CN-115555261-B - Molded coal pre-powder removing system and powder removing method of molded coal pre-powder removing system

Abstract

The invention provides a molded coal pre-threshing system and a threshing method of the molded coal pre-threshing system, which are used for modifying molded coal before oxidation and carbonization processes so as to remove coal dust on the surface of the molded coal and recycle the coal dust, wherein the molded coal pre-threshing system comprises a gravity-free stirring device, a first separator and a second separator, and the first separator is provided with a first separation cavity, a first separation inlet, a first separation outlet and a first coal dust outlet which are communicated with the first separation cavity; the second separator is provided with a second separation cavity, a second separation inlet communicated with the second separation cavity and a second separation outlet. The invention solves the problems that the molded coal crushed material in the prior art has higher de-crushing rate in the carbonization process and the fallen coal powder cannot be recycled.

Inventors

• ZHAO LONG
• LUO FU
• YAN ZHIFU
• ZHOU HUA
• DU HUIHUI
• ZHANG YANJIANG
• ZHANG HUI
• ZHUANG WEI
• CHEN ZHENYU
• ZHANG WUBIN
• LI HAISHAN

Assignees

• 国家能源集团新疆能源有限责任公司

Dates

Publication Date

20260512

Application Date

20220928

Claims (13)

1. 1. The utility model provides a moulded coal is powder system in advance, its characterized in that is used for carrying out the modification to moulded coal before oxidation, carbomorphism process to get rid of the buggy on the surface of moulded coal, and will the buggy carries out recycle, the moulded coal is powder system in advance includes: A gravity-free stirring device (10), wherein the gravity-free stirring device (10) is provided with a stirring cavity (11), a molded coal inlet (12), a molded coal outlet (13) and a coal dust outlet (14) which are communicated with the stirring cavity (11); A first separator (20), wherein the first separator (20) is provided with a first separation cavity (21), a first separation inlet (22) communicated with the first separation cavity (21), a first separation outlet and a first coal dust outlet (24), the first separation inlet (22) is communicated with the molded coal outlet (13), and the first separation outlet is communicated with a conveying device (50) so as to convey the molded coal subjected to the powder removal treatment to an oxidation and carbonization station through the conveying device (50); a second separator (30), the second separator (30) having a second separation chamber (31), and a second separation inlet (32) and a second separation outlet in communication with the second separation chamber (31), wherein the pulverized coal outlet (14) and the first pulverized coal outlet (24) are both in communication with the second separation inlet (32), and the second separation outlet is in communication with a surge bin; the molded coal pre-powder removing system further comprises: A dust remover (40), wherein a first communication port (41) of the dust remover (40) is communicated with a second coal dust outlet (33) of the second separator (30), the second coal dust outlet (33) is communicated with the second separation cavity (31), so that the dust remover (40) provides air flow into the second separation cavity (31), the stirring cavity (11) and the first separation cavity (21), and a second communication port (42) of the dust remover (40) is communicated with a briquetting device; the molded coal pre-powder removing system further comprises: a wind speed regulating valve (60), wherein the wind speed regulating valve (60) is arranged on an air duct pipeline of the dust remover (40) communicated with the second separator (30); the gravity-free stirring device (10) comprises: The stirring device comprises a stirring cavity (11), a supporting partition plate (15), a first accommodating cavity (111) and a second accommodating cavity (112), wherein the supporting partition plate (15) is arranged in the stirring cavity (11) and divides the stirring cavity (11) into the first accommodating cavity (111) and the second accommodating cavity (112), a discharging communication port (151) is formed in the supporting partition plate (15), and the first accommodating cavity (111) is communicated with the second accommodating cavity (112) through the discharging communication port (151); The stirring assembly (16), the stirring assembly (16) is arranged in the first accommodating cavity (111), the molded coal inlet (12) is communicated with the first accommodating cavity (111), the molded coal subjected to the powder removal treatment enters the second accommodating cavity (112) through the discharging communication port (151), the molded coal outlet (13) is communicated with the second accommodating cavity (112), the molded coal enters the first separating cavity (21) through the molded coal outlet (13) and the first separating inlet (22), and the separated pulverized coal sequentially enters the second separating cavity (31) through the pulverized coal outlet (14) and the second separating inlet (32) under the action of airflow; the first separator (20) comprises: The cloth structure (25), the cloth structure (25) is arranged in the first separation cavity (21), the cloth structure (25) is conical, the cloth structure (25) is provided with a plurality of blanking ports (251) which are arranged at intervals, the caliber of each blanking port (251) is larger than the particle size of the molded coal, one blanking port (251) of the blanking ports (251) is positioned at the geometric center of the cloth structure (25), the rest blanking ports (251) are positioned at the outer periphery side of the blanking port (251) at the geometric center of the cloth structure (25), and the rest blanking ports (251) are circumferentially arranged at intervals around the cloth structure (25); The second separator (30) comprises a rotating separator.
2. 2. The briquette pre-threshing system of claim 1, wherein the stirring assembly (16) comprises: a rotation shaft (161), the rotation shaft (161) being rotatably provided within the first accommodation chamber (111); The stirring structures (162) are arranged on the rotating shaft (161) at intervals along the axial direction of the rotating shaft (161), a first included angle A is formed between two adjacent stirring structures (162) in the stirring structures (162), and the first included angle A is 30 degrees or more and 145 degrees or less.
3. 3. The pre-threshing system of molded coal as claimed in claim 2, wherein a plurality of said stirring structures (162) are arranged at equal intervals, and a distance between two adjacent stirring structures (162) is L1, wherein 20cm < L1 < 40cm.
4. 4. The briquette pre-threshing system of claim 2, wherein the stirring structure (162) includes: -a cylinder (1621), said cylinder (1621) being connected to said rotation shaft (161); The two trapezoid paddles (1622), the two trapezoid paddles (1622) are respectively arranged at two axial ends of the cylinder (1621), each trapezoid paddle (1622) and the rotating shaft (161) are respectively provided with a second included angle B, and the second included angle B is 30 degrees or more and less and is 45 degrees or less.
5. 5. The pre-threshing system of molded coal as recited in claim 4, characterized in that said cylinder (1621) is a hollow structure and/or said trapezoidal blade (1622) is a hollow structure.
6. 6. The pre-powder removing system for molded coal according to claim 2, wherein two rotation shafts (161) are arranged in parallel, a plurality of stirring structures (162) are arranged on each rotation shaft (161), two stirring structures (162) which are oppositely arranged at the same radial position on the two rotation shafts (161) are arranged with a first included angle a, the gravity-free stirring device (10) comprises at least two groups of discharge communication port groups, one group of discharge communication port groups comprises two discharge communication ports (151), the two discharge communication ports (151) are respectively arranged below the two rotation shafts (161), and the two discharge communication ports (151) in the same group are communicated with the molded coal outlet (13) through a Y-shaped communication pipe (80).
7. 7. The pre-de-dusting system of briquettes of claim 6, wherein the gravity-free stirring device (10) further comprises: The discharge port regulating valve (17), the discharge port regulating valve (17) is arranged in the second accommodating cavity (112) and is positioned on a communication pipeline between the discharge communication port (151) and the molded coal outlet (13).
8. 8. The moulded coal pre-dusting system according to claim 1, wherein the distance between the plane of the bottom of the cloth structure (25) and the bottom inner wall surface of the first separation chamber (21) is L2, wherein 40cm ∈l2 ∈50cm.
9. 9. The moulded coal pre-dusting system according to claim 1, wherein the communication line between the moulded coal outlet (13) and the first separation inlet (22) is arranged with a third angle C to the axial direction of the cloth structure (25), which third angle C satisfies 40 ° -C-60 °.
10. 10. A method for removing dust from a briquette pre-dust removal system, characterized in that it is used in a briquette pre-dust removal system according to any one of claims 1 to 9, said method comprising the steps of: Conveying the molded coal with the first particle size R1 pressed into a stirring cavity (11) through a molded coal inlet (12) of a gravity-free stirring device (10) at a preset speed V1, and stirring for a preset duration T1 to remove coal dust; Conveying the molded coal subjected to the powder removal treatment into a first separation cavity (21) through a molded coal outlet (13) and a first separation inlet (22) of a first separator (20) for preliminary separation operation, wherein the molded coal with a first particle size R1 is conveyed to a conveying device (50) through the first separation outlet of the first separator (20) so as to convey the molded coal subjected to the powder removal treatment to an oxidation and carbonization station through the conveying device (50); The pulverized coal with the second particle size R2 enters a second separation cavity (31) through a first pulverized coal outlet (24) of the first separator (20) and a second separation inlet (32) of the second separator (30); the pulverized coal with the third particle size R3 is recycled into the surge bin through a second separation outlet of the second separator (30).
11. 11. The method for removing powder according to claim 10, wherein, the powder removing method further comprises the following steps: The pulverized coal with the fourth particle size R4 enters the dust remover (40) through a second pulverized coal outlet (33) of the second separator (30) and a first communication port (41) of the dust remover (40), and is conveyed to the briquetting device through a second communication port (42) of the dust remover (40).
12. 12. The method for removing powder according to claim 10, wherein, The first particle diameter R1 is more than or equal to 8 meshes and less than or equal to 3 meshes; The preset speed V1 is 3t/h or more and V1 or less than or equal to 5t/h; The preset time length T1 is 0< T1 less than or equal to 30min; the second particle diameter R2 satisfies R2<8 mesh; The third grain diameter R3 is more than or equal to 30 meshes and less than or equal to 8 meshes.
13. 13. The method for removing powder according to claim 11, wherein, The fourth particle diameter R4 satisfies R4<30 meshes.

Description

Molded coal pre-powder removing system and powder removing method of molded coal pre-powder removing system Technical Field The invention relates to the technical field of coal dust processing and forming, in particular to a molded coal pre-threshing system and a threshing method of the molded coal pre-threshing system. Background In the process of preparing the activated carbon, the pulverized coal is firstly subjected to binder addition molding or non-binding briquetting molding technology to produce a molded coal crushed material with the strength of more than 90%, and then the molded coal crushed material is subjected to oxidation, carbonization, activation and other processes to prepare the required product. The molded coal crushed materials prepared by the existing pulverized coal molding technology are irregular in shape and more in corners, so that the surfaces are fragile, the powder removal rate in the oxygen and carbonization processes is high, but the pulverized coal generated in the carbonization process is hardly cohesive, is difficult to briquetting and molding again, cannot be recycled and can only be sold at low price, the obtaining rate of carbonized materials is greatly influenced, and a series of chain reactions such as reduction in the obtaining rate of final products, increase in production cost, improvement in product selling price, weakening of market competitiveness and the like are caused. Disclosure of Invention The invention mainly aims to provide a molded coal pre-threshing system and a threshing method of the molded coal pre-threshing system, so as to solve the problems that molded coal crushed materials in the prior art have higher threshing rate in the carbonization process and the shed coal dust cannot be recycled. In order to achieve the above object, according to one aspect of the present invention, there is provided a molded coal pre-threshing system for modifying molded coal before an oxidation and carbonization process to remove pulverized coal on the surface of the molded coal and recycle the pulverized coal, the molded coal pre-threshing system comprising a gravity-free stirring device, a first separator and a second separator, wherein the gravity-free stirring device has a stirring cavity, a molded coal inlet, a molded coal outlet and a pulverized coal outlet which are communicated with the stirring cavity, the first separator has a first separation cavity, a first separation inlet, a first separation outlet and a first pulverized coal outlet which are communicated with the first separation cavity, wherein the first separation inlet is communicated with the molded coal outlet, the first separation outlet is communicated with a conveying device to convey the pulverized coal subjected to the powder removal treatment to an oxidation and carbonization station, and the second separator has a second separation cavity, a second separation inlet and a second separation outlet which are communicated with the second separation cavity, wherein the pulverized coal outlet and the first pulverized coal outlet are both communicated with the second separation inlet, and the second separation outlet are communicated with a buffer bin. Further, the molded coal pre-powder removing system further comprises a dust remover, the first communication port of the dust remover is communicated with the second coal dust outlet of the second separator, and the second coal dust outlet is communicated with the second separation cavity, so that the dust remover provides air flow for the second separation cavity, the stirring cavity and the first separation cavity, and the second communication port of the dust remover is communicated with the briquetting device. Further, the molded coal pre-powder removing system further comprises a wind speed regulating valve, and the wind speed regulating valve is arranged on an air duct pipeline which is formed by communicating the dust remover with the second separator. Further, the gravity-free stirring device comprises a supporting baffle plate and a stirring assembly, wherein the supporting baffle plate is arranged in the stirring cavity and divides the stirring cavity into a first accommodating cavity and a second accommodating cavity, a discharging communication port is formed in the supporting baffle plate, the first accommodating cavity is communicated with the second accommodating cavity through the discharging communication port, the stirring assembly is arranged in the first accommodating cavity, a molded coal inlet is communicated with the first accommodating cavity, molded coal subjected to powder removal enters the second accommodating cavity through the discharging communication port, a molded coal outlet is communicated with the second accommodating cavity, molded coal enters the first separating cavity through a molded coal outlet and a first separating inlet, and shed pulverized coal sequentially enters the second separating cavity through a pulv