Water removal device for carbon dioxide metallurgy

Abstract

The invention belongs to the technical field of steel smelting, and particularly relates to a water removal device for carbon dioxide metallurgy. Comprising a pipe chain conveyor, an air inlet, an air outlet, a regeneration inlet and a regeneration outlet are formed in the pipe chain conveyor, the air inlet is communicated with an air inlet valve through a pipeline, the air outlet is connected with an air outlet valve and a pressure regulating valve in parallel through pipelines, a moisture detector is installed on the air outlet, the pressure regulating valve is communicated with the regeneration inlet through a pipeline and a heater, and a guide rail is arranged on the inner wall of the pipe chain conveyor. The pipe chain conveyor is provided with a plurality of material trays, the material trays are clamped on the guide rails, and baffles are inserted into the material trays. The utilization rate of the molecular sieves can be increased, the molecular sieves and gas flow reversely, so that full contact is achieved, the adsorption efficiency of the molecular sieves is improved, the molecular sieves do not need to be stacked in a high tower, and the molecular sieves at the bottom are prevented from being crushed.

Description

Technical Field

[0001] The invention belongs to the technical field of steel smelting, and in particular relates to a water removal device for carbon dioxide metallurgy. Background Art

[0002] The iron and steel smelting industry has always had environmental pollution problems, such as a large amount of carbon dioxide in the flue gas, which can cause air pollution if directly discharged. In response to this, the country has promoted the implementation of a low-carbon environmental protection policy. In order to achieve the requirements of low-carbon production, steel mills use the weak oxidizing property of carbon dioxide to recycle it for use in steel smelting production. For example, carbon dioxide can be sprayed in blast furnaces to control temperature, stir, cover and protect, and dilute. It can not only reduce carbon dioxide emissions, but also reduce production costs and improve the quality of molten steel. Carbon dioxide needs to be dehydrated before spraying, otherwise it will affect production indicators. At present, the dehydration device mostly uses an adsorption drying tower, which is generally two drying towers connected in parallel, one for dehydration and the other for regeneration. This method has the following shortcomings: the specifications of the two drying towers must meet the production needs at the same time, and both need to be filled with a sufficient number of adsorption fillers such as molecular sieves, and the dehydration time is long and the regeneration time is short, resulting in low utilization of the molecular sieve; the height of the drying tower is high, and the molecular sieve at the top will cause the molecular sieve at the bottom to break due to pressure. Summary of the invention

[0003] The object of the present invention is to provide a carbon dioxide metallurgical water removal device to solve the problems existing in the prior art.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A dewatering device for carbon dioxide metallurgy comprises a pipe chain conveyor, which is provided with an air inlet, an air outlet, a regeneration inlet and a regeneration outlet. The air inlet is connected to an air inlet valve through a pipeline, the air outlet is connected to an air outlet valve and a pressure regulating valve through a pipeline, a moisture detector is installed on the air outlet, the pressure regulating valve is connected to the regeneration inlet through a pipeline and a heater, a guide rail is arranged on the inner wall of the pipe chain conveyor, the pipe chain conveyor is provided with a plurality of material trays, the material trays are clamped on the guide rails, and baffles are inserted in the material trays.

[0006] Furthermore, the inner cavity of the tube chain conveyor is divided into a dewatering zone and a regeneration zone, the air inlet and the air outlet are respectively located at the two ends of the dewatering zone, the regeneration inlet and the regeneration outlet are respectively located at the two ends of the regeneration zone, the air inlet is close to the regeneration outlet, and the air outlet is close to the regeneration inlet.

[0007] Furthermore, the guide rails include two limiting guide rails, two breathable guide rails, and two partition guide rails. The two limiting guide rails are respectively located on two opposite sides of the inner wall of the tube chain conveyor, and the breathable guide rail and the partition guide rail are respectively located on the other two opposite sides of the inner wall of the tube chain conveyor. The limiting guide rails are closed at both ends following the shape of the tube chain conveyor. The two breathable guide rails are respectively located in the dewatering zone and the regeneration zone, and the two partition guide rails are respectively located at two connecting points of the dewatering zone and the regeneration zone.

[0008] Furthermore, the length of the partition guide rail is greater than the distance between the material trays, and the distance between the ends of the two air-permeable guide rails is greater than the length of the partition guide rail.

[0009] Furthermore, the air inlet and the regeneration outlet are respectively located on the tube chain conveyor at both ends of the partition guide rail, and the air outlet and the regeneration inlet are respectively located on the tube chain conveyor at both ends of another partition guide rail.

[0010] Furthermore, the material tray is provided with several rows of air holes that pass through the material tray, screens are fixed on both sides of the material tray, four grooves are distributed in a circular array on the outer edge of the material tray, the material tray is connected to the guide rail through the grooves, and a slot that passes through the material tray is opened on the side of the material tray.

[0011] Furthermore, the baffle is inserted into the slot, the length of the baffle is the vertical distance between the ventilation guide rail and the partition guide rail, the width of the baffle is the width of the slot, and a plurality of stop strips are provided in the baffle, the width of the stop strips is greater than the diameter of the ventilation hole, and the center distance between the stop strips is the center distance between each column of the ventilation holes.

[0012] Furthermore, a screen plate is fixed at the connection point between the pipeline and the pipe chain conveyor.

[0013] The present invention has the following beneficial effects:

[0014] 1. The present invention can improve the utilization rate of molecular sieves and make the molecular sieves and gases flow in the opposite direction, thereby achieving sufficient contact and improving the adsorption efficiency of the molecular sieves. The molecular sieves do not need to be stacked in a high tower to prevent the molecular sieves at the bottom from being crushed.

[0015] 2. The partition rail between the air inlet and the regeneration inlet is clamped in the groove of the material tray. The partition rail pushes the baffle to one side, and the stop bar covers the air hole, thereby isolating the gas flow between the dewatering area and the regeneration area.

[0016] 3. The air-permeable guide rail is clamped in the groove of the material tray, and the air-permeable guide rail pushes the baffle to the other side. The stopper strip is located between the air holes, so that the gas can pass through the air holes smoothly.

[0017] 4. The tube chain conveyor can be set horizontally, and the molecular sieve is at a low height, reducing the risk of being crushed.

[0018] 5. Compared with the adsorption drying tower in the prior art, when you want to replace the molecular sieve, you need to release all the molecular sieves in the tower, which is a large workload. The present invention can release part of the molecular sieve for replacement, reducing the workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the tube chain conveyor at the air inlet and the regeneration inlet of the present invention.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the pipe chain conveyor at the gas outlet and the regeneration outlet of the present invention.

[0022] Figure 4 It is a schematic diagram of the disassembled structure of the material tray of the present invention.

[0023] Figure 5 It is a structural schematic diagram of the material tray of the present invention when it is clamped with the air-permeable guide rail.

[0024] Figure 6 It is a structural schematic diagram of the material tray of the present invention when it is clamped with the partition guide rail.

[0025] Among them: 1. Tube chain conveyor; 2. Air inlet; 3. Air outlet; 4. Regeneration inlet; 5. Regeneration outlet; 6. Air inlet valve; 7. Air outlet valve; 8. Pressure regulating valve; 9. Heater; 10. Moisture detector; 11. Material tray; 12. Baffle; 13. Dewatering area; 14. Regeneration area; 15. Limiting guide rail; 16. Breathable guide rail; 17. Partition guide rail; 18. Air vent; 19. Screen; 20. Groove; 21. Slot; 22. Screen plate; 23. Pipe; 24. Stop strip. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figure 1-6As shown, a dewatering device for carbon dioxide metallurgy includes a pipe chain conveyor 1, which is provided with an air inlet 2, an air outlet 3, a regeneration inlet 4, and a regeneration outlet 5. The air inlet 2 is connected to an air inlet valve 6 through a pipeline 23, and the air outlet 3 is connected to an air outlet valve 7 and a pressure regulating valve 8 through a pipeline 23. A moisture detector 10 is installed on the air outlet 3, and the pressure regulating valve 8 is connected to the regeneration inlet 4 through a pipeline 23 and a heater 9. A guide rail is provided on the inner wall of the pipe chain conveyor 1, and the pipe chain conveyor 1 is provided with a plurality of material trays 11, which are clamped on the guide rail, and a baffle 12 is inserted in the material tray 11. The pipe chain conveyor 1 is a prior art, and its specific structure is not repeated.

[0028] The inner cavity of the tube chain conveyor 1 is divided into a dewatering zone 13 and a regeneration zone 14. The air inlet 2 and the air outlet 3 are respectively located at the two ends of the dewatering zone 13, and the regeneration inlet 4 and the regeneration outlet 5 are respectively located at the two ends of the regeneration zone 14. The air inlet 2 is close to the regeneration outlet 5, and the air outlet 3 is close to the regeneration inlet 4.

[0029] The guide rails include two limit rails 15, two air-permeable rails 16, and two partition rails 17. The two limit rails 15 are respectively located on two opposite sides of the inner wall of the tube chain conveyor 1, and the air-permeable rails 16 and the partition rails 17 are respectively located on the other two opposite sides of the inner wall of the tube chain conveyor 1. The limit rails 15 are closed end to end following the shape of the tube chain conveyor 1. The two air-permeable rails 16 are respectively located in the dewatering area 13 and the regeneration area 14, and the two partition rails 17 are respectively located at two connecting points of the dewatering area 13 and the regeneration area 14. The limit rails 15 are used to make the material tray 11 slide along them, the air-permeable rails 16 make the material tray 11 breathable, and the partition rails 17 make the material tray 11 prevent gas from passing.

[0030] The length of the partition rail 17 is greater than the distance between the material trays 11, so that at least one material tray 11 is located at the partition rail 17, thereby playing a role in isolating the gas. The distance between the ends of the two air-permeable rails 16 is greater than the length of the partition rail 17, so that the air-permeable rail 16 and the partition rail 17 are spaced apart. When the material tray 11 slides from the air-permeable rail 16 to the partition rail 17, the air-permeable and partition states of the material tray 11 are switched.

[0031] The air inlet 2 and the regeneration outlet 5 are respectively located on the tube chain conveyor 1 at both ends of the partition guide rail 17 , and the air outlet 3 and the regeneration inlet 4 are respectively located on the tube chain conveyor 1 at both ends of the other partition guide rail 17 .

[0032] The tray 11 is provided with a plurality of rows of air holes 18 penetrating the tray 11 for gas to pass through. Screens 19 are fixed on both sides of the tray 11 for blocking the molecular sieve. Four grooves 20 are arranged in a circular array on the outer edge of the tray 11. The tray 11 is connected to the guide rail through the grooves 20. A slot 21 penetrating the tray 11 is provided on the side of the tray 11 for plugging the baffle 12.

[0033] The baffle 12 is inserted into the slot 21, the length of the baffle 12 is the vertical distance between the ventilation rail 16 and the partition rail 17, the width of the baffle 12 is the width of the slot 21, and a plurality of strip-shaped stop bars 24 are provided in the baffle 12, the width of the stop bars 24 is greater than the diameter of the ventilation hole 18, so that the ventilation hole 18 can be covered. The center distance between the stop bars 24 is the center distance between each column of the ventilation hole 18.

[0034] A sieve plate 22 is fixed at the connection point between the pipeline 23 and the tube chain conveyor 1 to block the molecular sieve.

[0035] The working principle of the present invention is:

[0036] When in use, the molecular sieve is filled into the tube chain conveyor 1 and sealed. When filling, an opening can be made on the tube chain conveyor 1, and several studs are welded around the opening, the tube chain conveyor 1 is opened for circulation, and the molecular sieve is added from the opening. After filling, a sealing gasket and a cover plate are connected to the studs, and then the nuts are connected to the studs and tightened to seal the tube chain conveyor 1. It is also possible to release part of the molecular sieve through the opening for replacement, while in the adsorption drying tower in the prior art, when the molecular sieve is to be replaced, all the molecular sieves in the tower need to be released, which is a large workload.

[0037] After the molecular sieve is installed, the pipe chain conveyor 1 and the pressure regulating valve 8 are opened, and the gas enters the pipe chain conveyor 1, and passes through the gas outlet 3, the pressure regulating valve 8, the regeneration inlet 4, and the regeneration outlet 5, thereby pushing out the air in the pipe chain conveyor 1. The operation mode of the pipe chain conveyor 1 is controlled and changed to intermittent operation, the gas outlet valve 7 and the heater 9 are opened, and the pressure regulating valve 8 is adjusted. The gas enters the pipe chain conveyor 1, and the moisture in the gas is adsorbed by the molecular sieve. The dry gas is divided into two parts, one part is discharged from the gas outlet valve 7 to the storage tank, and the other part is transported to the regeneration inlet 4 after decompression and heating, and the molecular sieve filler in the regeneration area 14 is regenerated and discharged from the regeneration outlet 5, thereby taking out the moisture in the molecular sieve.

[0038] The moisture detector 10 monitors the moisture content of the gas online. When the moisture content rises to a set value, it indicates that the molecular sieve at one end of the dehydration zone 13 is close to failure. The tube chain conveyor 1 runs intermittently once to transport the failed molecular sieve in the dehydration zone 13 to the regeneration zone 14 for regeneration, and a part of the regenerated molecular sieve in the regeneration zone 14 is also transported to the dehydration zone 13. The running direction of the molecular sieve is opposite to the flow direction of the gas, and this is repeated to form a circulating operation of the molecular sieve.

[0039] When the gas enters the tube chain conveyor 1 from the gas inlet 2, Figure 6As shown, the partition rail 17 between the air inlet 2 and the regeneration inlet 4 is clamped in the groove 20 of the material tray 11, and the partition rail 17 pushes the baffle 12 to one side, and the stop bar 24 covers the air hole 18, so that the gas entering the tube chain conveyor 1 is isolated and the gas can only flow to the outlet 3. Similarly, the gas used to regenerate the molecular sieve is also isolated and can only flow from the regeneration inlet 4 to the regeneration outlet 5. Figure 5 As shown, when the air-permeable guide rail 16 is clamped in the groove 20 of the material tray 11 , the air-permeable guide rail 16 pushes the baffle 12 to move to the other side, and the stop strip 24 is located between the air holes 18 , so that the gas can pass through the air holes 18 smoothly.

[0040] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention should all fall within the scope of protection of the present invention.

[0041] The techniques, shapes, and structural parts not described in detail in the present invention are all well-known techniques.

Claims

1. A carbon dioxide metallurgical water removal device, characterized in that: It includes a tube chain conveyor, which is provided with an air inlet, an air outlet, a regeneration inlet and a regeneration outlet. The air inlet is connected to an air inlet valve through a pipeline, the air outlet is connected to an air outlet valve and a pressure regulating valve through a pipeline, a moisture detector is installed on the air outlet, the pressure regulating valve is connected to the regeneration inlet through a pipeline and a heater, a guide rail is provided on the inner wall of the tube chain conveyor, the tube chain conveyor is provided with a plurality of material trays, the material trays are clamped on the guide rails, and baffles are inserted in the material trays.

2. The carbon dioxide metallurgical water removal device according to claim 1, characterized in that: The inner cavity of the tube chain conveyor is divided into a dewatering zone and a regeneration zone. The air inlet and the air outlet are respectively located at the two ends of the dewatering zone, the regeneration inlet and the regeneration outlet are respectively located at the two ends of the regeneration zone, the air inlet is close to the regeneration outlet, and the air outlet is close to the regeneration inlet.

3. The carbon dioxide metallurgical water removal device according to claim 2, characterized in that: The guide rails include two limit guide rails, two air-permeable guide rails, and two partition guide rails. The two limit guide rails are respectively located on two opposite sides of the inner wall of the tube chain conveyor, and the air-permeable guide rail and the partition guide rail are respectively located on the other two opposite sides of the inner wall of the tube chain conveyor. The limit guide rails are closed at both ends following the shape of the tube chain conveyor. The two air-permeable guide rails are respectively located in the dewatering zone and the regeneration zone, and the two partition guide rails are respectively located at two connecting points of the dewatering zone and the regeneration zone.

4. The carbon dioxide metallurgical water removal device according to claim 3, characterized in that: The length of the partition guide rail is greater than the distance between the material trays, and the distance between the ends of the two air-permeable guide rails is greater than the length of the partition guide rail.

5. The carbon dioxide metallurgical water removal device according to claim 4, characterized in that: The air inlet and the regeneration outlet are respectively located on the tube chain conveyor at both ends of the partition guide rail, and the air outlet and the regeneration inlet are respectively located on the tube chain conveyor at both ends of the other partition guide rail.

6. The carbon dioxide metallurgical water removal device according to claim 3, characterized in that: The tray is provided with a plurality of rows of air holes penetrating the tray, screens are fixed on both sides of the tray, four grooves are distributed in a circular array on the outer edge of the tray, the tray is clamped on the guide rail through the grooves, and a slot penetrating the tray is provided on the side of the tray.

7. The carbon dioxide metallurgical water removal device according to claim 6, characterized in that: The baffle is inserted into the slot, the length of the baffle is the vertical distance between the ventilation rail and the partition rail, the width of the baffle is the width of the slot, and a plurality of strip-shaped stop strips are arranged in the baffle, the width of the stop strips is greater than the diameter of the ventilation hole, and the center distance between the stop strips is the center distance between each column of the ventilation hole.

8. The carbon dioxide metallurgical water removal device according to claim 1, characterized in that: A screen plate is fixed at the connection point between the pipeline and the pipe chain conveyor.

Images