Desulfurization device
By using desulfurization devices in metallurgical production, the desulfurization ash is decomposed into sulfur dioxide and calcium oxide, which solves the problem of restricted utilization of desulfurization ash, and achieves efficient utilization of resources and reduces carbon emissions.
Patent Information
- Application Number
- CN202420867891.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-04-24
AI Technical Summary
The lack of a device for removing sulfur elements from desulfurization ash in metallurgical production has led to the limitation of the utilization of desulfurization ash.
A desulfurization device is provided, including a rotary kiln, an air inlet pipe and a plurality of plasma torches. The desulfurization ash enters through the rotary kiln and decomposes into sulfur dioxide and calcium oxide under the action of the high-temperature gas jet of the plasma torch.
Through this device, the desulfurization ash can be effectively decomposed into sulfur dioxide and calcium oxide, which can be used as flux for sintering or pelleting processes, reducing carbon emissions and improving resource utilization.
Smart Images
Figure CN222855413U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of metallurgical technology, and specifically relates to a desulfurization device. Background Art
[0002] Desulfurization ash is produced in metallurgical production. Desulfurization ash is a slightly yellow solid dry powder mixture composed of desulfurization reaction products, incompletely reacted sulfur dioxide absorbent and flue fly ash. Desulfurization ash contains compounds such as calcium sulfite, calcium sulfate, calcium carbonate, calcium hydroxide, and calcium oxide. The content of CaSO3·1 / 2H2O is 10% to 50%, while the more stable CaSO4 accounts for a smaller proportion. Incompletely reacted calcium-based desulfurizers are generally f-CaO and Ca(OH)2. Due to the unstable properties of CaO, Ca(OH)2 and CaSO3, the utilization of desulfurization ash is severely restricted. During long-term stacking, CaO will slowly absorb water vapor in the air and continuously generate Ca(OH)2. The generated Ca(OH)2 and the original Ca(OH)2 continue to absorb CO2 in the air to form CaCO3, causing the desulfurization ash to agglomerate; and the CaSO3 in the desulfurization ash is easily oxidized to CaSO4 in the air, resulting in the destruction of the stability of the desulfurization ash.
[0003] In Europe and the United States, most of the desulfurized ash is directly used for backfilling in mines and construction industries. The United States uses desulfurized ash to produce gypsum wallboards, cement concrete, and for improving soil and stabilizing waste; Europe uses it for landfill, soil remediation, paving, cement and concrete.
[0004] In the domestic steel industry, desulfurized ash is mainly delivered to other manufacturers for processing, and is mainly used in gypsum board production and cement additives, etc. This method not only wastes resources, but also increases environmental protection costs.
[0005] Since desulfurized ash is a high-calcium and high-sulfur solid waste, after removing the sulfur element, the main mineral is calcium oxide, which is an essential flux for sintering and pelletizing. Therefore, desulfurized ash can be returned to the sintering or pelletizing process as a flux after desulfurization. Since the amount of carbon dioxide emitted by calcium oxide production accounts for about 7% to 11% of the total carbon emissions of long-process steel enterprises, using desulfurized ash instead of flux can significantly reduce the carbon emissions of enterprises.
[0006] However, the related art lacks a device for removing sulfur from desulfurized ash, so as to decompose the desulfurized ash produced in metallurgical production into calcium oxide, thereby being used as a flux in sintering or pelletizing processes. Utility Model Content
[0007] The present application aims to at least to some extent solve the technical problem of the lack of a device for removing sulfur from desulfurized ash in the related art. To this end, the present application provides a desulfurization device.
[0008] The technical solution of this application is:
[0009] The present application provides a desulfurization device, comprising:
[0010] A rotary kiln having a feed inlet, a discharge inlet, an air inlet and an air outlet;
[0011] An air inlet pipe is arranged in the rotary kiln along the axial direction of the rotary kiln, and the inlet of the air inlet pipe is communicated with the air inlet of the rotary kiln;
[0012] A plurality of plasma torches are arranged at intervals on the air inlet pipe along the axial direction of the air inlet pipe, and the nozzles of the plurality of plasma torches are all directed toward the bottom of the rotary kiln.
[0013] In some embodiments, the distance between the nozzle of the plasma torch and the bottom of the rotary kiln is 35 cm to 45 cm.
[0014] In some embodiments, the plurality of plasma torches are arranged vertically.
[0015] In some embodiments, the rotary kiln has opposing first and second ends;
[0016] The feed port and the air outlet of the rotary kiln are arranged at the first end of the rotary kiln, and the discharge port and the air inlet of the rotary kiln are arranged at the second end of the rotary kiln.
[0017] In some embodiments, the rotary kiln is tilted, and the first end of the rotary kiln is higher than the second end.
[0018] In some embodiments, two ends of the air inlet pipe are respectively fixed to two ends of the rotary kiln, and one end of the air inlet pipe provided with an inlet is passed through the second end of the rotary kiln.
[0019] In some embodiments, both ends of the rotary kiln are sealing flanges, one end of the air inlet pipe with an inlet is passed through the sealing flange at the second end of the rotary kiln, and the other end of the air inlet pipe is fixedly connected to the sealing flange at the first end of the rotary kiln.
[0020] In some embodiments, the desulfurization device further comprises a screw feeder, and a discharge port of the screw feeder is connected to a feed port of the rotary kiln.
[0021] In some embodiments, the desulfurization device further comprises a driving motor, and the driving motor is meshed with the rotary kiln through a gear mechanism.
[0022] In some embodiments, the desulfurization device further includes a gas outlet pipe, and an inlet of the gas outlet pipe is connected to a gas outlet of the rotary kiln.
[0023] The embodiments of the present application have at least the following beneficial effects:
[0024] The desulfurization device proposed in the present application, when in operation, desulfurization ash enters the rotary kiln through the feed port of the rotary kiln, and the rotation of the rotary kiln can make the desulfurization ash more evenly dispersed in the rotary kiln, and under the action of gravity, the desulfurization ash can be kept distributed at the bottom of the rotary kiln. The plasma torch is arranged in the rotary kiln, and the air inlet of the rotary kiln is used to provide a gas source to the plasma torch, so that the high-temperature gas jet ejected by the plasma torch acts on the desulfurization ash to decompose the desulfurization ash into sulfur dioxide and calcium oxide. After the desulfurization ash is decomposed into sulfur dioxide and calcium oxide, the sulfur dioxide gas is discharged from the gas outlet of the rotary kiln, and the calcium oxide is discharged from the discharge port of the rotary kiln.
[0025] In order to ensure the effect of the plasma torch on the desulfurized ash, multiple plasma torches are arranged in the rotary kiln. In order to arrange multiple plasma torches in the rotary kiln, an air inlet pipe is arranged in the rotary kiln, and the inlet of the air inlet pipe is connected to the air inlet of the rotary kiln. In this way, the gas source of the plasma torch enters from the air inlet of the rotary kiln, then enters the air inlet pipe through the inlet of the air inlet pipe, and finally enters each plasma torch.
[0026] In the rotary kiln, the desulfurized ash is distributed at the bottom of the rotary kiln along the axial direction of the rotary kiln. In order to allow multiple plasma torches to act evenly on the desulfurized ash, the air inlet pipe is arranged along the axial direction of the rotary kiln, so that the multiple plasma torches are arranged at intervals along the axial direction of the air inlet pipe. Multiple outlets are arranged on the circumferential surface of the air inlet pipe along the axial direction of the air inlet pipe, and the multiple outlets of the air inlet pipe correspond to the multiple plasma torches one by one. The outlet of the air inlet pipe is connected to the air inlet of the plasma torch to pass the gas source in the air inlet pipe into the plasma torch. At the same time, the nozzles of the multiple plasma torches are all facing the bottom of the rotary kiln, so that the high-temperature gas jets ejected by the multiple plasma torches can directly act on the desulfurized ash. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 This is a schematic diagram of the structure of the desulfurization device according to an embodiment of the present application.
[0029] Reference numerals:
[0030] 10. Desulfurization device; 100. Rotary kiln; 200. Air inlet pipe; 300. Plasma torch; 400. Screw feeder; 500. Drive motor; 600. Gear mechanism; 700. Air outlet pipe; 800. Hopper; 900. Sealing flange. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0032] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.
[0033] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0034] Figure 1 This is a schematic diagram of the structure of a desulfurization device 10 according to an embodiment of the present application, Figure 1 The desulfurization device 10 includes a rotary kiln 100, an air inlet pipe 200 and a plasma torch 300. The rotary kiln 100 has a feed port, a discharge port, an air inlet and an air outlet. The air inlet pipe 200 is arranged in the rotary kiln 100 along the axial direction of the rotary kiln 100. The inlet of the air inlet pipe 200 is connected to the air inlet of the rotary kiln 100. A plurality of plasma torches 300 are provided. The plurality of plasma torches 300 are arranged in the air inlet pipe 200 at intervals along the axial direction of the air inlet pipe. The nozzles of the plurality of plasma torches 300 are all facing the bottom of the rotary kiln 100.
[0035] Specifically, when the desulfurization device 10 is in operation, the desulfurization ash enters the rotary kiln 100 through the feed port of the rotary kiln 100. The rotation of the rotary kiln 100 can make the desulfurization ash dispersed more evenly in the rotary kiln 100. At the same time, under the action of gravity, the desulfurization ash can be kept distributed at the bottom of the rotary kiln 100. The plasma torch 300 is arranged in the rotary kiln 100. The air inlet of the rotary kiln 100 is used to provide a gas source to the plasma torch 300, so that the high-temperature gas jet ejected by the plasma torch 300 acts on the desulfurization ash to decompose the desulfurization ash into sulfur dioxide and calcium oxide. After the desulfurization ash is decomposed into sulfur dioxide and calcium oxide, the sulfur dioxide gas is discharged from the air outlet of the rotary kiln 100, and the calcium oxide is discharged from the discharge port of the rotary kiln 100.
[0036] In order to ensure the effect of the plasma torch 300 on the desulfurized ash, a plurality of plasma torches 300 are arranged in the rotary kiln 100. In order to arrange the plurality of plasma torches 300 in the rotary kiln 100, an air inlet pipe 200 is arranged in the rotary kiln 100, and the inlet of the air inlet pipe 200 is connected to the air inlet of the rotary kiln 100, and the plurality of plasma torches 300 enter the air inlet pipe 200. In this way, the gas source of the plasma torch 300 enters from the air inlet of the rotary kiln 100, then enters the air inlet pipe 200 through the inlet of the air inlet pipe 200, and finally enters each plasma torch 300.
[0037] In the rotary kiln 100, the desulfurized ash is distributed at the bottom of the rotary kiln 100 along the axial direction of the rotary kiln 100. In order to make the multiple plasma torches 300 act evenly on the desulfurized ash, the air inlet pipe 200 is arranged along the axial direction of the rotary kiln 100, so that the multiple plasma torches 300 are arranged at intervals along the axial direction of the air inlet pipe. A plurality of outlets are arranged on the circumferential surface of the air inlet pipe 200 along the axial direction of the air inlet pipe 200, and the multiple outlets of the air inlet pipe 200 correspond to the multiple plasma torches 300 one by one. The outlet of the air inlet pipe 200 is connected with the air inlet of the plasma torch 300 to pass the gas source in the air inlet pipe 200 into the plasma torch 300. At the same time, the nozzles of the multiple plasma torches 300 are all facing the bottom of the rotary kiln 100, so that the high-temperature gas jets ejected by the multiple plasma torches 300 can directly act on the desulfurized ash.
[0038] In some embodiments, in order to ensure the effect of the plasma torch 300 on the desulfurized ash, it is usually necessary to use compressed air as the gas source of the plasma torch 300, and the temperature of the high-temperature gas jet ejected by the plasma torch 300 is about 2000° C. The desulfurized ash can be well decomposed into sulfur dioxide and calcium oxide at about 2000° C.
[0039] In some embodiments, the distance between the nozzle of the plasma torch 300 and the bottom of the rotary kiln 100 is 35 cm to 45 cm. By setting the distance between the nozzle of the plasma torch 300 and the desulfurized ash at the bottom of the rotary kiln 100, the effect of the high-temperature gas jet ejected by the plasma torch 300 on the desulfurized ash is ensured.
[0040] In some embodiments, Figure 1 As shown, the plurality of plasma torches 300 are arranged vertically, so that the nozzles of the plasma torches 300 are arranged toward the bottom of the rotary kiln 100 .
[0041] In some embodiments, Figure 1As shown, the rotary kiln 100 has a first end and a second end opposite to each other, the feed port and the gas outlet of the rotary kiln 100 are arranged at the first end of the rotary kiln 100, and the discharge port and the gas inlet of the rotary kiln 100 are arranged at the second end of the rotary kiln 100. When the desulfurization device 10 is in operation, the desulfurized ash enters the rotary kiln 100 through the feed port of the rotary kiln 100, the decomposed calcium oxide is discharged from the discharge port of the rotary kiln 100, and the sulfur dioxide gas is discharged from the gas outlet of the rotary kiln 100. In order to make the desulfurized ash in the rotary kiln 100 decompose more fully, the logistics conveying direction of the rotary kiln 100 is arranged opposite to the gas flow direction of the rotary kiln 100.
[0042] In some embodiments, Figure 1 As shown, the rotary kiln 100 is tilted, and the first end of the rotary kiln 100 is higher than the second end. The desulfurization ash in the rotary kiln 100 can move from the first end to the second end of the rotary kiln 100 under the action of gravity. That is, the desulfurization ash can move from the feed port to the discharge port of the rotary kiln 100 under the action of gravity and the rotation of the rotary kiln 100, and decomposes during the movement, thereby ensuring the continuous working effect of the desulfurization device 10.
[0043] In some embodiments, Figure 1 As shown, both ends of the air inlet pipe 200 are respectively fixed to both ends of the rotary kiln 100, and one end of the air inlet pipe 200 with an inlet is passed through the second end of the rotary kiln 100. The air inlet pipe 200 is fixed by the rotary kiln 100, so that the air inlet pipe 200 can provide a gas source for the multiple plasma torches 300 and fix the multiple plasma torches 300. In addition, one end of the air inlet pipe 200 with an inlet is passed through the second end of the rotary kiln 100. In this case, the inlet of the air inlet pipe 200 is the air inlet of the rotary kiln 100.
[0044] In some embodiments, Figure 1 As shown, the two ends of the rotary kiln 100 are sealed flanges 900, one end of the air inlet pipe 200 with an inlet is penetrated through the sealing flange 900 located at the second end of the rotary kiln 100, and the other end of the air inlet pipe 200 is fixedly connected to the sealing flange 900 located at the first end of the rotary kiln 100. The main body of the rotary kiln 100 is cylindrical, and the sealing flanges 900 are arranged at the two ends of the rotary kiln 100 to achieve the sealing setting of the rotary kiln 100. Therefore, the air inlet pipe 200 can be fixed by the sealing flanges 900 at the two ends of the rotary kiln 100, so that the one end of the air inlet pipe 200 with an inlet is penetrated through the sealing flange 900 located at the second end of the rotary kiln 100, and the other end of the air inlet pipe 200 is fixedly connected to the sealing flange 900 located at the first end of the rotary kiln 100.
[0045] In addition, the feed port and the gas outlet of the rotary kiln 100 are arranged at a sealing flange 900 located at a first end of the rotary kiln 100 , the feed port of the rotary kiln 100 is lower than the gas outlet, and the discharge port of the rotary kiln 100 is arranged at the bottom of the main body of the rotary kiln 100 .
[0046] In some embodiments, Figure 1 As shown, the desulfurization device 10 further includes a screw feeder 400 , and the discharge port of the screw feeder 400 is connected to the feed port of the rotary kiln 100 , so that the desulfurization ash can be transported into the rotary kiln 100 through the screw feeder 400 .
[0047] In some embodiments, Figure 1 As shown, the desulfurization device 10 further includes a driving motor 500, and the driving motor 500 and the rotary kiln 100 are meshed and transmitted through a gear mechanism 600. The driving motor 500 drives the rotary kiln 100 to rotate through the gear mechanism 600. A gear is provided on the output shaft of the driving motor 500, and an external gear is provided on the outer peripheral surface of the rotary kiln 100. The gear on the output shaft of the driving motor 500 is meshed and connected with the external gear on the outer peripheral surface of the rotary kiln 100 to form the gear mechanism 600.
[0048] In some embodiments, Figure 1 As shown, the desulfurization device 10 further includes an outlet pipe 700, the inlet of which is connected to the outlet of the rotary kiln 100. The sulfur dioxide gas discharged from the desulfurization device 10 is usually used in an acid-making system for acid-making, and the sulfur dioxide gas discharged from the outlet of the rotary kiln 100 is transported to the acid-making system through the outlet pipe 700.
[0049] In some embodiments, Figure 1 As shown, the desulfurization device 10 further includes a hopper 800 , the inlet of which is connected to the discharge port of the rotary kiln 100 , so that the calcium oxide produced by the desulfurization device 10 can be collected through the hopper 800 .
[0050] In some embodiments, the diameter of the rotary kiln 100 is about 2 meters and the length is about 10 meters. Correspondingly, the air inlet of the rotary kiln 100 is about 30 cm away from the top of the rotary kiln 100, and the diameter of the air inlet (air inlet pipe 200) of the rotary kiln 100 is about 25 cm. Four plasma torches 300 are provided in the rotary kiln 100, and the distance between two adjacent plasma torches 300 is about 2 m. The length of the plasma torch 300 is about 1.2 m and the diameter is about 10 cm. The air outlet of the rotary kiln 100 is located at the center of the rotary kiln 100, and the diameter of the air outlet of the rotary kiln 100 is about 60 cm. The feed port of the rotary kiln 100 is about 35 cm away from the bottom of the rotary kiln 100. The discharge port of the rotary kiln 100 is arranged at the bottom of the circumference of the rotary kiln 100.
[0051] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0053] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0054] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0055] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0056] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.
[0057] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0058] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.
Claims
1. A desulfurization device, characterized in that: include: A rotary kiln having a feed inlet, a discharge inlet, an air inlet and an air outlet; An air inlet pipe is arranged in the rotary kiln along the axial direction of the rotary kiln, and the inlet of the air inlet pipe is communicated with the air inlet of the rotary kiln; A plurality of plasma torches are arranged at intervals on the air inlet pipe along the axial direction of the air inlet pipe, and the nozzles of the plurality of plasma torches are all directed toward the bottom of the rotary kiln.
2. The desulfurization device according to claim 1, characterized in that: The distance between the nozzle of the plasma torch and the bottom of the rotary kiln is 35 cm to 45 cm.
3. The desulfurization device according to claim 2, characterized in that: The multiple plasma torches are all arranged vertically.
4. The desulfurization device according to any one of claims 1 to 3, characterized in that: The rotary kiln has opposing first and second ends; The feed port and the air outlet of the rotary kiln are arranged at the first end of the rotary kiln, and the discharge port and the air inlet of the rotary kiln are arranged at the second end of the rotary kiln.
5. The desulfurization device according to claim 4, characterized in that: The rotary kiln is arranged tilted, and the first end of the rotary kiln is higher than the second end.
6. The desulfurization device according to claim 4, characterized in that: The two ends of the air inlet pipe are respectively fixed to the two ends of the rotary kiln, and one end of the air inlet pipe provided with an inlet is penetrated through the second end of the rotary kiln.
7. The desulfurization device according to claim 6, characterized in that: The two ends of the rotary kiln are sealing flanges, one end of the air inlet pipe with an inlet is penetrated by the sealing flange at the second end of the rotary kiln, and the other end of the air inlet pipe is fixedly connected to the sealing flange at the first end of the rotary kiln.
8. The desulfurization device according to any one of claims 1 to 3, characterized in that: The desulfurization device further comprises a screw feeder, and a discharge port of the screw feeder is connected to a feed port of the rotary kiln.
9. The desulfurization device according to any one of claims 1 to 3, characterized in that: The desulfurization device also includes a driving motor, and the driving motor is meshed with the rotary kiln through a gear mechanism.
10. The desulfurization device according to any one of claims 1 to 3, characterized in that: The desulfurization device further comprises an air outlet pipe, the inlet of which is communicated with the air outlet of the rotary kiln.