A continuous efficient slag separation system

Abstract

The utility model relates to the solid dangerous waste pyrolysis technical field relates to a continuous high -efficient separation out of slag system, include: the one end of discharge screw conveyor stretches into pyrolysis furnace, and the other end communicates with the discharge pipe, and the middle part of discharge pipe is connected negative pressure pipe, and one end of negative pressure pipe is connected air -sentrifugal valve, and the other end is connected bin, and the bottom of bin is connected ash screw conveyor, and the upper end of bin is provided with pulse dust collector, and the air after pulse dust collector filtration is discharged through exhaust port, and the dust falls into ash screw conveyor through the bottom of bin, and the upper end of discharge pipe that meets negative pressure pipe is provided with multilayer baffle paddle, and the dust inhales bin under the action of negative pressure after material disperses through baffle paddle, and the slag block falls to the out of slag screw conveyor in discharge pipe.

Description

Technical Field

[0001] This utility model belongs to the field of solid hazardous waste pyrolysis technology, and relates to a continuous and efficient slag separation system. Background Technology

[0002] Pyrolysis technology for solid and hazardous waste is a treatment process carried out in an anaerobic or hypoxic environment. By heating, the organic components in solid waste are decomposed into small-molecule gases, liquids, and solid products. These products include combustible gases (such as hydrogen and methane), liquid oil, and solid residues, which contain large solid particles such as small stones and bricks.

[0003] Traditional slag removal methods are mainly divided into three types: screw conveyor slag removal, scraper conveyor slag removal, and negative pressure pneumatic conveying slag removal. Among them, screw conveyor slag removal is inefficient and time-consuming, which significantly affects the processing efficiency; scraper conveyor slag removal cannot separate large pieces of tailings, resulting in powdery tailings mixing with large pieces of tailings and entering the silo, reducing the economic value of resource utilization; negative pressure pneumatic conveying slag removal cannot achieve negative pressure pneumatic conveying for materials containing large solid pieces.

[0004] Therefore, there is an urgent need for a high-efficiency discharge device for pyrolysis furnaces that can adapt to both dust discharge and pneumatic conveying discharge of impurities. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous and efficient slag separation system, which is applicable to solid and hazardous waste pyrolysis treatment systems, cement kiln treatment systems, etc. It is suitable for industries such as oilfield environmental protection, lime production, and cement production. It can adapt to the discharge of ash and the separation and pneumatic discharge of impurity materials, and solve the problem of inefficient material discharge from pyrolysis furnaces.

[0006] To achieve the above-mentioned functions, this utility model provides the following technical solution:

[0007] This utility model provides a continuous and efficient slag separation and discharge system, comprising: a discharge screw conveyor, one end of which extends into a pyrolysis furnace and the other end is connected to a discharge pipe; a negative pressure pipe is connected to the middle of the discharge pipe; one end of the negative pressure pipe is connected to an air conveying valve and the other end is connected to a silo; a ash discharge screw conveyor is connected to the bottom of the silo; a pulse dust collector is installed at the upper end of the silo; air filtered by the pulse dust collector is discharged through an exhaust port; dust falls into the ash discharge screw conveyor through the bottom of the silo; and multiple layers of baffles are installed at the upper end of the discharge pipe that intersects with the negative pressure pipe. After the material is dispersed by the baffles, dust is sucked into the silo under negative pressure, and slag blocks fall into the slag discharge screw conveyor through the discharge pipe.

[0008] Furthermore, multiple baffle plates are uniformly welded along the inner circumference of the discharge pipe in each layer, and the inclination angle of the baffle plates is 45°~60°.

[0009] Furthermore, the baffles on adjacent layers are staggered to the left and right.

[0010] Preferably, the tilt angle of the baffle lever is 60°.

[0011] Furthermore, a negative pressure fan is installed between the pulse dust collector and the exhaust port, and the negative pressure fan adjusts the negative pressure in the exhaust pipe to -2.5kPa to -3.0kPa.

[0012] Furthermore, the junction of the negative pressure pipe and the discharge pipe is Y-shaped, with a junction angle of 30° to 60°.

[0013] Furthermore, the air delivery valve controls the air velocity in the negative pressure pipe to be between 18 and 25 m / s.

[0014] Furthermore, the discharge pipe is perpendicular to the discharge screw conveyor.

[0015] Furthermore, the discharge screw conveyor, the ash discharge screw conveyor, and the slag discharge screw conveyor...

[0016] All conveyors are shaftless screw conveyors.

[0017] Furthermore, the discharge screw conveyor extends 30-50 cm into the pyrolysis furnace.

[0018] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0019] This invention extends the discharge screw conveyor 30cm to 50cm into the required pyrolysis furnace. The rotating pyrolysis furnace carries the material into the discharge screw conveyor, which then transports the material to the discharge pipe. Baffles and deflectors are welded into the discharge pipe. The material, falling due to gravity, is dispersed upon encountering the baffles and deflectors, ensuring thorough separation of dust and large slag pieces. A pneumatic valve controls the airflow and adjusts the air pressure within the negative pressure pipe to prevent the escape of fine dust. When the material passes through the intersection of the discharge pipe and the negative pressure pipe, dust is drawn into the hopper under negative pressure. The dust-laden air is filtered by a pulse dust collector and discharged through the exhaust port. The dust in the hopper falls downwards onto the ash discharge screw conveyor, which transports it to a designated location or loads it into ton bags for storage. Large slag pieces fall through the discharge pipe onto the slag discharge screw conveyor, which transports the slag pieces to a designated location or loads them into ton bags for storage. This system achieves the separation, classified storage, and continuous, rapid slag discharge of dust and slag. Attached Figure Description

[0020] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[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 or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the continuous and efficient slag separation system of this utility model.

[0023] Wherein: 1-pyrolysis furnace; 2-discharge screw conveyor; 3-discharge pipe; 4-negative pressure pipe; 5-air conveying valve; 6-silo; 7-ash discharge screw conveyor; 8-pulse dust collector; 9-exhaust port; 10-slag discharge screw conveyor; 11-negative pressure fan; 12-exhaust pipe. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of this invention as detailed in the appended claims.

[0025] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] See Figure 1 As shown, this utility model provides a continuous and efficient slag separation system, which consists of a discharge screw conveyor 2, a discharge pipe 3, an air conveying valve 5, a slag discharge screw conveyor 10, a negative pressure pipe 4, a silo 6, a pulse dust collector 8, a negative pressure fan 11, an ash discharge screw conveyor 7, and an exhaust port 9.

[0027] Specifically, according to the material conveying sequence, one end of the discharge screw conveyor 2 extends into the pyrolysis furnace 1 by 30cm to 50cm, and the gap between the extended end and the pyrolysis furnace 1 is sealed with packing. The discharge screw conveyor 2 is a directional conveyor, equipped with helical blades. When the material is conveyed to the designated discharge port, it leaves the discharge screw conveyor 2 by gravity and enters the discharge pipe 3. In other words, a discharge port is provided at the material conveying end of the discharge screw conveyor 2, and the lower end of the discharge port is connected to the discharge pipe 3. The discharge pipe 3 is perpendicular to the discharge screw conveyor 2.

[0028] Specifically, following the direction of material conveying through the discharge pipe 3, a negative pressure pipe 4 is connected and communicates with the middle of the discharge pipe 3. The intersection of the negative pressure pipe 4 and the discharge pipe 3 forms a Y-shape with an intersection angle ω of 30°~60°. The negative pressure pipe 4 is inclined upward relative to the horizontal plane. This is to allow a small amount of broken slag material entering the negative pressure pipe 4 to slide down into the discharge pipe 3 under the action of gravity. Multiple layers of baffles and deflectors are installed in the upper end of the discharge pipe 3 where it intersects with the negative pressure pipe 4. After the material is dispersed by the baffles and deflectors, dust is sucked into the hopper 6 under negative pressure, and slag blocks fall into the slag discharge screw conveyor 10 through the discharge pipe 3. Multiple baffles on each layer are uniformly welded to the inner wall of the discharge pipe 3 along its circumferential direction. Adjacent layers of baffles are staggered, and each baffle has a downward tilt angle between 45° and 60°, preferably 60°. This arrangement of baffles disperses the material in multiple stages, and the staggered arrangement prevents blockage within the pipe. The baffles act like obstructions within the pipe. Material falls to the baffles by gravity, bounces off, and is dispersed after multiple collisions. Dust is drawn into the hopper 6 under negative pressure, while slag-like material falls along the discharge pipe 3 into the slag conveyor 10 located below it. The baffles of this invention are made of carbon steel.

[0029] Specifically, at the right end of negative pressure pipe 4 (according to...) Figure 1 Connect the air delivery valve 5 (in the direction of the device). The air delivery valve 5 can be a butterfly valve with an opening area to the cross-sectional area of ​​the negative pressure pipe 4 in a ratio of 0.6 to 0.8. The air delivery valve 5 controls the air velocity in the negative pressure pipe 4 at 18 to 25 m / s. Specifically, the opening size of the air delivery valve 5 is manually adjusted according to the length of the negative pressure pipe 4 to control the air pressure and prevent fly ash leakage. The air delivery valve 5 controls the air intake to prevent insufficient intake air.

[0030] Specifically, at the left end of negative pressure pipe 4 (according to...) Figure 1 The device is connected to the hopper 6 (in the direction of the device). The bottom of the hopper 6 is connected to the ash discharge screw conveyor 7. The upper end of the hopper 6 is equipped with a pulse dust collector 8. The air filtered by the pulse dust collector 8 is discharged through the exhaust port. The bottom of the hopper 6 is connected to the ash discharge screw conveyor 7. The dust falls into the ash discharge screw conveyor 7 through the ash discharge port set at the bottom of the hopper 6. The ash discharge screw conveyor 7 is then transported to the designated location or stored in ton bags.

[0031] Specifically, a negative pressure fan 11 is installed between the pulse dust collector 8 and the exhaust port 9. The negative pressure fan 11 adjusts the negative pressure in the exhaust pipe 12 to -2.5 kPa to -3.0 kPa. When the negative pressure fan 11 is running, it creates a negative pressure environment within the system, meaning the air pressure inside the system is lower than the outside pressure. This pressure difference drives the directional flow of air and dust-laden gas, providing a power source for the entire dust removal system. Under the action of negative pressure, the dust-laden gas enters the filter bags of the pulse dust collector 8. The dust is blocked on the surface of the filter bags, while the filtered clean gas passes through the filter bags and is discharged from the system by the negative pressure fan 11, completing the "air-dust separation".

[0032] The discharge screw conveyor 2, ash discharge screw conveyor 7, and slag discharge screw conveyor 10 in this utility model are all shaftless screw conveyors. The LS315 model is available, and the screw conveyor model can be selected according to the site conditions.

[0033] Example 1

[0034] When pyrolysis furnace 1 needs to discharge material, a filter screen with a mesh size of 50mm is installed at the end of the discharge screw conveyor 2. The end with the filter screen is then inserted into the pyrolysis furnace 1. The rotation of the pyrolysis furnace 1 carries the material into the discharge screw conveyor 2, which then transports the material to the discharge port. Under gravity, the material falls into the discharge pipe 3. The discharge pipe 3 has a diameter of 273mm and a baffle plate length of 100mm. Four to five layers of baffle plates are welded inside the discharge pipe 3 from top to bottom. As the material flows downwards by gravity, it is dispersed upon encountering the baffle plates, facilitating pneumatic conveying and clean separation from large slag particles. The air-feeding valve 5, located at one end of the negative pressure pipe 4, controls the air intake to prevent insufficient intake. When material passes through the intersection of the discharge pipe 3 and the negative pressure pipe 4, dust is drawn into the hopper 6 under negative pressure. The dust-laden air is filtered by the pulse dust collector 8 and then discharged. The dust in the hopper 6 falls into the ash discharge screw conveyor 7 through the ash discharge port at the bottom of the hopper 6, and is then transported to a designated location or stored in ton bags. Large slag blocks fall from the bottom of the discharge pipe 3 into the slag discharge screw conveyor 10, which transports the slag blocks to a designated location or stores them in ton bags. This achieves the separation and classified storage of dust and slag blocks, resulting in continuous and rapid slag discharge.

[0035] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0036] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A continuous and efficient slag separation system, characterized in that, include: The discharge screw conveyor (2) has one end extending into the pyrolysis furnace (1) and the other end connected to the discharge pipe (3). The middle part of the discharge pipe (3) is connected to the negative pressure pipe (4). One end of the negative pressure pipe (4) is connected to the air delivery valve (5), and the other end is connected to the silo (6). The bottom of the silo (6) is connected to the ash discharge screw conveyor (7). A pulse dust collector (8) is installed at the top of the silo (6). The air filtered by the pulse dust collector (8) is discharged through the exhaust port (9), and the dust falls into the ash discharge screw conveyor (7) from the bottom of the silo (6). The upper end of the discharge pipe (3) which intersects with the negative pressure pipe (4) is equipped with multiple baffles. After the material is dispersed by the baffles, the dust is sucked into the hopper (6) under the action of negative pressure, and the slag blocks fall into the slag discharge screw conveyor (10) through the discharge pipe (3).

2. The continuous and efficient slag separation system according to claim 1, characterized in that, Multiple baffles are uniformly welded along the inner circumference of the discharge pipe (3) in each layer, and the inclination angle of the baffles is 45°~60°.

3. The continuous and efficient slag separation system according to claim 1, characterized in that, The baffles on two adjacent layers are staggered to the left and right.

4. The continuous and efficient slag separation system according to claim 1, characterized in that, A negative pressure fan (11) is provided between the pulse dust collector (8) and the exhaust port (9), and the negative pressure fan (11) adjusts the negative pressure in the exhaust pipe (12) to -2.5kPa~-3.0kPa.

5. The continuous and efficient slag separation system according to claim 1, characterized in that, The negative pressure pipe (4) and the discharge pipe (3) intersect in a Y-shaped structure with an intersection angle of 30°~60°.

6. The continuous and efficient slag separation system according to claim 1, characterized in that, The air delivery valve (5) controls the air velocity in the negative pressure pipe (4) to be 18~25m / s.

7. The continuous and efficient slag separation system according to claim 1, characterized in that, The discharge pipe (3) is perpendicular to the discharge screw conveyor (2).

8. The continuous and efficient slag separation system according to claim 1, characterized in that, The discharge screw conveyor (2), ash discharge screw conveyor (7) and slag discharge screw conveyor (10) are all shaftless screw conveyors.

9. The continuous and efficient slag separation system according to claim 1, characterized in that, The air delivery valve (5) is a butterfly valve with an opening area ratio of 0.6 to 0.8 to the cross-sectional area of ​​the negative pressure pipe (4).

10. The continuous and efficient slag separation system according to claim 1, characterized in that, The discharge screw conveyor (2) extends 30-50cm into the pyrolysis furnace (1).

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