A desulfurizer delivery device
By using a variable frequency screw feeder and nitrogen injection technology, the problem of insufficient flexibility in the desulfurizing agent conveying device has been solved, enabling precise adjustment and efficient conveying of the desulfurizing agent supply, and meeting the environmental protection requirements under different working conditions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING SHOUGANG INT ENG TECH
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-07
AI Technical Summary
Existing technologies have low flexibility in desulfurizing agent delivery, making it difficult to control the supply and adapt to changes in flue gas volume and SO2 concentration under different operating conditions, thus making it difficult to meet environmental protection requirements.
The supply of desulfurizing agent is adjusted by using a variable frequency screw feeder. The rotation speed of the screw device is controlled by the change of motor frequency. Combined with the use of nitrogen injection and transmitter, the precise quantitative delivery of desulfurizing agent is achieved.
It improves the flexibility of desulfurizer delivery, adapts to changes in flue gas volume and SO2 concentration under different operating conditions, enhances the contact efficiency between desulfurizer and flue gas, and meets environmental emission standards.
Smart Images
Figure CN224466766U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of desulfurizing agent conveying technology, and in particular to a desulfurizing agent conveying device. Background Technology
[0002] Low-sulfur flue gas is easily generated in heating furnaces and other locations during steel production processes. The corresponding flue gas emission indicators fluctuate significantly, restricting subsequent process flows and making it difficult to meet environmental protection requirements. Flue gas desulfurization methods are broadly classified into three categories: dry, semi-dry, and wet. In dry desulfurization technology, both the desulfurization absorbent and product treatment are carried out in a dry state. Calcium-based ultrafine powder dry desulfurization devices use powdered desulfurizing agents, resulting in low energy consumption, readily available raw materials, low investment and operating costs, and long equipment lifespan, leading to their widespread industrial application.
[0003] Under different operating conditions, the flue gas volume and SO2 concentration will change, and the supply of desulfurizing agent will also need to be changed accordingly. However, in related technologies, the desulfurizing agent delivery is not very flexible, and it is difficult to control the supply of desulfurizing agent. Utility Model Content
[0004] This application provides a desulfurizing agent conveying device, which to some extent improves the technical problems of low flexibility in desulfurizing agent conveying and difficulty in controlling the supply of desulfurizing agent in related technologies.
[0005] This application provides a desulfurizing agent conveying device, including:
[0006] Mounting bracket;
[0007] A desulfurizing agent storage silo and a desulfurizing agent conveying pipeline are provided. The desulfurizing agent storage silo is installed on the mounting bracket. The desulfurizing agent storage silo has a first inlet and a first outlet. The desulfurizing agent conveying pipeline is connected to the first inlet.
[0008] The variable frequency screw feeder has a second inlet and a second outlet, with the second inlet connected to the first outlet.
[0009] A first pipe and a second pipe are connected, the first pipe is connected to the second discharge port, the first pipe has a first interface for connecting to a flue, and the second pipe has a second interface for connecting to a nitrogen pipe.
[0010] In some embodiments, the desulfurizing agent conveying device further includes a valve located at the first discharge port.
[0011] In some embodiments, the desulfurizing agent conveying device further includes a compensator connected to the first discharge port and the second inlet port.
[0012] In some embodiments, the desulfurizing agent conveying device further includes a dust collector disposed on top of the desulfurizing agent storage silo.
[0013] In some embodiments, the desulfurizing agent conveying device further includes two rotary paddle level gauges, one of which is located at the top of the desulfurizing agent storage silo, and the other is located at the bottom of the desulfurizing agent storage silo.
[0014] In some embodiments, the desulfurizing agent delivery device further includes an arch-breaking gas disc, which is disposed at the lower part of the desulfurizing agent storage tank and is used to communicate with the nitrogen pipeline.
[0015] In some embodiments, the desulfurizing agent delivery device further includes a vibrator disposed at the lower part of the desulfurizing agent storage silo.
[0016] In some embodiments, the lower part of the desulfurizing agent storage silo is provided with a maintenance manhole.
[0017] In some embodiments, the desulfurizing agent delivery device further includes a vacuum release valve located at the top of the desulfurizing agent storage silo.
[0018] In some embodiments, the desulfurizing agent conveying device further includes a transmitter connected to the second discharge port, and the first pipe and the second pipe are connected to the transmitter.
[0019] The beneficial effects of this application are as follows:
[0020] In the desulfurizing agent conveying device provided in this application, a variable frequency screw feeder is provided. The variable frequency screw feeder has a second inlet and a second outlet. The second inlet is connected to the first outlet. That is, the desulfurizing agent in the desulfurizing agent storage bin is discharged through the variable frequency screw feeder. The variable frequency screw feeder can adjust the supply of desulfurizing agent by changing the motor frequency and the rotation speed of the screw device, thereby adapting to the changes in flue gas volume and flue gas SO2 concentration under different working conditions and improving the flexibility of desulfurizing agent conveying. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model.
[0022] Figure 1 A schematic diagram of the desulfurizing agent conveying device is shown.
[0023] Explanation of reference numerals in the attached figures:
[0024] 10-Desulfurizing agent conveying device, 100-Mounting bracket, 110-First leg, 120-Connecting rod, 130-Second leg, 200-Desulfurizing agent storage bin, 210-Valve, 220-Compensator, 230-Dust collector, 240-Rotator level gauge, 250-Arch breaking air disc, 260-Vacuum release valve, 270-Emitter, 280-Maintenance access port, 290-Vibrator, 300-Desulfurizing agent conveying pipeline, 400-Variable frequency screw feeder, 500-First pipeline, 510-First interface, 600-Second pipeline, 610-Second interface. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] It should be noted that all directional indications in this embodiment are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.
[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0029] Low-sulfur flue gas is easily generated in heating furnaces and other locations during steel production processes. The corresponding flue gas emission indicators fluctuate significantly, restricting subsequent process flows and making it difficult to meet environmental protection requirements. Flue gas desulfurization methods are broadly classified into three categories: dry, semi-dry, and wet. In dry desulfurization technology, both the desulfurization absorbent and product treatment are carried out in a dry state. Calcium-based ultrafine powder dry desulfurization devices use powdered desulfurizing agents, resulting in low energy consumption, readily available raw materials, low investment and operating costs, and long equipment lifespan, leading to their widespread industrial application.
[0030] Under different operating conditions, the flue gas volume and SO2 concentration will change, and the supply of desulfurizing agent will also need to be changed accordingly. However, in related technologies, the desulfurizing agent delivery is not very flexible, and it is difficult to control the supply of desulfurizing agent.
[0031] To improve the above-mentioned technical problems to a certain extent, this application provides a desulfurizing agent conveying device that can adjust the supply of desulfurizing agent to adapt to changes in flue gas volume and flue gas SO2 concentration under different operating conditions, thereby improving the flexibility of desulfurizing agent conveying.
[0032] The embodiments of this application will now be described with reference to the accompanying drawings:
[0033] Please see Figure 1 This application provides a desulfurizing agent conveying device 10 for conveying desulfurizing agent into the flue gas duct to fully contact and chemically react with SO2 in the flue gas, thereby achieving SO2 solidification and removal. Conventional calcium-based desulfurizing agents (such as coarse-grained limestone) have a slow reaction rate with sulfur dioxide in flue gas, especially under low calcium-to-sulfur ratio (Ca / S) conditions, making it difficult to meet increasingly stringent environmental emission standards. In contrast, calcium-based ultrafine powder desulfurizing agents have extremely small particle sizes and large specific surface areas (up to 5-10 times that of ordinary limestone), significantly increasing the contact area with SO2 and greatly improving reaction efficiency. Therefore, the desulfurizing agent in this application embodiment can be a calcium-based ultrafine powder desulfurizing agent.
[0034] In this embodiment, the desulfurizing agent conveying device 10 includes a mounting bracket 100, a desulfurizing agent storage bin 200, a desulfurizing agent conveying pipeline 300, a variable frequency screw feeder 400, a first pipeline 500, and a second pipeline 600. The desulfurizing agent storage bin 200 is mounted on the mounting bracket 100 and has a first inlet and a first outlet. The desulfurizing agent conveying pipeline 300 is connected to the first inlet. The variable frequency screw feeder 400 has a second inlet and a second outlet, and the second inlet is connected to the first outlet. The first pipeline 500 and the second pipeline 600 are connected, and the first pipeline 500 is connected to the second outlet. The first pipeline 500 has a first interface 510 for connecting to a flue, and the second pipeline 600 has a second interface 610 for connecting to a nitrogen pipeline.
[0035] Mounting bracket 100 is a basic component of desulfurizing agent conveying device 10, used to provide mounting foundation for at least other components of desulfurizing agent conveying device 10, so that the various components of desulfurizing agent conveying device 10 can be integrated together for easy use and transportation.
[0036] The desulfurizing agent storage silo 200 is used to store desulfurizing agent. The desulfurizing agent storage silo 200 is a sealed steel structure silo with a smooth, flat inner surface that does not accumulate powder. The first inlet is located at the top of the desulfurizing agent storage silo 200, and the first outlet is located at the bottom, allowing the desulfurizing agent to be discharged through the first outlet under gravity. A maintenance manhole is provided at the bottom of the desulfurizing agent storage silo 200 for maintenance personnel. Specifically, the mounting bracket 100 may include two first legs 110, which are set on the ground and positioned on either side of the desulfurizing agent storage silo 200 to support it.
[0037] The desulfurizing agent delivery pipeline 300 is used to connect to the pipeline on the tank truck to input the desulfurizing agent. Since the desulfurizing agent delivery pipeline 300 is connected to the first inlet, the desulfurizing agent can enter the desulfurizing agent storage silo 200 through the desulfurizing agent delivery pipeline 300.
[0038] It should be noted that, since the tanker truck is located on the ground, the first inlet is located on top of the desulfurizing agent storage silo 200. The tanker truck has a power unit to provide power for the desulfurizing agent, allowing the desulfurizing agent to rise within the desulfurizing agent conveying pipeline 300 to enter the first inlet. Furthermore, to prevent backflow of the desulfurizing agent, a valve can be installed at the inlet of the desulfurizing agent conveying pipeline 300.
[0039] Furthermore, since the desulfurizing agent conveying pipeline 300 needs to extend from bottom to top to connect the tanker truck and the first inlet, in order to ensure the stable installation of the desulfurizing agent conveying pipeline 300, the desulfurizing agent conveying device 10 may include a connecting rod 120 and a second support leg 130. There is a gap between the desulfurizing agent conveying pipeline 300 and the desulfurizing agent storage silo 200, and a gap between the desulfurizing agent conveying pipeline 300 and the ground. The connecting rod 120 is horizontally set and connects the desulfurizing agent storage silo 200 and the desulfurizing agent conveying pipeline 300. The second support leg 130 is vertically set and is located on the ground and supports the desulfurizing agent conveying pipeline 300.
[0040] The variable frequency screw feeder 400 is a device that uses variable frequency speed regulation to control the speed of a screw conveyor, achieving precise quantitative material feeding. The structure and principle of the variable frequency screw feeder 400 are existing technologies and will not be elaborated here. Since the second inlet is connected to the first outlet, the desulfurizing agent discharged through the first outlet enters the variable frequency screw feeder 400 and is discharged through the second outlet, then enters the flue through the first pipe 500. Because the variable frequency screw feeder 400 can adjust the supply of desulfurizing agent by changing the motor frequency and the rotation speed of the screw device, it can adapt to changes in flue gas volume and SO2 concentration under different operating conditions, improving the flexibility of desulfurizing agent delivery.
[0041] The second pipe 600 has a second interface 610 for communicating with a nitrogen pipe, and the second pipe 600 is connected to the first pipe 500. The second pipe 600 and the first pipe 500 can be arranged coaxially, and the first interface 510 and the second interface 610 are arranged opposite to each other, that is, the desulfurizing agent entering the first pipe 500 can enter the flue under the action of nitrogen injection.
[0042] In related technologies, the desulfurizing agent is injected into the flue by a Roots blower. In the embodiments of this application, the desulfurizing agent is injected into the flue by nitrogen gas, which can avoid the hidden danger of the desulfurizing agent not being able to be delivered due to equipment failure, and reduce the workload of on-site maintenance. The overall operation of the equipment is convenient and the control is flexible.
[0043] In some embodiments, the desulfurizing agent conveying device 10 further includes a valve 210, which is disposed at the first discharge port. The valve 210 is used to control the opening and closing of the first discharge port and the flow rate of the desulfurizing agent. Specifically, the valve 210 can be a manual slide gate valve.
[0044] In some embodiments, the desulfurizing agent conveying device 10 further includes a compensator 220, which is connected to the first discharge port and the second inlet port to isolate the mechanical vibration of the screw feeder during operation and prevent it from being transmitted to the desulfurizing agent storage silo 200. Specifically, the compensator 220 can be a metal compensator 220, which is a flexible connection component used in pipelines or equipment. It absorbs thermal expansion and contraction, vibration or displacement through the elastic deformation of the metal bellows, while maintaining sealing and pressure bearing capacity.
[0045] In some embodiments, the desulfurizing agent conveying device 10 further includes a dust collector 230, which is disposed on top of the desulfurizing agent storage silo 200. The desulfurizing agent storage silo 200 is a sealed structure. When the desulfurizing agent is filled, the negative pressure inside the desulfurizing agent storage silo 200 increases and dust gas is generated. The dust collector 230 disposed on top of the desulfurizing agent storage silo 200 can eliminate the negative pressure inside the silo and prevent dust gas from overflowing and polluting the atmospheric environment.
[0046] In some embodiments, the desulfurizing agent conveying device 10 further includes two rotary paddle level gauges 240, one of which is located at the upper part of the desulfurizing agent storage silo 200 and the other is located at the lower part of the desulfurizing agent storage silo 200.
[0047] The rotary paddle level gauge 240 is used to determine the amount of desulfurizer stored in the desulfurizer storage silo 200. The rotary paddle level gauge 240 located at the top is mainly used to indicate that the amount of desulfurizer in the desulfurizer storage silo 200 is too high, thus eliminating the need to add fresh desulfurizer; the rotary paddle level gauge 240 located at the bottom is mainly used to indicate that the amount of desulfurizer in the desulfurizer storage silo 200 is insufficient, requiring the addition of fresh desulfurizer.
[0048] In some embodiments, the desulfurizing agent delivery device 10 further includes an anti-bridging gas disc 250, which is disposed at the lower part of the desulfurizing agent storage silo 200. The anti-bridging gas disc 250 is used to communicate with a nitrogen pipeline and to prevent the desulfurizing agent from caking by periodically spraying nitrogen.
[0049] The desulfurizing agent conveying device 10 also includes a vibrator 290, which is located at the bottom of the desulfurizing agent storage silo 200. The vibrator 290 works in conjunction with the arch-breaking disc 250 to prevent the desulfurizing agent from accumulating and caking in the desulfurizing agent storage silo 200, thereby causing blockage problems.
[0050] In some embodiments, the desulfurizing agent delivery device 10 further includes a vacuum release valve 260, which is disposed on the top of the desulfurizing agent storage silo 200.
[0051] When the desulfurizing agent is extracted by the screw feeder or pneumatic conveying system, a negative pressure may be formed inside the silo. Excessive negative pressure can cause the silo wall to deform inward. Therefore, a vacuum release valve 260 can be installed on the top of the desulfurizing agent storage silo 200 to draw in external air to replenish the pressure and protect the silo structure.
[0052] In some embodiments, the desulfurizing agent conveying device 10 further includes a transmitter 270, which is connected to a second discharge port. The first pipe 500 and the second pipe 600 are connected to the transmitter 270. That is, the desulfurizing agent enters the transmitter 270 via the variable frequency screw feeder 400, and then enters the flue gas duct through nitrogen injection within the transmitter 270.
[0053] Calcium-based ultrafine powder desulfurizers have small particle sizes and large specific surface areas, making them prone to agglomeration or reduced flowability due to moisture absorption and static electricity. The transmitter 270 introduces compressed air (or other conveying gas) to fluidize the powder (giving it fluid-like flowability), preventing blockage at the bottom of the powder hopper and ensuring continuous and uniform powder output. Furthermore, the transmitter 270 is a core component of the pneumatic conveying system, using the kinetic energy of compressed air to "push" the powder out of the hopper, enabling long-distance (tens to hundreds of meters) or complex pipeline (such as bends and inclines) transport, thereby further improving the desulfurizer's conveying efficiency.
[0054] In summary, the desulfurizing agent conveying device 10 provided in this application is equipped with a variable frequency screw feeder 400. The variable frequency screw feeder 400 has a second inlet and a second outlet. The second inlet is connected to the first outlet. That is, the desulfurizing agent in the desulfurizing agent storage silo 200 is discharged through the variable frequency screw feeder 400. The variable frequency screw feeder 400 can adjust the supply of desulfurizing agent by changing the motor frequency and the rotation speed of the screw device, thereby adapting to the changes in flue gas volume and flue gas SO2 concentration under different working conditions and improving the flexibility of desulfurizing agent conveying.
[0055] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0056] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A desulfurizing agent conveying device, characterized in that, include: Mounting bracket; A desulfurizing agent storage silo and a desulfurizing agent conveying pipeline are provided. The desulfurizing agent storage silo is installed on the mounting bracket. The desulfurizing agent storage silo has a first inlet and a first outlet. The desulfurizing agent conveying pipeline is connected to the first inlet. The variable frequency screw feeder has a second inlet and a second outlet, with the second inlet connected to the first outlet. A first pipe and a second pipe are connected, the first pipe is connected to the second discharge port, the first pipe has a first interface for connecting to a flue, and the second pipe has a second interface for connecting to a nitrogen pipe.
2. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes a valve, which is located at the first discharge port.
3. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes a compensator, which is connected to the first discharge port and the second inlet port.
4. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes a dust collector, which is located on top of the desulfurizing agent storage silo.
5. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes two rotary paddle level gauges, one of which is located at the top of the desulfurizing agent storage silo, and the other is located at the bottom of the desulfurizing agent storage silo.
6. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes an arch-breaking gas disc, which is located at the bottom of the desulfurizing agent storage tank and is used to communicate with the nitrogen pipeline.
7. The desulfurizing agent conveying device according to claim 6, characterized in that, The desulfurizing agent conveying device also includes a vibrator, which is located at the bottom of the desulfurizing agent storage silo.
8. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent storage silo is equipped with a maintenance manhole at the bottom.
9. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device also includes a vacuum release valve, which is located at the top of the desulfurizing agent storage tank.
10. The desulfurizing agent conveying device according to claim 1, characterized in that, The desulfurizing agent conveying device further includes a transmitter, which is connected to the second discharge port, and the first pipe and the second pipe are connected to the transmitter.