Multi-stage powder concentrator

Abstract

The utility model discloses a multistage powder concentrator which comprises a first-stage screening part, second-stage screening parts, a third-stage screening part and a discharging hopper, the bottom of the first-stage screening part is installed on the third-stage screening part, the second-stage screening parts are installed on the periphery of the third-stage screening part, the first-stage screening part is located in an annular ring formed by all the second-stage screening parts, and the discharging hopper is located in the annular ring. The tops of all the second-stage screening parts are connected through an air duct, an air outlet pipe is arranged on the lower portion of the first-stage screening part and connected with an inlet of the air duct through a first induced draft fan, the discharging hopper is connected to the bottom face of the third-stage screening part, and the bottom of the discharging hopper is connected with a second induced draft fan through a pipeline. And through multi-stage screening, the material screening efficiency and effect are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of powder separators, in particular to a multi-stage powder separator. Background Technique

[0002] The powder separator is widely used in the coal mill raw material intermediate discharge drying mill and the cement mill system in the new dry process cement production line, and can be divided into three categories: three-separation powder separator, centrifugal powder separator, and cyclone powder separator.

[0003] However, the current powder separator has the following problems: after passing through the cyclone mechanism, the large-particle materials are directly discharged, while the fine powder is directly sent into the fan cyclone cylinder and then the fine powder is discharged. The fine powder cannot be multi-stage sieved again, resulting in poor sieving effect. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a multi-stage powder separator to solve the problems mentioned in the above background technique.

[0005] To solve the above technical problems, the utility model provides the following technical solutions:

[0006] A multi-stage powder separator includes a primary screening part, a secondary screening part, a tertiary screening part and a feeding hopper. The bottom of the primary screening part is installed on the tertiary screening part, the secondary screening part is installed on the periphery of the tertiary screening part, the primary screening part is located within the annular circle formed by all the secondary screening parts, the tops of all the secondary screening parts are connected by an air duct, an air outlet pipe is provided at the lower part of the primary screening part, and the air outlet pipe and the inlet of the air duct are connected by a first induced draft fan. The feeding hopper is connected to the bottom surface of the tertiary screening part, and the bottom of the feeding hopper is connected to a second induced draft fan through a pipeline.

[0007] Preferably, the primary screening part includes a housing, an upper cover installed on the top of the housing, a screening body rotatably connected to the upper cover. The air outlet pipe is installed at the lower part of the housing and is located below the screening body. The screening body is located within the housing. A discharge hopper connected to the housing is provided below the screening body. The discharge hopper is located within the feeding hopper. The lower end of the discharge hopper is connected to a discharge pipe, and the discharge pipe passes through one side of the feeding hopper.

[0008] Preferably, the secondary screening part includes a screening barrel and a first stirring mechanism installed horizontally within the screening barrel. The first stirring mechanism includes a first motor installed on the screening barrel, a first stirring shaft connected to the first motor through a coupling, and a plurality of first paddle blades connected to the first stirring shaft. The top of the screening barrel is connected to the air duct.

[0009] Preferably, the tertiary screening section includes a barrel body, a second stirring mechanism installed horizontally inside the barrel body, a step connected to the inner wall of the barrel body, and a fine-mesh filter plate arranged on the step. The second stirring mechanism includes a second motor installed on the barrel body, a second stirring shaft connected to the second motor through a coupling, and a plurality of second paddle blades connected to the second stirring shaft. The fine-mesh filter plate is located below the second stirring mechanism. The bottom of the screening barrel is connected to the barrel body, and the housing is installed on the barrel body.

[0010] Preferably, a maintenance door is provided on the barrel body, and the fine-mesh filter plate can be drawn out from the maintenance door.

[0011] Compared with the prior art, the present utility model has the following beneficial effects:

[0012] The material is initially screened by the primary screening section. The large-particle material is discharged through the discharge hopper, and the fine-particle material is led by the first induced draft fan to the secondary screening section for secondary screening. Then, the material is sent to the tertiary screening section by the secondary screening section for final screening, so as to obtain fine powder. That is, through multi-stage screening, the efficiency and effect of material screening are greatly improved, and thus finer material can be obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a cross-sectional view of the present utility model;

[0015] In the figure: 1 - primary screening section, 101 - housing, 102 - upper cover, 103 - screening body, 104 - discharge hopper, 105 - discharge pipe, 2 - secondary screening section, 201 - screening barrel, 202 - first stirring mechanism, 3 - tertiary screening section, 301 - barrel body, 302 - second stirring mechanism, 303 - step, 304 - fine-mesh filter plate, 305 - maintenance door, 4 - feeding hopper, 5 - air duct, 6 - air outlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0017] Embodiment 1

[0018] Please refer to Figure 1 and Figure 2, a multi-stage classifier, comprising a primary screening section 1, a secondary screening section 2, a tertiary screening section 3 and a feeding hopper 4. The primary screening section 1 includes a housing 101, an upper cover 102 installed at the top of the housing, and a screening body 103 rotatably connected to the upper cover. An air outlet pipe 6 is installed at the lower part of the housing 101, and the air outlet pipe 6 is located below the screening body 103. The screening body 103 is located inside the housing 101. A discharge hopper 104 connected to the housing is provided below the screening body 103. The lower end of the discharge hopper 104 is connected to a discharge pipe 105. The discharge hopper 104 is located inside the feeding hopper 4, and the discharge pipe 105 passes through one side of the feeding hopper 4. Among them, the screening body 103 is a prior art, and reference can be made to the utility model patent (publication number: CN218982333U) already owned by the applicant, a dew-proof combined double-rotor classifier disclosed therein. The screening body 103 described in this application includes a speed-regulating motor, an upper rotor, a material spreading disc, a drip device, etc. in the patent. Its structure and principle can be learned from the patent, so it will not be described in detail in this application.

[0019] The secondary screening section 2 includes a screening barrel 201 and a first stirring mechanism 202 installed horizontally inside the screening barrel. The first stirring mechanism 202 includes a first motor installed on the screening barrel, a first stirring shaft connected to the first motor through a coupling, and a plurality of first paddle blades connected to the first stirring shaft. An air duct 5 is connected to the top of the screening barrel 201. When the first motor works, it drives the first stirring shaft to rotate, which can stir the materials in the screening barrel. At the same time, the first paddle blades can further crush the materials.

[0020] The tertiary screening section 3 includes a barrel body 301, a second stirring mechanism 302 installed horizontally inside the barrel body, a step 303 connected to the inner wall of the barrel body, and a fine-mesh filter plate 304 arranged on the step. The second stirring mechanism includes a second motor installed on the barrel body, a second stirring shaft connected to the second motor through a coupling, and a plurality of second paddle blades connected to the second stirring shaft. The fine-mesh filter plate 304 is located below the second stirring mechanism 302. The housing 101 is installed on the barrel body 301. The bottom of the screening barrel 201 is connected to the barrel body 301, and the screening barrel 201 is located outside the housing. When the second motor works, it drives the second stirring shaft to rotate, which can prevent the fine-mesh filter plate from being blocked. At the same time, the second paddle blades can also finally crush the materials, and the materials are finally filtered through the fine-mesh filter plate to obtain fine powder.

[0021] The air outlet pipe 6 is connected to the inlet of the air duct 5 through a first induced draft fan (not shown in the drawings). The feeding hopper 4 is connected to the bottom surface of the tertiary screening section 3. The bottom of the feeding hopper 4 is connected to a second induced draft fan (not shown in the drawings) through a pipeline. The materials in the primary screening section are sucked into the air duct by the first induced draft fan, enter the secondary screening section and then enter the tertiary screening section, and finally are discharged from the feeding hopper 4. Through the action of the second induced draft fan, the fine powder can be sucked out to improve the discharging efficiency.

[0022] Example 2

[0023] On the basis of Embodiment 1, a maintenance door 305 is provided on the barrel body 301, and the fine-mesh filter plate 304 can be drawn out from the maintenance door 305. After the fine-mesh filter plate is blocked, the maintenance door 305 is opened, and the fine-mesh filter plate 304 can be taken out or replaced.

[0024] It should be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the presence of additional identical elements in the process, method, article or device including the said element.

[0025] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A multi-stage powder classifier, characterized in that: The invention comprises a primary screening part (1), a secondary screening part (2), a tertiary screening part (3) and a lower hopper (4), wherein the bottom of the primary screening part (1) is mounted on the tertiary screening part (3), the secondary screening part (2) is mounted on the periphery of the tertiary screening part (3), the primary screening part (1) is located in an annular ring formed by all the secondary screening parts (2), the tops of all the secondary screening parts (2) are connected via an air duct (5), an air outlet pipe (6) is provided at the bottom of the primary screening part (1), the air outlet pipe (6) is connected to the inlet of the air duct (5) via a first induced draft fan, the lower hopper (4) is connected to the bottom surface of the tertiary screening part (3), and the bottom of the lower hopper (4) is connected to the second induced draft fan via a pipeline.

2. A multi-stage powder classifier according to claim 1, characterized in that: The primary screening part (1) comprises a shell (101), an upper cover (102) mounted on the top of the shell, and a screening body (103) rotatably connected to the upper cover; an air outlet pipe (6) is mounted on the lower part of the shell (101), and the air outlet pipe (6) is located below the screening body (103); the screening body (103) is located in the shell (101); a discharge hopper (104) connected to the shell is provided below the screening body (103); the discharge hopper (104) is located in the lower hopper (4); a discharge pipe (105) is connected to the lower end of the discharge hopper (104), and the discharge pipe (105) passes through one side of the lower hopper (4).

3. A multi-stage powder classifier according to claim 2, characterized in that: The secondary screening section (2) comprises a screening barrel (201), a first stirring mechanism (202) installed in the screening barrel and arranged horizontally, the first stirring mechanism comprising a first motor installed on the screening barrel, a first stirring shaft connected to the first motor via a coupling, and a plurality of first paddles connected to the first stirring shaft, and the top of the screening barrel (201) is connected to the air duct (5).

4. A multi-stage powder classifier according to claim 3, characterized in that: The three-stage screening section (3) comprises a barrel body (301), a second stirring mechanism (302) installed in the barrel body and in a horizontal direction, a step (303) connected to the inner wall of the barrel body, and a fine-mesh filter plate (304) arranged on the step, the second stirring mechanism comprises a second motor installed on the barrel body, a second stirring shaft connected to the second motor through a coupling, and a plurality of second blades connected to the second stirring shaft, the fine-mesh filter plate (304) is located below the second stirring mechanism (302), the bottom of the screening barrel (201) is connected to the barrel body (301), and the housing (101) is installed on the barrel body (301).

5. A multi-stage powder classifier according to claim 4, characterized in that: The barrel body (301) is provided with an inspection door (305), and the fine-mesh filter plate (304) can be pulled out from the inspection door (305).

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