caused by the impurities is reduced, and the service life of the hydrolytic agent is effectively prolonged.
The sulfur in blast furnace gas can be divided into two main types of organic sulfur and inorganic sulfur, and the main components of the organic sulfur are as follows: carbonyl sulfide (COS), carbon disulfide (CS 2), thioether mercaptan and the like, wherein the content is 150 to 180mg/Nm & lt 3 > the main component of the inorganic sulfur is H2S, and the content is 30 to 50mg/Nm3. The blast furnace gas desulfurization process mainly comprises wet desulfurization and dry desulfurization, wherein the wet desulfurization is to convert organic sulfur into inorganic sulfur by passing the blast furnace gas through a hydrolysis device, and then remove the inorganic sulfur by utilizing a spray tower. A large amount of waste liquid can be generated in the wet desulphurization operation, when the fluctuation of the sulfur content in the coal gas is large, the use amount of the alkali liquor needs to be manually adjusted, the consumption amount of the alkali liquor is large, and the operation cost is high. The dry desulfurization is that the blast furnace gas is pressurized and then passes through a hydrolysis device to convert organic sulfur into inorganic sulfur, and then the inorganic sulfur is removed by using a dry desulfurizing agent. The utility model discloses a desulfurizing tower among the blast furnace gas fine desulfurization processing system adopts the fixed bed structure, has realized dry process desulfurization, does not have waste liquid, the solid useless production, and the environmental protection closed loop, the desulfurizer that the replacement got off can be used to sintering, coking, blast furnace and use, and the running cost is moderate.
The above description is only for the preferred embodiment of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The blast furnace gas fine desulfurization treatment system is characterized by comprising a heat exchanger, a hydrolysis tower and a desulfurization tower, wherein an air inlet pipe of the heat exchanger is connected with a blast furnace gas pipeline, a pressurizing fan is arranged on the blast furnace gas pipeline, an air outlet pipe of the heat exchanger is connected with an air inlet pipe of the hydrolysis tower through a first connecting pipe, an air outlet pipe of the hydrolysis tower is connected with an air inlet pipe of the desulfurization tower through a second connecting pipe, the desulfurization tower comprises a tower body, an adsorption component is arranged in the tower body, the adsorption component comprises an outer ring net and an inner ring net which are coaxially arranged, and an upper sealing plate and a lower sealing plate which are fixedly connected to the upper end and the lower end of the outer ring net and are respectively arranged, an adsorbent is arranged between the inner ring net and the outer ring net, the upper sealing plate and the lower sealing plate are respectively sealed with the upper inner wall and the lower inner wall of the tower body, the second connecting pipe is communicated with an annulus between the adsorption component and the tower body, and an exhaust pipe communicated with a central hole formed by encircling the inner ring net is arranged on the tower body.
2. The blast furnace gas fine desulfurization processing system according to claim 1, wherein the tower body is of a columnar structure, the adsorption assembly and the tower body are arranged coaxially, and the exhaust pipe is fixedly connected to the upper center of the tower body.
3. The blast furnace gas fine desulfurization processing system according to claim 2, wherein the upper and lower sealing plates are of an annular structure, the outer wall surfaces of the upper and lower sealing plates are coplanar with the outer wall of the outer ring net, and the inner wall surfaces of the upper and lower sealing plates are coplanar with the inner wall of the inner ring net.
4. The blast furnace gas fine desulfurization treatment system according to claim 3, wherein a plurality of feed pipes are fixedly connected to the upper end of the tower body, the feed pipes are communicated with an annular space between the inner ring net and the outer ring net, a pipe cover is arranged at the upper end of each feed pipe, and the feed pipes are uniformly arranged along the circumferential direction of the upper sealing plate at intervals.
5. The blast furnace gas fine desulfurization processing system according to claim 3, wherein a plurality of discharging pipes are fixedly connected to the lower end of the tower body, the discharging pipes are communicated with an annular space between the inner ring net and the outer ring net, pipe caps are arranged at the lower ends of the discharging pipes, and the plurality of discharging pipes are uniformly arranged along the circumferential direction of the lower sealing plate at intervals.
6. The blast furnace gas fine desulfurization treatment system according to claim 5, wherein a drain pipe is fixedly connected to the lower end of the tower body, the drain pipe is communicated with a central hole defined by the inner ring net, and a sealing cover is fixedly connected to the lower end of the drain pipe.
7. The blast furnace gas fine desulfurization processing system according to claim 1, wherein the number of the feed pipes of the desulfurization tower is three, and the three feed pipes are arranged at intervals up and down.
8. The blast furnace gas fine desulfurization treatment system according to claim 1, wherein the heat exchanger comprises a housing, a heat exchange coil is arranged in the housing, a liquid inlet and a liquid outlet of the heat exchange coil are connected with the cooling tower through a circulating pipe, and a circulating pump is arranged on the circulating pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221645491.1U CN217809274U (en) | 2022-06-29 | 2022-06-29 | Blast furnace gas fine desulfurization processing system |
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| CN202221645491.1U CN217809274U (en) | 2022-06-29 | 2022-06-29 | Blast furnace gas fine desulfurization processing system |
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| CN217809274U true CN217809274U (en) | 2022-11-15 |
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| CN202221645491.1U Active CN217809274U (en) | 2022-06-29 | 2022-06-29 | Blast furnace gas fine desulfurization processing system |
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