Calcium hydroxide raw material screening device

Abstract

The utility model relates to a calcium hydroxide raw material screening device which comprises a frame body, a feeding port is formed in the top of the frame body, the calcium hydroxide raw material screening device further comprises a screening channel arranged in the frame body, the screening channel is provided with an inlet in the top and an outlet in the bottom, the inlet is communicated with the feeding port, and the outlet extends out of the frame body. The whole sieving channel is of a spiral structure. Aiming at a linear inclined sieving channel in the prior art, the spiral sieving channel adopts a spiral structure, so that the length of a path is prolonged, and excessive space is not occupied.

Description

Technical Field

[0001] The utility model belongs to the technical field of calcium hydroxide processing, and particularly relates to a screening device for calcium hydroxide raw materials. Background Art

[0002] Calcium hydroxide, commonly known as slaked lime, is generally prepared by mixing calcined limestone with water. During the preparation process, it is necessary to screen the raw materials to ensure the fineness of the raw materials and meet the requirements of particle size.

[0003] In the prior art, the screening method generally uses a vibrating and inclined screen. Particles that meet the particle size can pass through the screen, while large-particle-size particles will flow out along the inclined direction of the screen to achieve screening. For example, in a Chinese patent with the application number "201822136386.5" and the name "An active lime screening device", it is recorded that: "A first screen and a second screen are arranged in the screening cavity. The first screen is located above the second screen, and both the first screen and the second screen are inclined."

[0004] However, for this inclined design, the path length of the raw material passing through often cannot meet the requirements, that is, the length of the screen is too short, and some small particles that meet the requirements will flow out with the large particles before they can pass through the screen. But if the length is continued to be extended, it will occupy too much space and is not conducive to layout. Summary of the Utility Model

[0005] Aiming at the technical problem that the path length of the straight inclined screening channel in the prior art cannot meet the screening requirements and is not easy to extend, the utility model provides a screening device for calcium hydroxide raw materials, and the specific technical solutions are as follows:

[0006] The screening device for calcium hydroxide raw materials includes a frame body. The top of the frame body has a feed inlet, and further includes a screening channel arranged in the frame body. The screening channel has an inlet at the top and an outlet at the bottom. The inlet is communicated with the feed inlet, and the outlet extends to the outside of the frame body. The screening channel is integrally in a spiral structure.

[0007] As a further technical solution of the utility model, the pitch of the screening channel is smaller than the axial length of the cross-section of the screening channel.

[0008] As a further technical solution of the utility model, the radial length of the screening channel increases or decreases from top to bottom, and the radial distance of the screening channel is greater than the radial length of the cross-section of the screening channel.

[0009] As a further technical solution of the utility model, the screening channel is a variable-pitch spiral.

[0010] As a further technical solution of the present utility model, in the cross-section of the sieving channel, a protrusion is provided in the middle of the bottom end of the sieving channel.

[0011] As a further technical solution of the present utility model, the whole of the sieving channel is hollowed out.

[0012] As a further technical solution of the present utility model, a discharge port is provided at the bottom of the frame body, a vibration motor is installed on the frame body, and an elastic member is connected to the bottom of the frame body, and a support member is connected below the elastic member.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) Aiming at the straight inclined sieving channel in the prior art, the present application adopts a spiral structure, which not only prolongs the length of the path but also does not occupy too much space.

[0015] (2) In the present application, the whole sieving channel is designed to be hollowed out, changing the traditional single-sided sieving, and allowing the raw materials to be sieved from any radial direction of the channel;

[0016] Moreover, the sieving channel is set as a "variable pitch spiral", which can force the raw materials not to jump and contact the inner and outer side walls of the sieving channel multiple times during transportation. In this way, the probability of small particles being sieved is increased, which is beneficial to sieving. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shows the internal structure schematic diagram of the calcium hydroxide raw material screening device;

[0018] Figure 2 Shows the structure schematic diagram of the sieving channel;

[0019] Figure 3 Shows the cross-sectional structure of the sieving channel.

[0020] LEGEND DESCRIPTION:

[0021] 100, frame body; 110, feed inlet; 120, discharge port; 130, vibration motor; 140, elastic member; 150, support member; 200, sieving channel; 210, inlet; 220, outlet; 230, protrusion. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments.

[0023] In view of the technical problem in the prior art that for an inclined raw material channel, the length of the path cannot meet the screening requirements and it is not convenient to extend, the present application proposes a screening channel with a conical spiral structure, which not only extends the length of the path but also does not occupy too much space.

[0024] Figure 1 The internal structure schematic diagram of the calcium hydroxide raw material screening device is shown; Figure 1 In the calcium hydroxide raw material screening device, it includes a frame 100, and the frame 100 has a feed inlet 110 at the top and a discharge outlet 120 at the bottom; the material is input from the feed inlet 110 at the top, and the qualified raw materials after screening are discharged from the discharge outlet 120; a vibration motor 130 is installed on the frame 100, and an elastic member 140 is connected to the bottom of the frame 100, and a support member 150 is connected below the elastic member 140; the support member 150 is placed on the bottom surface or installed on the table top, and the elastic member 140 is used to softly support the frame 100. When the vibration motor 130 is turned on, in cooperation with the soft support of the elastic member 140 for the frame 100, it can drive the frame 100 to vibrate.

[0025] Figure 2 The structure schematic diagram of the screening channel 200 is shown; the screening channel 200 is arranged in the frame 100. The screening channel 200 has an inlet 210 at the top and an outlet 220 at the bottom. The inlet 210 is communicated with the feed inlet 110, and the outlet 220 extends to the outside of the frame 100; the inlet 210 is connected to the feed inlet 110, and the raw materials entering from the feed inlet 110 can directly enter the screening channel 200 through the inlet 210 and are discharged from the outlet 220 after passing through the screening channel 200; the screening channel 200 is integrally in a spiral structure; making the screening channel 200 in a spiral structure can expand the path length of the raw materials flowing through within a certain space. In this way, it can avoid the phenomenon that some small particles flow out before they have time to be screened, and reduce the possibility of small particles being doped in the large particles flowing out; the radial length of the screening channel 200 increases or decreases from top to bottom, and the radial spacing of the screening channel 200 is greater than the radial length of the cross-section of the screening channel 200; for example, Figure 2Shows an increasing structure, that is, the screening channel 200 as a whole is in a conical state; and, since its radial spacing is greater than the radial length of its cross-section, there is no overlapping part on the horizontal projection plane of the screening channel 200, and the raw materials screened at any point on the screening channel 200 will not come into contact with the screening channel 200 again during the vertical falling process. In this way, it can avoid the re-entry of the already screened raw materials into the screening channel 200; the pitch of the screening channel 200 is less than the axial length of the cross-section of the screening channel 200; in this way, on the vertical projection plane, two adjacent cross-sections in the axial direction have an overlapping part on the horizontal plane, which can effectively limit the slope of the screening channel 200, slow down the flow rate of the raw materials, and at the same time shorten the overall axial length of the screening channel 200, reducing the space occupancy rate; the screening channel 200 is a variable-pitch helix; an equidistant helix means that "in one rotation period, the helix expands by the same distance, and such a helical curve is called an 'equidistant helix'. Using such a helical motion, the movement trajectory of the raw materials has a certain trajectory, and the centrifugal force and gravity exerted on the raw materials during transportation are traceable, and the transportation process is stable; while the 'variable-pitch helix' is a non-equidistant helix; it means that in one rotation period, the distance by which the helix expands is not the same, and it can increase, decrease, increase and decrease alternately, etc. The expansion distance of the helix is irregular. In this way, it can force the raw materials to come into contact with the end wall of the screening channel 200 many times during transportation. In this way, it increases the probability of small particles being screened, which is beneficial to screening.

[0026] Figure 3 Shows the cross-sectional structure of the screening channel 200; Figure 3 In it, on the cross-section of the screening channel 200, there is a protrusion 230 in the middle of the bottom end of the screening channel 200; the setting of the protrusion 230 can force the material to flow from the middle to both sides and contact the side walls more, thereby increasing the possibility of screening; the screening channel 200 is entirely hollow; changing the traditional single-sided screening allows screening in any radial direction of the channel, that is, the screening channel 200 is an integral conical spiral screen, which greatly improves the screening efficiency, and since there is no overlapping part on the horizontal projection plane of the screening channel 200, it can also avoid the backflow of the screened particles.

[0027] It should be noted that Figure 3 In it, the cross-section of the screening channel 200 shown in this drawing is rectangular, but this is not a limitation of this application. In some other embodiments, the cross-section of the screening channel 200 can also be any regular or irregular shape.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting it.

Claims

1. A calcium hydroxide raw material screening device, comprising a frame (100), wherein the top of the frame (100) is provided with a feed inlet (110), characterized in that: The invention also comprises a screening channel (200) arranged in the frame (100), wherein the screening channel (200) has an inlet (210) at the top and an outlet (220) at the bottom, wherein the inlet (210) is connected to the feed port (110), and the outlet (220) extends to the outside of the frame (100), and the screening channel (200) is a spiral structure as a whole.

2. The calcium hydroxide raw material screening device according to claim 1, characterized in that: The pitch of the screening channel (200) is smaller than the axial length of the cross section of the screening channel (200).

3. The calcium hydroxide raw material screening device according to claim 1 or 2, characterized in that: The radial length of the screening channel (200) increases or decreases from top to bottom, and the radial spacing of the screening channel (200) is greater than the radial length of the cross section of the screening channel (200).

4. The calcium hydroxide raw material screening device according to claim 3, characterized in that: The screening channel (200) is a spiral with different pitches.

5. The calcium hydroxide raw material screening device according to claim 3, characterized in that: In the cross section of the screening channel (200), a protrusion (230) is provided in the middle of the bottom end of the screening channel (200).

6. The calcium hydroxide raw material screening device according to claim 3, characterized in that: The screening channel (200) is hollowed out as a whole.

7. The calcium hydroxide raw material screening device according to claim 3, characterized in that: The frame (100) has a discharge port (120) at the bottom, a vibration motor (130) is installed on the frame (100), and an elastic member (140) is connected to the bottom of the frame (100), and a support member (150) is connected below the elastic member (140).

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