Smoke conveying pretreatment device

Abstract

The utility model relates to a smoke dust conveying pretreatment device, which belongs to the technical field of smoke dust conveying pretreatment and comprises a body, a large smoke dust pipeline communicated with the body is arranged at the middle end of the body, a detachable screen which is obliquely arranged is arranged in the middle end of the body, and a bin wall vibrator is arranged on the outer side wall of the middle end of the body. A large smoke dust pipeline is arranged on the upper portion of the body, a screen is arranged on the upper portion of the large smoke dust pipeline, the bin wall vibrator is located on the outer side, corresponding to the screen, of the body, a hydraulic turning plate device hinged to the lower end of the screen is arranged below the large smoke dust pipeline, and a sealing access hole used for replacing the screen is formed in the body. Large smoke dust of a radiation part of the side-blowing waste heat boiler falls on the screen with a certain gradient and slides into the crusher to be crushed along the inclination angle of the screen under the action of the dead weight of the smoke dust, and fine particle powdery smoke dust of a convection part directly falls into the embedded scraper through the screen to be conveyed.

Description

Technical Field

[0001] This utility model relates to a dust conveying pretreatment device, belonging to the field of dust conveying pretreatment technology. Background Technology

[0002] The flue gas generated in the current oxygen-enriched side-blown smelting process first recovers waste heat through a side-blown waste heat boiler. At the same time, a large amount of dust brought in by the flue gas also settles down. The dust is then transported and collected using devices such as a scraper conveyor, dust crusher, and electric three-way valve before being reused in the furnace. However, this dust transport process has the following main problems:

[0003] 1. The flue gas was not processed according to particle size: The flue gas from the side-blown waste heat boiler is divided into radiant flue gas and convective flue gas. The radiant flue gas is blocky, and the convective flue gas is powdery. The particle size of the two is quite different. Normally, the two types of flue gas are fed into the flue gas crusher together for crushing and then conveyed by the buried scraper conveyor. The flue gas was not processed separately.

[0004] 2. High moisture content in the powdery flue gas: The flue gas generated by the side-blown molten pool process has a high moisture content. The flue gas in the convective section is at a lower temperature than the flue gas in the radiative section, making it easier to adhere to the flue gas crusher. Long-term accumulation will cause low-temperature corrosion of the flue gas crusher roller teeth, shortening the service life of the equipment.

[0005] 3. Electric three-way valves are prone to jamming and causing air leakage: Side-blown flue gas can be discharged to the flue gas tank or crushed in the flue gas crusher and then conveyed by the scraper after long-term use. Flue gas will accumulate at the transmission position of the three-way valve, causing the valve to not close completely and creating air leakage. This may cause dew point corrosion in the low-temperature zone inside the boiler and result in poor stability of the process system.

[0006] 4. Difficulty in handling abnormal flue gas conditions: When the furnace condition of the side-blown molten pool furnace flues, it will seriously affect the quality of flue gas in the subsequent boiler. Generally, this manifests as an increase in the amount of flue gas, which is prone to producing extra-large pieces of flue gas, which can block the flue gas conveying system and require manual cleaning, resulting in high labor intensity. Therefore, it is crucial to develop a flue gas conveying pretreatment device. Utility Model Content

[0007] This utility model addresses the shortcomings of the existing technology by providing a dust conveying pretreatment device.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0009] A dust conveying pretreatment device includes a main body, a large dust pipe connected to the middle of the main body, an inclined and detachable screen inside the middle of the main body, a bin wall vibrator on the outer side wall of the middle end, the bin wall vibrator being located on the outer side of the main body corresponding to the screen, a hydraulic flap device hinged to the lower end of the screen is provided below the large dust pipe, and a sealed maintenance port for replacing the screen is provided on the main body.

[0010] Furthermore, the hydraulic tilting device includes hydraulic cylinders installed on the front and rear sides of the main body, and the push rod of the hydraulic cylinder is provided with a connecting rod for connecting to the screen.

[0011] Furthermore, the screen is flipped at an angle of 0-35° by a hydraulic flipping device.

[0012] Furthermore, the inner wall of the body is provided with a slide for supporting the screen.

[0013] Furthermore, the large dust duct is connected to the crusher via a flange.

[0014] Furthermore, the upper end of the main body is provided with an upper connecting body that is connected to the dust collection pipe.

[0015] Furthermore, the upper connecting body is connected to the main body via a flange.

[0016] Furthermore, the lower end of the main body is connected to the scraper conveyor via a lower connecting body.

[0017] Furthermore, the lower connecting body is connected to the main body via a flange.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. This application utilizes an inclined screen to achieve automatic classification of flue dust. Large pieces of flue dust from the radiant section of the side-blown waste heat boiler fall onto the screen with a certain slope and slide down into the crusher for crushing by their own weight along the inclined angle of the screen. Meanwhile, fine particles of powdery flue dust from the convection section fall directly into the buried scraper conveyor for conveying through the screen.

[0020] 2. It avoids the adhesion of low-temperature and small-particle smoke and dust to the crusher roller teeth, which can effectively prevent low-temperature corrosion and extend the service life of the crusher.

[0021] 3. The electric three-way valve has been eliminated, reducing the number of air leakage points in the flue gas conveying system, lowering the dew point corrosion rate in the low-temperature zone inside the boiler, and improving process stability.

[0022] 4. The screen is flipped by a hydraulic tilting device. When large pieces of dust accumulate on the screen, they can be automatically dumped and transported into the crusher without the need for manual opening of the sealed inspection port for cleaning. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the main body, screen, bin wall vibrator, sealed inspection port, and hydraulic tipping device of this utility model.

[0025] Figure 3 This is a schematic diagram of the structure of the main body, screen, bin wall vibrator, sealed inspection port, and hydraulic tipping device of this utility model.

[0026] Figure 4 This is a schematic diagram of the structure of the main body, screen, bin wall vibrator, sealed inspection port, and hydraulic tipping device of this utility model.

[0027] In the diagram: 1. Main body; 2. Screen; 3. Bin vibrator; 4. Sealed inspection port; 5. Hydraulic tipping device; 6. Upper connecting body; 7. Large dust duct; 8. Crusher; 9. Lower connecting body; 10. Submerged scraper conveyor. Detailed Implementation

[0028] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0029] like Figures 1-4 As shown, a pretreatment device for conveying flue gas includes a main body 1. A large flue gas pipe 7, connected to the middle of the main body 1, is provided. An inclined and detachable screen 2 is located inside the middle of the main body 1. A bin vibrator 3 is located on the outer wall of the middle section, corresponding to the screen 2. A hydraulic flap device 5, hinged to the lower end of the screen 2, is located below the large flue gas pipe 7. A sealed inspection port 4 for replacing the screen 2 is provided on the main body 1. The screen 2 is installed and removed through the sealed inspection port 4. This application achieves the separate treatment of flue gas from the radiant and convective sections of a side-blown waste heat boiler by using the inclined screen 2 combined with the large flue gas pipe 7. The flue gas is then screened by its own weight along the inclined angle of the screen 2 and the bin vibrator 3. Large pieces of flue gas can be automatically conveyed to a crusher 8 for crushing, while smaller particles are conveyed by a scraper conveyor 10, enabling the classified conveying of flue gas of different particle sizes.

[0030] When conveying smelting fumes from an oxygen-enriched side-blown molten pool, the fumes enter the main body 1 and are first classified into lumpy fumes and fine fumes by a screen 2. The lumpy dust will slide down the inclined angle of the screen 2 onto the screen 2 using its own weight and be crushed in the crusher 8. The fine fumes passing through the screen 2 will directly enter the scraper conveyor 10 for conveying. The bin vibrator 3 can periodically vibrate the lumpy fumes accumulated on the screen 2 into the crusher 8 and clean the fine fumes adhering to the screen 2. The sealed inspection port 4 normally serves to seal the fumes and dust. If it is found that the screen 2 needs to be replaced, the sealed inspection port 4 can be opened to replace the screen 2. When the screen 2 is pressed down by large pieces of dust and cannot screen the fumes by itself, the hydraulic tipping device 5 flips the screen 2 upward by 0-35°, forcibly tilting the large pieces of dust on the screen 2 into the crusher 8.

[0031] The hydraulic tilting device 5 includes hydraulic cylinders installed on the front and rear sides of the main body 1. The push rods of the hydraulic cylinders are equipped with connecting rods that connect to the screen 2. The screen 2 can be tilted by the hydraulic tilting device 5 at an angle of 0-35°. When the side-blown molten pool furnace is in abnormal condition, the amount of dust in the radiant and convection sections of the side-blown waste heat boiler will increase, easily causing large dust particles to accumulate on the screen surface of the screen 2. In this case, the push rods of the hydraulic cylinders can be used to turn the large dust particles into the large dust duct 7, and then convey them to the crusher 8 for crushing. The hydraulic cylinders control the push rods to move forward and backward, thereby driving the connecting rods to rotate, which in turn causes the screen 2 to tilt.

[0032] The inner wall of the main body 1 is provided with a slide rail for supporting the screen 2. The slide rail is used to support the front and rear sides of the screen 2, ensuring that the screen 2 automatically cleans the accumulated dust when the bin wall vibrator 3 vibrates at regular intervals.

[0033] The large dust duct 7 is connected to the crusher 8 via a flange.

[0034] The upper end of the main body 1 is provided with an upper connecting body 6 that connects to the dust collection pipe. The upper connecting body 6 is connected to the main body 1 via a flange. The dust collection pipe, the upper connecting body 6, and the main body 1 are all connected by a flange for sealing.

[0035] The lower end of the main body 1 is connected to the scraper conveyor 10 via a lower connecting body 9. The lower connecting body 9 is connected to the main body 1 via a flange. The main body 1, the lower connecting body 9, and the scraper conveyor 10 are all connected by a flange seal.

[0036] This application utilizes an inclined screen 2 to automatically classify flue gas. Large pieces of flue gas from the radiant section of the side-blown waste heat boiler fall onto the inclined screen 2 and slide down into the crusher 8 for crushing due to their own weight. Meanwhile, fine particles of powdery flue gas from the convective section fall directly into the scraper conveyor 10 for transport. This prevents low-temperature, small-particle flue gas from adhering to the roller teeth of the crusher 8, effectively avoiding low-temperature corrosion and extending the service life of the crusher 8. The electric three-way valve is eliminated, reducing air leakage points in the flue gas conveying system, lowering the dew point corrosion rate in the low-temperature zone inside the boiler, and improving process stability. The screen 2 is flipped via a hydraulic tilting device 5, allowing it to automatically tilt and transport large pieces of flue gas to the crusher 8 when they accumulate, eliminating the need for manual opening of the sealed inspection port 4 for cleaning.

[0037] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A soot transport pre-treatment device comprising a body (1), characterized in that: The middle end of the body (1) is provided with a bulk dust pipe (7) in communication with the body (1), the inside of the middle end of the body (1) is provided with an obliquely arranged and detachable screen (2), the outer side wall of the middle end is provided with a bin wall vibrator (3) located outside the body (1) corresponding to the screen (2), the lower side of the bulk dust pipe (7) is provided with a hydraulic flap device (5) hinged to the lower end of the screen (2), and the body (1) is provided with a sealed access hole (4) for replacing the screen (2).

2. The soot transport pre-conditioning apparatus of claim 1, wherein: The hydraulic flap device (5) comprises hydraulic cylinders mounted on the front and rear sides of the body (1), and a connecting rod connected with the screen (2) is arranged on the push rod of the hydraulic cylinder.

3. The soot transport pre-conditioning apparatus of claim 1, wherein: The screen (2) is turned by the hydraulic flap device (5) at an angle of 0-35°.

4. A soot transport pre-conditioning device according to any one of claims 1-3, characterized in that: The inner side wall of the body (1) is provided with a slide for supporting the screen (2).

5. A soot transport pre-conditioning device according to any one of claims 1-3, characterized in that: The bulk dust pipe (7) is connected with the crusher (8) through a flange.

6. A soot transport pre-conditioning device according to any one of claims 1-3, characterized in that: The upper end of the body (1) is provided with an upper connecting body (6) connected with a dust falling pipe.

7. A soot transport pre-conditioning apparatus according to claim 6, characterised in that: The upper connecting body (6) is connected with the body (1) through a flange.

8. The soot transport pre-conditioning apparatus of any one of claims 1-3, wherein: The lower end of the body (1) is connected with the scraper conveyor (10) through a lower connecting body (9).

9. The soot transport pre-conditioning apparatus of claim 8, wherein: The lower connecting body (9) is connected with the body (1) through a flange.

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