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CN-122007019-A - Clean molded coal finished product dust purification screening device and method

CN122007019ACN 122007019 ACN122007019 ACN 122007019ACN-122007019-A

Abstract

The application relates to the technical field of clean briquette production equipment, in particular to a dust purifying and screening device and method for a clean briquette finished product, which comprises a sleeve, wherein a conveying belt is arranged in the sleeve and is used for conveying clean coal, the sleeve consists of fixed sections at two ends and a rotating section in the middle, the rotating section is in running fit with the two fixed sections, a negative pressure dust-raising piece is arranged on the rotating section, the dust-raising piece is arranged on the inner side of the rotating section and raises pulverized coal dust on the conveying belt through airflow disturbance, a negative pressure dust collector is used for absorbing and collecting raised dust, and the negative pressure dust collector comprises a plurality of dust suction hoppers arranged on the rotating section.

Inventors

  • SUN CHENGBO
  • Sun Chengtai
  • GAO QINGGUO

Assignees

  • 莘县蓝火新能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260326

Claims (9)

  1. 1. The dust purification and screening device for the clean molded coal finished products comprises a sleeve (1) and is characterized in that a conveying belt (2) is arranged in the sleeve (1), the conveying belt (2) is used for conveying clean coal, the sleeve (1) consists of two fixed sections (11) at two ends and a middle rotating section (12), and the rotating section (12) is in running fit with the two fixed sections (11); The rotary section (12) is provided with a negative pressure dust collector (3), the inner side of the rotary section (12) is provided with a dust raising piece (5), the dust raising piece (5) raises pulverized coal dust on the conveying belt (2) through air flow disturbance, and the negative pressure dust collector (3) adsorbs and collects the raised dust; The negative pressure dust collector (3) comprises a plurality of dust collection hoppers (31) arranged on the rotary section (12), dust collection ends of the dust collection hoppers (31) are embedded in the rotary section (12) and face the conveying belt (2), conveying pipes (32) are arranged at one ends of the dust collection hoppers (31), and the dust collection hoppers (31) and dust raising pieces (5) are uniformly distributed on the rotary section (12) in the circumferential direction.
  2. 2. The dust purification and screening device for clean molded coal products according to claim 1 is characterized in that a supporting ring (4) is arranged on a fixing section (11) at one side; the support ring (4) comprises a fixing part (41) connected with the fixing section (11), a swivel (42) is rotatably arranged on one side of the fixing part (41), and one end of the conveying pipe (32) penetrates through the swivel (42) and extends into the fixing part (41); The fixing part (41) is provided with an air suction hole (43).
  3. 3. The cleaning and screening device for dust of clean molded coal products according to claim 1, wherein the dust collection hopper (31) is provided with a grid (44), and the grid (44) is used for preventing large-particle coal blocks from entering the dust collection hopper (31) and preventing the dust collection hopper (31) from being blocked.
  4. 4. The dust purification and screening device for clean molded coal products according to claim 1, wherein the dust raising member (5) comprises an air duct (51) arranged on the inner side of the rotary section (12), a plurality of jet heads (52) facing the conveyor belt (2) are arranged on the air duct (51), and the jet heads (52) are used for jetting air flow to the conveyor belt (2) to raise dust attached to the surface of molded coal.
  5. 5. The dust purification and screening device for clean molded coal products according to claim 4, wherein a connecting ring (6) is arranged in the fixing section (11); The connecting ring (6) comprises a fixed ring (61) arranged in the fixed section (11), one end of the fixed ring (61) is provided with a rotating ring (62) which is arranged in a rotating way, and one end of the air duct (51) is communicated with the inside of the fixed ring (61) after penetrating through the rotating ring (62); An air inlet pipe (63) is arranged on the fixed ring (61).
  6. 6. The dust purification and screening device for clean molded coal finished products according to claim 1, wherein a plurality of circumferentially distributed sweeping brushes (64) are arranged in the rotating section (12), the sweeping brushes (64) extend to the conveying belt (2), and flexible vertical curtains (65) are arranged at two ends of the two fixing sections (11).
  7. 7. The dust purification and screening device for clean molded coal finished products according to claim 1, wherein a gear ring (66) is arranged on the rotating section (12), a driving gear (67) meshed with the gear ring (66) is rotatably arranged on the fixed section (11), and the driving gear (67) is used for driving the rotating section (12) to rotate relative to the fixed section (11).
  8. 8. The dust purification and screening device for the clean molded coal finished products, as set forth in claim 1, is characterized in that the conveying belt (2) is of a V-shaped structure with a low middle and high two sides, and a plurality of through holes (21) which are uniformly distributed are formed in the conveying belt (2).
  9. 9. A dust cleaning and screening method using a cleaning briquette dust cleaning and screening apparatus according to any one of claims 1 to 8, comprising the steps of: The device comprises a sleeve (1), a material conveying device, a starting device, a V-shaped structure, an external compressed air source and negative pressure equipment, wherein a clean molded coal finished product enters the V-shaped conveying belt (2) in the sleeve (1) and is gathered in the middle to be stably conveyed by the V-shaped structure; S2, air flow supply, rotation section (12) rotates relative to fixed section (11) to drive air duct (51), jet head (52) and dust suction hopper (31) to rotate synchronously and circumferentially, external compressed air enters air duct (51) through air inlet pipe (63), fixed ring (61) and rotating ring (62), negative pressure is transmitted to dust suction hopper (31) through air suction hole (43), fixed part (41) and rotating ring (42); S3, suspending dust, wherein the jet head (52) jets directional air flow to the surface of the finished coal product, and simultaneously the air flow passes through the through hole (21) of the conveying belt (2) to blow the finished coal product from below to form bidirectional air flow disturbance, so that dust on all parts of the finished coal product and the surface of the conveying belt (2) is thoroughly raised to be in a suspended state; S4, outputting finished products, sealing the sleeve (1) by flexible vertical curtains (65) at two ends of the sleeve (1) to prevent dust from overflowing, and continuously conveying the clean molded coal finished products subjected to dust purification along with the conveying belt (2).

Description

Clean molded coal finished product dust purification screening device and method Technical Field The application relates to the technical field of clean briquette production equipment, in particular to a clean briquette finished product dust purifying and screening device and method. Background The clean briquette dust is fine solid particles produced by crushing clean coal, adhesive, sulfur-fixing agent, combustion improver, etc. in the production, storage, etc. of sieving, conveying, transferring, piling, etc. The dust mainly comprises fine coal dust particles, an unconsolidated binder and sulfur-fixing agent powder. A dust purification and screening method for clean briquette finished products is characterized in that coal dust, auxiliary material fine powder and fine particles generated in the classification and screening process of the clean briquette finished products are subjected to integrated process of centralized collection and purification treatment in a sealing collection, negative pressure suction, multistage dust removal and other modes while finished product particle size classification and impurity separation are completed, a coal conveyor dust purification device with the application number of 2015102150703 is used for purifying dust in the coal conveyor conveying process, comprises a coal dropping pipe connected with a coal mill and positioned above a conveyor belt, a steam spray head connected with a steam treatment device is arranged on the coal dropping pipe, a dust removing cover is further arranged on the top surface of the dust removing cover along the movement direction of the conveyor belt, a dust removing box is further arranged on the other side of the coal dropping pipe, a steam spray head is arranged on the top cover of the dust removing box, and waste heat steam is utilized for purifying dust, so that pollution of the dust is reduced, and loss of the coal is reduced. However, in the prior art, waste heat steam generated by a boiler or other equipment is used as a dedusting medium when dust of a coal finished product is purified, and the coal dust is uniformly humidified in the falling and conveying processes of the coal dust, so that dust flying is inhibited, the clean molded coal finished product contains components such as a binder, a sulfur fixing agent and the like, is easily softened when meeting moisture of steam or moisture, and falls off and agglomerating on the surface layer, so that the strength and the yield of the molded coal are reduced, screen blockage and conveying clamping stagnation are caused, and production faults are aggravated. In the prior art, dust flying is inhibited by humidification, generated dust-containing gas is not captured, filtered and purified, fine dust still overflows along with air flow, standard emission cannot be achieved, and environmental protection requirements are difficult to meet. Based on this, in the statement of the above point of view, the prior art way of dust cleaning of finished coal products still has room for improvement. Disclosure of Invention In order to solve the technical problems, the application provides a cleaning and screening device and a cleaning and screening method for dust of a clean briquette finished product, which adopt the following technical scheme: In the first aspect, the dust purification screening device for the clean molded coal finished products comprises a sleeve, wherein a conveying belt is arranged in the sleeve and used for conveying the clean coal, the sleeve consists of fixed sections at two ends and a rotary section in the middle, and the rotary section is in rotary fit with the two fixed sections; The inner side of the rotating section is provided with a dust raising piece, the dust raising piece raises pulverized coal dust on the conveying belt through air flow disturbance, and the negative pressure dust collector adsorbs and collects the raised dust; the negative pressure dust collector comprises a plurality of dust collection hoppers arranged on the rotating section, dust collection ends of the dust collection hoppers are embedded in the rotating section and face to the conveying belt, one ends of the dust collection hoppers are provided with conveying pipes, and the dust collection hoppers and dust raising pieces are uniformly distributed on the rotating section in the circumferential direction. Preferably, a support ring is arranged on the fixed section on one side; the support ring comprises a fixed part connected with the fixed section, one side of the fixed part is rotatably provided with a swivel, and one end of the conveying pipe penetrates through the swivel and extends into the fixed part; The fixing part is provided with an air suction hole. Preferably, the dust collection hopper is provided with a grid which is used for preventing large-particle coal blocks from entering the dust collection hopper and preventing the dust collection hopper from being blocked. Preferably, the du