Recycling device for fly ash of coking plant

Abstract

The invention discloses a coking plant fly ash recycling device, and relates to the field of coal coke chemical industry, the coking plant fly ash recycling device comprises a support base, the top of the support base is provided with a first screw conveyer, the first screw conveyer comprises a first variable frequency motor, and the right side of the first variable frequency motor is fixedly connected with the first screw conveyer. Materials are fed from a stock bin on the top of the second spiral conveyor, conveyed to an inner cavity of the first spiral conveyor through the second spiral conveyor and discharged through a discharging pipe, and in order to achieve quantitative feeding of a discharging port, a weighing sensor is arranged on the first spiral conveyor and can detect the weight of the conveyed materials and send out a signal in real time. The frequency converter dynamically adjusts the rotating speed of the feeding screw in the conveyor according to a material signal sent by the sensor, so that quantitative feeding is achieved, the quantitative feeding precision can reach 0.2%, the feeding capacity is about 0.1-100 t / h, and therefore the problems in the background technology are solved.

Description

Technical Field

[0001] The invention relates to the field of coal coke chemical industry, in particular to a dust recycling device for a coking plant. Background Art

[0002] Coal coke chemical industry plays a vital role in the rapid economic development of my country. Industry, agriculture and residents' lives are closely related to coke and its downstream products. At the same time, the coking industry is also a major source of pollution, especially dust pollution. The coal preparation section is the place where the most serious dust is generated in the coking plant. Before entering the coking furnace, the coal needs to go through the following processes: unloading by car or train, belt conveyor, coal blending, impurity removal, screening, crushing, humidification, etc. to meet the coking requirements, and then conveyed to the coke oven coal tower by belt, and waited in the coking operation area. The coke produced by the coke oven must go through the following processes: pushing coke, discharging coke, belt transportation, coke cutter, screening, loading, etc. to prepare for the blast furnace.

[0003] The present invention provides a device for recycling dust from a coking plant. During the coking production, a large amount of coking dust is generated. The toxic and harmful substances contained in the dust will pollute the environment and cause harm to the human body. The dust also has other characteristics of its own, such as flammability and explosiveness, etc. However, the commonly used dust removal method is usually to return the dust ash to the raw coal instead of the lean coal. Generally, the collected dust ash is transported to the coal yard for separate stacking, and then mixed with the raw coal for coal blending. The blended coal is transported to the coal tower via a belt conveyor. However, the dust ash in this process will generate secondary dust, and the transportation and storage both require higher costs. Therefore, this paper proposes a new dust ash recycling process, in order to be more environmentally friendly and economical. Summary of the invention

[0004] The purpose of the present invention is to provide a dust recycling device for a coking plant. Through the coordinated use of a first screw conveyor, a second screw conveyor, a first variable frequency motor, a second variable frequency motor, a speed sensor and a weighing sensor, the secondary dust can be prevented. At the same time, the dust can be recycled to improve the environmental protection effect, thereby solving the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: A dust recycling device for a coking plant comprises a supporting base, a first screw conveyor is arranged on the top of the supporting base, the first screw conveyor comprises a first variable frequency motor, the right side of the first variable frequency motor is fixedly connected to the first screw conveyor, a speed sensor is fixedly connected to the top of the first variable frequency motor, a discharge pipe is connected to the right side of the bottom of the first screw conveyor, the bottom of the discharge pipe passes through the supporting base and is connected to the first soft connection, a weighing sensor is fixedly connected to the bottom of the first screw conveyor, a second screw conveyor is arranged on the top of the first screw conveyor, the second screw conveyor comprises a second variable frequency motor, the right side of the second variable frequency motor is fixedly connected to the second screw conveyor, the left side of the bottom of the second screw conveyor is connected to the second soft connection, the bottom of the second soft connection is connected to the first screw conveyor, the right side of the top of the second screw conveyor is connected to the feed pipe, the top of the feed pipe is fixedly connected to the third soft connection, the surface of the third soft connection is fixedly connected to the gate body, and the top of the third soft connection is fixedly connected to the silo.

[0006] Furthermore, first fixing rings are sleeved on both sides of the surface of the second screw conveyor, the front and rear sides of the two first fixing rings are fixedly connected to limit plates, the bottoms of the two limit plates are fixedly connected to second fixing rings, the inner cavity of the second fixing ring is movably connected to the first screw conveyor, and the bottoms of the two second fixing rings are fixedly connected to the support base.

[0007] Furthermore, the front and rear sides of the two second fixing rings are fixedly connected with reinforcement blocks, and the bottoms of the two reinforcement blocks are fixedly connected to the support base.

[0008] Furthermore, a connecting ring is fixedly connected to the right side of the surface of the second screw conveyor, and the number of the connecting rings is two. The two connecting rings are fixedly connected to support plates on the opposite sides, and a limiting ring is fixedly connected to the top between the opposite sides of the two support plates, and the inner cavity of the limiting ring is fixedly connected to the silo.

[0009] Furthermore, the material of the first flexible connection is canvas, the material of the second flexible connection is plastic, and the material of the third flexible connection is rubber.

[0010] Furthermore, support legs are fixedly connected to both sides of the bottom of the support base, and positioning holes are provided on both sides of the tops of the two support legs.

[0011] Furthermore, the material of the silo is a steel structure, and the main materials of the first screw conveyor and the second screw conveyor are carbon steel Q235-B and cast iron.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The present invention provides a dust recycling device for a coking plant. Materials are fed from a silo at the top of a second screw conveyor, and are conveyed to an inner cavity of a first screw conveyor by the second screw conveyor and discharged from a discharge pipe. To achieve quantitative feeding at the discharge port, a weighing sensor is provided on the first screw conveyor. The sensor can detect the weight of the transported material and send a signal in real time. The frequency converter dynamically adjusts the rotation speed of the feeding screw in the conveyor according to the material signal sent by the sensor, thereby achieving quantitative feeding. The quantitative feeding accuracy can reach 0.2%, and the feeding capacity is about 0.1-100 t / h. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 It is a schematic diagram of the top view structure of the present invention;

[0016] Figure 3 It is a schematic cross-sectional structural diagram of a second screw conveyor of the present invention;

[0017] Figure 4 It is a schematic cross-sectional structural diagram of the first screw conveyor of the present invention.

[0018] In the figure: 1. support base; 2. first screw conveyor; 3. first variable frequency motor; 4. speed sensor; 5. discharge pipe; 6. first flexible connection; 7. weighing sensor; 8. second screw conveyor; 9. second variable frequency motor; 10. second flexible connection; 11. feed pipe; 12. third flexible connection; 13. gate body; 14. silo; 15. first fixing ring; 16. limit plate; 17. second fixing ring; 18. reinforcement block; 19. connecting ring; 20. support plate; 21. limit ring; 22. support leg; 23. positioning hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In order to solve the technical problems that the existing dust removal ash will generate secondary dust and the transportation and storage require higher costs, such as Figure 1-4 As shown, the following preferred technical solutions are provided:

[0021] A dust recycling device for a coking plant comprises a support base 1, a first screw conveyor 2 is arranged on the top of the support base 1, the first screw conveyor 2 comprises a first variable frequency motor 3, the right side of the first variable frequency motor 3 is fixedly connected to the first screw conveyor 2, a speed sensor 4 is fixedly connected to the top of the first variable frequency motor 3, a discharge pipe 5 is connected to the right side of the bottom of the first screw conveyor 2, the bottom of the discharge pipe 5 passes through the support base 1 and is connected to a first soft connection 6, a weighing sensor 7 is fixedly connected to the bottom of the first screw conveyor 2, and a load cell 7 is fixedly connected to the top of the first screw conveyor 2. A second screw conveyor 8 is provided, and the second screw conveyor 8 includes a second variable frequency motor 9. The right side of the second variable frequency motor 9 is fixedly connected to the second screw conveyor 8. The left side of the bottom of the second screw conveyor 8 is connected with a second flexible connection 10. The bottom of the second flexible connection 10 is connected with the first screw conveyor 2. The right side of the top of the second screw conveyor 8 is connected with a feed pipe 11. The top of the feed pipe 11 is fixedly connected with a third flexible connection 12. The surface of the third flexible connection 12 is fixedly connected with a gate body 13, and the top of the third flexible connection 12 is fixedly connected with a silo 14.

[0022] First fixing rings 15 are sleeved on both sides of the surface of the second screw conveyor 8, the front and rear sides of the two first fixing rings 15 are fixedly connected to limit plates 16, the bottoms of the two limit plates 16 are fixedly connected to second fixing rings 17, the inner cavity of the second fixing ring 17 is movably connected to the first screw conveyor 2, and the bottoms of the two second fixing rings 17 are fixedly connected to the support base 1.

[0023] The front and rear sides of the two second fixing rings 17 are fixedly connected with reinforcement blocks 18 , and the bottoms of the two reinforcement blocks 18 are fixedly connected to the support base 1 .

[0024] The material of the first flexible connection 6 is canvas, the material of the second flexible connection 10 is plastic, and the material of the third flexible connection 12 is rubber.

[0025] The material of the silo 14 is a steel structure, and the main materials of the first screw conveyor 2 and the second screw conveyor 8 are carbon steel Q235-B and cast iron.

[0026] Specifically, when in use, the material is fed from the silo 14 at the top of the second screw conveyor 8, and the feeding amount is controlled by the size of the gate opening and closing angle. While connecting various devices through the first flexible connection 6, the second flexible connection 10 and the third flexible connection 12, it is avoided that the external forces such as silo pressure and equipment stress are transmitted between the devices, resulting in inaccurate weighing. Then, the material in the silo 14 is sent to the inner cavity of the first screw conveyor 2 at a certain speed through the second screw conveyor 8, and the material is transported through the second flexible connection 10 through the first screw conveyor 2. The motor speed can be adjusted by setting the variable frequency motor. The rotation speed of the screw inside the screw conveyor is adjusted to adjust the transportation capacity of the screw conveyor. The material transported by the second screw conveyor 8 is then sent to the discharge pipe 5 through the first screw conveyor 2 for discharge. In order to achieve quantitative feeding at the discharge port, a weighing sensor 7 is provided on the first screw conveyor 2. The sensor can detect the weight of the transported material and send a signal in real time. The frequency converter dynamically adjusts the rotation speed of the feeding screw in the conveyor according to the material signal sent by the sensor, thereby achieving quantitative feeding. The quantitative feeding accuracy can reach 0.2%, and the feeding capacity is about 0.1-100t / h.

[0027] In order to solve the technical problem that the silo 14 is not stable enough, such as Figure 3 As shown, the following preferred technical solutions are provided:

[0028] A connecting ring 19 is fixedly connected to the right side of the surface of the second screw conveyor 8. There are two connecting rings 19. Support plates 20 are fixedly connected to the opposite sides of the two connecting rings 19. A limiting ring 21 is fixedly connected to the top between the opposite sides of the two support plates 20. The inner cavity of the limiting ring 21 is fixedly connected to the silo 14.

[0029] Specifically, the fixing of the support plate 20 and the limiting ring 21 serves to reinforce the silo 14 and the second screw conveyor 8 and the silo 14 .

[0030] In order to solve the technical problem that the support base 1 is inconvenient to position, such as Figure 3 and Figure 4 As shown, the following preferred technical solutions are provided:

[0031] Support legs 22 are fixedly connected to both sides of the bottom of the support base 1 , and positioning holes 23 are formed on both sides of the tops of the two support legs 22 .

[0032] Specifically, a positioning hole 23 is provided on the top of the supporting leg 22 to facilitate positioning of the supporting base 1 .

[0033] Working principle: When in use, the material is fed from the silo 14 at the top of the second screw conveyor 8, and the feeding amount is controlled by the opening and closing angle of the gate. The first flexible connection 6, the second flexible connection 10 and the third flexible connection 12 are used to connect various devices to avoid inaccurate weighing due to external forces such as silo pressure and equipment stress being transmitted between devices. Then, the material in the silo 14 is sent to the inner cavity of the first screw conveyor 2 at a certain speed through the second screw conveyor 8, and the material is transported through the second flexible connection 10 through the first screw conveyor 2. The motor speed can be adjusted by setting the variable frequency motor. The rotation speed of the screw inside the whole screw conveyor is adjusted to adjust the transportation capacity of the screw conveyor. Then the material transported by the second screw conveyor 8 is sent to the discharge pipe 5 through the first screw conveyor 2 for discharge. In order to realize quantitative feeding at the discharge port, a weighing sensor 7 is provided on the first screw conveyor 2. The sensor can detect the weight of the transported material and send out a signal in real time. The frequency converter dynamically adjusts the rotation speed of the feeding screw in the conveyor according to the material signal sent by the sensor, thereby realizing quantitative feeding. The quantitative feeding accuracy can reach 0.2%, and the feeding capacity is about 0.1-100t / h.

[0034] In summary: the dust recycling device of the coking plant solves the problem that the existing dust removal device is prone to generate secondary dust and the transportation and storage require higher costs through the coordinated use of the supporting base 1, the first screw conveyor 2, the first frequency conversion motor 3, the speed sensor 4, the discharge pipe 5, the first flexible connection 6, the weighing sensor 7, the second screw conveyor 8, the second frequency conversion motor 9, the second flexible connection 10, the feed pipe 11, the third flexible connection 12, the gate body 13 and the silo 14.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dust recycling device for a coking plant, comprising a support base (1), characterized in that: A first screw conveyor (2) is arranged on the top of the support base (1), the first screw conveyor (2) comprises a first variable frequency motor (3), the right side of the first variable frequency motor (3) is fixedly connected to the first screw conveyor (2), the top of the first variable frequency motor (3) is fixedly connected to a speed sensor (4), the right side of the bottom of the first screw conveyor (2) is connected to a discharge pipe (5), the bottom of the discharge pipe (5) passes through the support base (1) and is connected to a first flexible connection (6), the bottom of the first screw conveyor (2) is fixedly connected to a weighing sensor (7), the top of the first screw conveyor (2) is arranged with a second screw conveyor ( 8), the second screw conveyor (8) comprises a second variable frequency motor (9), the right side of the second variable frequency motor (9) is fixedly connected to the second screw conveyor (8), the left side of the bottom of the second screw conveyor (8) is connected to a second flexible connection (10), the bottom of the second flexible connection (10) is connected to the first screw conveyor (2), the right side of the top of the second screw conveyor (8) is connected to a feed pipe (11), the top of the feed pipe (11) is fixedly connected to a third flexible connection (12), the surface of the third flexible connection (12) is fixedly connected to a gate body (13), and the top of the third flexible connection (12) is fixedly connected to a silo (14).

2. A coking plant dust recycling device according to claim 1, characterized in that: First fixing rings (15) are sleeved on both sides of the surface of the second screw conveyor (8); the front and rear sides of the two first fixing rings (15) are fixedly connected to limit plates (16); the bottoms of the two limit plates (16) are fixedly connected to second fixing rings (17); the inner cavity of the second fixing ring (17) is movably connected to the first screw conveyor (2); and the bottoms of the two second fixing rings (17) are fixedly connected to the support base (1).

3. The recycling device for dust removal from a coking plant according to claim 1 is characterized by: The front and rear sides of the two second fixing rings (17) are fixedly connected to reinforcement blocks (18), and the bottoms of the two reinforcement blocks (18) are fixedly connected to the support base (1).

4. The recycling device for dust removal from a coking plant according to claim 1 is characterized by: A connecting ring (19) is fixedly connected to the right side of the surface of the second screw conveyor (8), and the number of the connecting rings (19) is two. The two connecting rings (19) are fixedly connected to support plates (20) on the opposite sides, and a limiting ring (21) is fixedly connected to the top between the opposite sides of the two support plates (20), and the inner cavity of the limiting ring (21) is fixedly connected to the silo (14).

5. The device for recycling dust from a coking plant according to claim 1, characterized in that: The material of the first flexible connection (6) is canvas, the material of the second flexible connection (10) is plastic, and the material of the third flexible connection (12) is rubber.

6. The device for recycling dust from a coking plant according to claim 1, characterized in that: Support legs (22) are fixedly connected to both sides of the bottom of the support base (1), and positioning holes (23) are provided on both sides of the tops of the two support legs (22).

7. The device for recycling dust from a coking plant according to claim 1, characterized in that: The material of the silo (14) is a steel structure, and the main materials of the first screw conveyor (2) and the second screw conveyor (8) are carbon steel Q235-B and cast iron.

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