Pulverized coal back-blowing and collecting device for injection pipeline of coal gun
By designing a coal powder back-blowing collection device for coal gun spraying pipelines, and using sealed powder collection boxes, dust removal bags and screen vibration mechanisms, the production stagnation and environmental pollution caused by blockage of coal guns and coal gun spraying pipelines is solved, efficient collection and secondary recycling of coal powder is achieved, and production costs are reduced.
Patent Information
- Application Number
- CN202421735746.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
During blast furnace production, coal guns and coal gun spray pipes are prone to blockage, resulting in stagnation of production. Conventional dredging methods will lead to coal powder leakage, polluting the environment and wasting energy.
A coal gun spray pipe coal powder back-blowing collection device is designed, including a sealed powder collection box and a dust removal cloth bag on the top. The coal powder is blown into the powder collection box by blowing air, and the inclined screen and spring vibration mechanism is used to screen foreign matters and agglomerate coal powder to achieve effective collection of coal powder.
The dust-free collection of coal powder is achieved, environmental pollution is avoided, and the secondary recycling of coal powder is reduced, and production costs are improved and production efficiency is improved.
Smart Images
Figure CN223033405U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of blast furnace production equipment, in particular to a pulverized coal back-blowing and collecting device for a coal gun injection pipeline. Background Technique
[0002] The coal injection gun is one of the important equipment in the blast furnace coal injection system and is used to inject pulverized coal into the blast furnace. In the actual production process, due to impurities or coal caking in the pulverized coal, blockage faults of the coal gun and the coal gun injection pipeline will occur during the injection process, resulting in the inability of the coal injection gun to continue working and the production stagnation. It is necessary to back-blow and dredge the coal injection gun and the coal gun injection pipeline. During the conventional dredging process, to clean the coal gun, it is necessary to open the coal gun valve to let out some pressure, and rely on the internal pressure of the blast furnace to push it out. When cleaning the pipeline from the coal injection distributor to the coal gun, it is necessary to jet air into the pipeline to eject the blockage. This direct external discharge method, on the one hand, the pulverized coal leaks out, and the dust will pollute the environment. On the other hand, the pulverized coal itself can still continue to burn, resulting in waste of energy. Therefore, a pulverized coal collection device for dredging the coal gun injection pipeline is needed, which can not only ensure a dust-free production environment, maintain the production environment and avoid pollution, but also recycle the blocked pulverized coal for secondary use, reducing costs and increasing efficiency. Content of the Utility Model
[0003] The technical problem to be solved by the utility model is to provide a pulverized coal back-blowing and collecting device for a coal gun injection pipeline, which can not only avoid the pollution of the externally discharged pulverized coal, but also effectively recycle the pulverized coal for continuous combustion to reduce costs and increase efficiency.
[0004] To solve the above technical problems, the technical solution adopted by the utility model is: a pulverized coal back-blowing and collecting device for a coal gun injection pipeline, including a main body sealed powder collection box. Support columns are arranged at the bottom of the powder collection box. A screen fixing seat is fixedly arranged on one inner wall of the powder collection box. A screen is hinged on the screen fixing seat. One end of the screen is the hinged end and the other end is hinged with a free end. The free end is arranged on the fixed platform on the other inner wall of the powder collection box. The position of the free end is higher than that of the hinged end. An insertion port for the coal gun injection pipeline is arranged on the side wall of the powder collection box. The side wall where the insertion port for the coal gun injection pipeline is arranged and the screen fixing seat are on the same side wall. The position of the insertion port for the coal gun injection pipeline is higher than that of the screen fixing seat. A plurality of through holes are opened at the top of the powder collection box. A dust removal cloth bag for pressure discharge is sleeved on each through hole through a steel pipe. A powder discharge port is arranged at the bottom of the powder collection box. A sealing valve is arranged on the powder discharge port.
[0005] Further improvement of the technical solution of the utility model lies in that: a limiting platform is arranged above the fixed platform on the inner wall of the powder collection box. A spring is connected between the bottom of the free end and the top of the fixed platform.
[0006] Further improvement of the technical solution of the utility model lies in that: a limiting baffle for preventing the spring from popping out is arranged at the edge of the fixed platform.
[0007] A further improvement of the technical solution of the present utility model lies in that: a debris discharge port is opened above the screen fixing seat on the side wall of the powder collection box, and a sealing valve is arranged on the debris discharge port.
[0008] A further improvement of the technical solution of the present utility model lies in that: the powder discharge port at the bottom of the powder collection box is funnel-shaped.
[0009] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model is as follows: by providing a sealed powder collection box and a plurality of dust removal cloth bags opened at the top of the powder collection box, the coal gun blowing pipeline can be inserted into the powder collection box, and the metal hose of the coal gun blowing pipeline can be blown by connecting the ventilation pipeline, so that the pulverized coal is blown into the powder collection box. The blown air is discharged through the dust removal cloth bags above, and at the same time, the dust removal cloth bags can also filter the pulverized coal, so that all the pulverized coal remains in the powder collection box. By arranging an inclined screen in the powder collection box, the pulverized coal blown out from the coal gun blowing pipeline can be deposited at the bottom of the powder collection box through the screen. Foreign matters or caked pulverized coal in the pulverized coal will be blocked by the screen and discharged through the debris discharge port, ensuring the purity of the collected pulverized coal. By providing a spring and a limit platform limit baffle cooperating with the spring at the free end of the screen, a deformation space is left for the screen. When the wind carrying pulverized coal or foreign matters blows to the screen, it will drive the spring to vibrate the screen, so that the foreign matters blocked are accumulated at the bottom of the screen under the action of gravity and vibration, which is convenient to be discharged through the debris discharge port. Description of the Drawings
[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;
[0011] Figure 1 is a schematic structural diagram of the present utility model;
[0012] Among them, 1. Powder collection box, 2. Insertion port of coal gun blowing pipeline, 3. Screen fixing seat, 31. Screen, 32. Limit platform, 33. Free end, 34. Spring, 35. Fixed platform, 36. Debris discharge port, 4. Dust removal cloth bag, 5. Powder discharge port. Detailed Embodiment
[0013] The following further describes the present utility model in detail with reference to the embodiments:
[0014] As Figure 1As shown in the figure, it is a schematic structural diagram of a pulverized coal backwashing and collecting device for a coal gun injection pipeline. The main body is a sealed powder collecting box 1, and the shape of the powder collecting box 1 is square, which is convenient for setting various devices on the side wall. Support columns are arranged at the bottom of the powder collecting box 1 to support the powder collecting box in the air. A powder discharging port 5 is arranged at the bottom of the powder collecting box 1, and a sealing valve is arranged on the powder discharging port 5, so that the collected pulverized coal can be discharged from the bottom powder discharging port 5. In order to facilitate the collection of pulverized coal, the powder discharging port 5 is funnel-shaped, and the pulverized coal at the bottom can be better aggregated by means of gravity, which is convenient for discharging from the powder discharging port 5.
[0015] On the inner wall of one side in the powder collecting box 1, a screen fixing seat 3 is fixedly arranged for installing a screen 31. The structure of the screen 31 is specifically that one end of the screen 31 is hinged with a hinged end, and the other end is hinged with a free end 33, and the hinged end is hinged on the screen fixing seat 3. A fixing platform 35 is arranged on the inner wall opposite to the inner wall where the screen fixing seat 3 is located, and the free end 33 is arranged on the fixing platform 35. When setting, it is ensured that the position of the fixing platform 35 is higher than the position of the screen fixing seat 3, that is, it is ensured that the position of the free end 33 is higher than the position of the hinged end, so as to ensure that the screen 31 is inclined in the powder collecting box 1. A coal gun injection pipeline insertion port 2 is arranged on the side wall of the powder collecting box 1. The side wall where the coal gun injection pipeline insertion port 2 is arranged and the screen fixing seat 3 are on the same side wall, and the setting position of the coal gun injection pipeline insertion port 2 is higher than the screen fixing seat 3, so as to ensure that after the coal gun injection pipeline is inserted, the air carrying pulverized coal ejected will pass through the screen. The coal gun injection pipeline specifically refers to the pipeline from the coal injection distributor to the coal gun, which is a metal hose. After the metal hose connecting the coal gun is removed from the coal gun, it is connected into the powder collecting box. Specifically, a pipe buckle for connecting with the hose is arranged on the side surface of the powder collecting box 1. A plurality of through holes are opened at the top of the powder collecting box 1, and a dust removal cloth bag 4 for pressure discharge is sleeved on each through hole through a steel pipe. In this embodiment, 16 through holes are opened in a 4×4 manner on the top of the box, and a total of 16 dust removal cloth bags are arranged for each through hole.
[0016] The function of the screen is to screen out foreign matters other than pulverized coal or caked pulverized coal in the blocked coal gun injection pipeline. After the coal gun injection pipeline is inserted into the powder collecting box 1, an air supply pipe is connected externally. After being fixed in cooperation with the pipe buckle, ventilation is carried out in the coal gun injection pipeline. The wind carrying pulverized coal and foreign matters blows towards the screen 31, and the foreign matters or caked pulverized coal are screened out by the screen 31. The pulverized coal passes through the screen and aggregates at the powder discharging port 5 below the screen. The excess air is discharged from the dust removal cloth bag 4 at the top, realizing the pressure discharge in the powder collecting box 1. At the same time, the dust removal cloth bag 4 will also filter the pulverized coal to a certain extent.
[0017] In order to effectively screen out foreign objects or caked pulverized coal blocked by the screen 31, a limiting platform 32 is arranged above the fixed platform 35 on the inner wall of the powder collection box 1. The limiting platform 32 and the fixed platform 35 are opposite in position, with a gap left between them. The free end 33 is arranged in the gap, and is connected to the top of the fixed platform 35 through a spring 34 at the bottom of the free end 33. The spring 34 is compressed by a certain deformation and fixedly arranged at the bottom of the free end and the top of the fixed platform 35. The spring 34 pushes up the free end 33 to tightly adhere to the lower surface of the limiting platform 32. At the same time, a limiting baffle is arranged at the edge of the fixed platform 35 to prevent the spring from popping out. Even if it is not firmly fixed, it can ensure that the spring is movably arranged within the fixed platform baffle. When the wind carrying pulverized coal or foreign objects blows onto the screen, the acting force will drive the deformation of the spring, vibrating the screen. The foreign objects and powder lumps intercepted on the screen will gather obliquely downward along the inclined screen under the action of vibration and gravity. On the side wall of the powder collection box 1 where the screen fixing seat 3 is located, at the position above the fixing seat 3, that is, at the bottom of the inclined screen, there is a debris discharge port 36. A sealing valve is arranged on the debris discharge port 36, and the debris or caked pulverized coal screened out by the screen can be discharged through the debris discharge port 36.
[0018] The present invention can effectively collect the pulverized coal in the blocked coal gun injection pipeline. On the one hand, it realizes a dust-free environment at the production site and reduces pollution. On the other hand, the recycled pulverized coal can be burned continuously, effectively reducing costs. Currently, one unit has been manufactured for the No. 1 furnace. When the coal gun injection pipeline is blocked and dredged, the effect is good. It not only improves the safety of discharging coal and dredging the pipeline, but also realizes no dust flying at the site during the coal discharging operation, avoiding polluting the on-site environment, and also realizes the secondary recycling of pulverized coal, reducing costs and increasing efficiency. Calculated according to the average of one blocked spray gun per shift, about 0.2 tons of coal are discharged per day, and the price of pulverized coal for injection is 1,250 yuan per ton. The economic benefit of recycling pulverized coal for one blast furnace per month is 0.75 ten thousand yuan per month; the annual economic benefit of recycling pulverized coal for the No. 1 blast furnace can reach 90,000 yuan.
[0019] The embodiments described above are only used to describe the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims
1. A coal gun injection pipeline coal powder back-blowing collection device, comprising a main body sealed powder collecting box (1), a support column is arranged at the bottom of the powder collecting box (1), and is characterized in that: A screen fixing seat (3) is fixedly arranged on the inner wall of one side of the powder collecting box (1), a screen (31) is hinged on the screen fixing seat (3), one end of the screen (31) is a hinged end and the other end is hinged with a free end (33), the free end (33) is arranged on a fixed platform (35) on the inner wall of the other side of the powder collecting box (1), and the free end is arranged at a position higher than the hinged end, a coal gun blowing pipe insertion port (2) is arranged on the side wall of the powder collecting box (1), the side wall of the coal gun blowing pipe insertion port (2) and the screen fixing seat (3) are arranged on the same side wall, and the coal gun blowing pipe insertion port (2) is arranged at a position higher than the screen fixing seat (3), a plurality of through holes are opened on the top of the powder collecting box (1), and a dust removal bag (4) for discharging pressure is arranged on each through hole through a steel pipe sleeve, a powder discharge port (5) is arranged on the bottom of the powder collecting box (1), and a sealing valve is arranged on the powder discharge port (5).
2. A coal gun injection pipeline coal powder back-blowing collection device according to claim 1, characterized in that: A limiting platform (32) is arranged above the fixed platform (35) on the inner wall of the powder collecting box (1), and the bottom of the free end (33) and the top of the fixed platform (35) are connected via a spring (34).
3. The coal powder back-blowing collection device for a coal gun injection pipeline according to claim 2 is characterized in that: The edge of the fixing platform (35) is provided with a limiting baffle for preventing the spring from popping out.
4. The coal powder back-blowing collection device for a coal gun injection pipeline according to claim 1 is characterized in that: A debris discharge port (36) is provided above the screen fixing seat (3) on the side wall of the powder collecting box (1), and a sealing valve is provided on the debris discharge port (36).
5. The coal powder back-blowing collection device for a coal gun injection pipeline according to claim 1 is characterized in that: The powder discharge port (5) at the bottom of the powder collecting box (1) is funnel-shaped.