Air-pressure-type dual-bin air-powered separator

Abstract

The present invention comprises: a separation silo, a discharge silo, a upper sidewall of the separation silo communicated with the discharge silo through a communication port, wherein an air curtain is disposed in the communication port to isolate the silos from each other, a discharge port is disposed at the bottom of the discharge silo, a suction outlet is mounted on the top of the separation silo, a feeding port is disposed at the lower part of a sidewall of the separation silo, which is precisely facing towards the underside of the end of the belt conveyer, a vibration trough is arranged at the lower part of the separation silo, a damper plate is disposed underside thereof, an air inlet is located underbelly thereof at the bottom of the separation silo, a rejection outlet is installed at the underside end of the vibrating trough.

Claims

1. An apparatus for pneumatic separation, comprising: a separation silo, comprising: a first sidewall, a negative-pressure suction outlet disposed on the to of the separation silo, an air inlet disposed at the bottom of the separation silo, a vibration trough disposed in the separation silo and located above the air inlet, wherein the vibration trough has a rejection outlet installed at an underside end of the vibrating trough; a damper plate is disposed below the vibration trough and above the air inlet, and a feeding port disposed at the first sidewall and located above the vibration trough and below the negative-pressure suction outlet; a discharge silo, comprising: a second sidewall communicated with the first sidewall through a communication port, and a discharge port is disposed at the bottom of the discharge silo, wherein the apparatus further comprises a mesh belt conveyor passing through the communication port from the separation silo into the discharge silo, the feeding port is located below the mesh belt conveyor, and wherein an air curtain is formed in the communication port to isolate the discharge silo and the separation silo from each other.

2. The apparatus for pneumatic separating in accordance with claim 1, wherein the mesh belt conveyer is horizontally arranged in the separation silo and the discharge silo, an auxiliary air inlet is provided under the communication port, a series of air holes are disposed on the auxiliary air inlet and vertically facing the mesh belt conveyer to form the air curtain.

3. The apparatus for pneumatic separating in accordance with claim 1, wherein a pressure at the negative-pressure suction outlet is 100-2100Pa lower than a standard atmospheric pressure, a pressure at a mesh on the vibrating trough is 100-2000Pa higher than the standard atmospheric pressure, the air inlet is connected to the bottom of the damper plate and has a rectangular bending structure, a airflow direction of a horizontal section of the air inlet is consistent with a transferring direction of the mesh belt conveyer, and a pressure in the discharge silo is equal to the standard atmospheric pressure.

4. The apparatus of claim 2, Wherein the discharge silo has a trumpet shape of which an upper part is bigger than a lower part, tilt sidewalls of the discharge silo are provided with angle regulators, the damper plate is mounted beneath the mesh vibrating trough by a pull chute.

5. The apparatus of claim 2, wherein the mesh belt conveyer is equipped with corrective and tensioning means.

6. The apparatus of claim 2, wherein an end of the mesh belt conveyer located in the discharge silo is provided with a scratch brush.

7. The apparatus of claim 3, wherein the discharge silo has a trumpet shape of which an upper part is bigger than a lower part, tilt sidewalls of the discharge silo are provided with angle regulators, the damper plate is mounted beneath the mesh vibrating trough by a pull chute.

8. The apparatus of claim 3, wherein the mesh belt conveyer is equipped with corrective and tensioning means.

9. The apparatus of claim 3, wherein an end of the mesh belt conveyer located in the discharge silo is provided with a scratch brush.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) FIG. 1 is a structure view of the present invention.

(2) Legend: Air inlet 1; Damper plate 2; Mesh vibrating trough 3; Feeding port 4; Mesh belt conveyer 5; Suction outlet 6; Auxiliary air inlet 7; Scratch brush 8; Discharge port 9; Rejection outlet 10; Separation silo 11, Discharge silo 12.

DETAILED DESCRIPTION OF THE INVENTION

(3) FIG. 1 is a construct view of a preferred embodiment of the present invention, consisting of a air inlet 1, a damper plate 2, a mesh vibrating trough 3, a feeding port 4, a mesh belt conveyer 5, a suction outlet 6, an auxiliary air inlet 7 a rotary scratch brush 8, a discharge outlet 9, a rejection outlet 10 a separation silo 11, and a discharge silo 12.

(4) Operation process as shown, the material is transferred by vibrating conveyor from the feed port 4 (as fig.) into a separation silo 11 (as fig.), due to the inertia, makes the parabolic movement forward, during the moving process, wherein the fine dust and detritus, whose size is less than dimension of the mesh hole on the belt conveyer 5 (as fig.), infiltrate the mesh belt conveyer 5 (as fig.) into the dust exhaust system through the suction outlet 6 (as fig.); under the effect of negative pressure from the suction outlet 6 (as fig.), wherein a certain proportion of qualified material whose specific weight is light, is absorbed on the belt conveyer 5 (as fig.); wherein the remaining material, uplifted by wind of the positive pressure from air inlet 1 (as fig.), wherein the lighter material uplifted by positive pressure air is gradually separated from the heavier, and is absorbed on the belt conveyer 5 (as fig.) by passing through the pressure equilibrium plane of separation silo 11 (as fig.), wherein the remaining material falls on the vibrating trough 3 (as fig.), which are further loosen under the joint forces of vibrating transmission and the positive, so that wherein the lighter material is separated from the heavier once again, passes through the pressure equilibrium plane by uplifted by positive air, wherein the heavier material is transferred by the vibrating trough 3 (as fig.) and separated by falling to the rejection outlet 10, which is located on the underside thereof. The absorbed material on the belt conveyer 5 (as fig.) is taken into the discharge silo 12 (as fig.), due to the pressure in the discharge silo 12 (as fig.) same with outside atmospheric, therefore fall by gravity to the discharge port, the pneumatic separation is finally completed.

(5) Preferred Embodiment: This embodiment is just in an example of illustration on tobacco pneumatic separation, which does not limit the scope of the present. invention. After a resurgence of tobacco, feeding, storing leaves, heating humidification, cutting, and drying, the cutting tobacco is transported into the separation silo 11 (as fig.) of the present invention as illustrated, due to the inertia, makes the parabolic movement downward, during the falling process, wherein the tine dust and tobacco debris, whose size is less than 1 mm (as the size of mesh hole on the belt conveyer 5 (as fig.)), with the effect of negative pressure, infiltrate the mesh belt conveyer 5 (as fig.) into the dust exhaust system through the suction outlet 6 (as fig.); under the effect of negative pressure above, wherein a certain proportion of qualified cutting tobacco whose specific weight is light, is absorbed on the belt conveyer 5 (as fig.); wherein the remaining material in the falling process, uplifted by wind of the positive pressure, wherein the lighter cutting tobacco is gradually separated from the heavier, passes through the pressure equilibrium plane of the separation silo ii (as fig.), and is absorbed on the belt conveyer 5 (as fig.) by, wherein the remaining cutting tobacco and stems fall on the vibrating trough 3 (as fig.), the mixture is further loosen under the joint forces of vibrating trough 3 (as fig.) and the positive pressure air, so that wherein the lighter cut tobacco is separated from the heavier stems once again, passes through the pressure equilibrium plane by uplifted by positive pressure air, is absorbed by negative pressure on the belt conveyer 5 (as fig.), wherein the heavier stems are transferred by the vibrating trough 3 (as fig.) and separated by falling to the rejection outlet 10. The absorbed cutting tobacco on the belt conveyer 5 (as fig.) is taken into the discharge silo 12 (as fig.), due to the pressure in the discharge silo 12 (as fig.) same with outside atmospheric, fall by gravity to the discharge port 9 (as fig.), which is transported by belt conveyer into the next process. The technical tasks of sorting, the stems out of the cutting tobacco are finally completed. Testing with the same batch of cutting tobacco is conducted to compare the subject invention with a traditional flexible air sorting device, the main technical indicators as the following:

(6) TABLE-US-00001 Cut rag processed Cut rag by a flexible processed by air sorting the present Test items device invention Difference Ratio of cut rag 13 0.4 0.9 to stem (%) Ratio of long 60.4 62.1 −1.7 cutting tobacco (%) Ratio of 25.3 24.7 0.6 medium size cutting tobacco (%) Ratio of short 13.6 12.9 0.7 cutting tobacco (%) Ratio of 0.7 0.3 0.4 detritus (%) Moisture 0.6 0.2 0.4 reduction (%)

(7) Test results indicate that the present invention has achieved the multiple separations of materials in a single device, has the advantages of low energy consumption, high efficiency, less material crushed, and less moisture loss.