Discharging device of cyclone separator

Abstract

The discharging device comprises the cyclone separator, the cyclone separator is provided with an air inlet end, a discharge pipe and an ash bucket, a filter is installed on the discharge pipe, a filter screen is arranged in the filter, a powder suction pipe extending to the top of the filter screen is installed on one side of the filter, the other end of the powder suction pipe is connected with a venturi pipe, and the other end of the venturi pipe is connected with the ash bucket. A fluid pipeline is arranged at a fluid inlet of the Venturi tube, and a powder feeding pipeline is arranged at the powder-containing output end of the Venturi tube. According to the discharging device of the cyclone separator, powder at the bottom of the ash hopper is conveyed through the ejector, the filter is additionally arranged on the discharging pipe, the filter is cleaned through the Venturi pipe, and the problem that the powder is discharged due to the fact that the airflow velocity of the cyclone separator is floating is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of a discharging device of a cyclone separator for polypropylene recovery. Background Art

[0002] The original process design used a powder injector as the discharge device of the cyclone separator in the third reactor, the purpose of which was to return the powder collected by the cyclone separator to the third reactor. If the powder could not be collected, the operation of the entire production line would be affected, resulting in shutdown.

[0003] At present, the main reason why the powder separated by the cyclone separator cannot be collected normally is that the discharge of the cyclone separator is through an ejector. If the conveying pipeline is too long or has bends, it is easy to cause blockage, resulting in the powder cannot be collected normally. Process adjustments and production load fluctuations will cause the shape and quantity of particles collected by the cyclone separator to change, thereby changing the operating conditions of the cyclone separator. The inlet flow rate of the cyclone separator fluctuates, causing part of the powder to be discharged through the exhaust channel and the recovery amount to decrease. For this reason, technical improvements are made to the existing technology. Utility Model Content

[0004] The purpose of the utility model is to provide a discharging device for a cyclone separator to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A discharging device for a cyclone separator comprises a cyclone separator, wherein the cyclone separator is provided with an air inlet end, a discharge pipe and an ash hopper, a filter is installed on the discharge pipe, a filter screen is built into the filter, a powder suction pipe extending to the top of the filter screen is installed on one side of the filter, the other end of the powder suction pipe is connected to a venturi tube, a fluid pipeline is provided at the fluid inlet of the venturi tube, and a powder delivery pipeline is provided at the powder-containing output end of the venturi tube.

[0007] As a further solution of the utility model: an ejector is installed at the bottom of the ash hopper, and the powder in the ash hopper is ejected through the ejector, and the ejector is connected with the powder delivery pipeline through the injection delivery pipeline.

[0008] As a further solution of the utility model: the filter screen is in a hemispherical shape, with a downward concave arc that is convenient for dust concentration, the output side of the filter is connected to the gas output pipeline, and the gas output pipeline is maintained in a negative pressure state.

[0009] As a further solution of the utility model: the filter comprises an upper tube body and a lower tube body, a filter screen is installed between the upper tube body and the lower tube body, and the upper tube body and the lower tube body are connected and fixed by bolts.

[0010] As a further solution of the utility model: a fluid control valve is arranged on the fluid pipeline, and a gate valve is arranged on the powder delivery pipeline to prevent the injection conveying pipeline from backwashing dust into the powder delivery pipeline.

[0011] As a further solution of the utility model: the powder delivery pipeline is arranged vertically downward, and the injection conveying pipeline blows the powder into the powder delivery pipeline through the injector.

[0012] As a further solution of the utility model: the powder delivery pipeline is connected to the air inlet end through a reflux pipeline, and a control valve is installed on the reflux pipeline.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The discharging device of the cyclone separator conveys the powder at the bottom of the ash hopper through an ejector, and a filter is installed in the discharge pipe, and the filter is cleaned by a venturi tube, so as to solve the problem that the air flow velocity of the cyclone separator fluctuates and causes the powder to be discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a discharging device of a cyclone separator;

[0016] Figure 2 The present invention is a schematic diagram of the structure of a filter in a discharging device of a cyclone separator.

[0017] In the figure: 1. Cyclone separator; 2. Air inlet end; 3. Discharge pipe; 4. Ash hopper; 5. Ejector; 6. Filter; 7. Air output pipeline; 8. Powder suction pipe; 9. Venturi tube; 10. Fluid control valve; 11. Fluid pipeline; 12. Powder delivery pipeline; 13. Gate valve; 14. Injection delivery pipeline; 15. Filter. DETAILED DESCRIPTION

[0018] See also Figure 1 and 2In the embodiment of the utility model, a discharging device of a cyclone separator comprises a cyclone separator 1, the cyclone separator 1 is provided with an air inlet end 2, a discharge pipe 3 and an ash hopper 4, a filter 6 is installed on the discharge pipe 3, a filter screen 15 is built in the filter 6, a powder suction pipe 8 extending to the top of the filter screen 15 is installed on one side of the filter 6, the other end of the powder suction pipe 8 is connected to the venturi tube 9, a fluid pipeline 11 is arranged at the fluid inlet of the venturi tube 9, a powder delivery pipeline 12 is arranged at the powder-containing output end of the venturi tube 9, the air flow is discharged through the discharge pipe 3, the filter 6 and the air output pipeline 7 in sequence, and the powder will be discharged when passing through the filter screen 15 in the filter 6, In order to achieve the recovery of powder and the unblocked flow of filter 6, a venturi tube 9 is installed to accelerate the gas flow rate by changing the air flow from coarse to fine. When compressed air enters from the inlet of the venturi tube, a small amount of air is discharged through a nozzle with a very small cross-section, resulting in a decrease in pressure near the nozzle and an increase in flow rate. Such changes in pressure and flow rate form a "vacuum" area on the rear side of the venturi outlet, thereby sucking in the powder on the filter screen 15 and sending it to the powder delivery pipeline 12 for recovery. There is no need for frequent manual cleaning, and part of the powder will not be discharged through the exhaust channel due to the fluctuation of the inlet flow rate input by the cyclone separator 1, resulting in a decrease in the recovery amount.

[0019] In a preferred embodiment, an injector 5 is installed at the bottom of the ash hopper 4, and the powder in the ash hopper 4 is sprayed out through the injector 5. The injector 5 is connected with the powder delivery pipeline 12 through the injection conveying pipeline 14. The injector 5 delivers the powder into the powder delivery pipeline 12. The air flow velocity inside the powder delivery pipeline 12 is fast, which further improves the powder delivery efficiency and avoids blockage.

[0020] In a preferred embodiment, the filter screen 15 is hemispherical in shape and has a downward concave arc that facilitates dust concentration. The output side of the filter 6 is connected to the gas output pipeline 7, and a negative pressure state is maintained in the gas output pipeline 7. The bottom of the gas output pipeline 7 can be equipped with a fan or an air pump to achieve a negative pressure state in the gas output pipeline 7, thereby improving the efficiency of the airflow. The hemispherical filter screen 15 allows the powder to gather to the bottom of the powder suction pipe 8 under the action of gravity and airflow.

[0021] In a preferred embodiment, the filter 6 includes an upper tube body and a lower tube body, a filter screen 15 is installed between the upper tube body and the lower tube body, the upper tube body and the lower tube body are fixed together by bolts, the filter screen 15 can be disassembled and replaced through the bolt fixing structure of the upper tube body and the lower tube body, and adding a gasket can improve the sealing of the pipeline.

[0022] In a preferred embodiment, a fluid control valve 10 is provided on the fluid pipeline 11, and a gate valve 13 is provided on the powder delivery pipeline 12 to prevent the injection delivery pipeline 14 from backwashing dust into the powder delivery pipeline 12. The fluid control valve 10 and the gate valve 13 can be controlled by the terminal to operate intermittently. When the air intake amount at the air intake end 2 is large, the control valve 10 and the gate valve 13 are selected for operation. When the air intake amount at the air intake end 2 is small, the air flow velocity inside the cyclone separator 1 is slow, so the amount of powder discharged through the discharge pipe 3 is small, and intermittent operation of ten to thirty minutes is sufficient to meet the powder cleaning needs.

[0023] In a preferred embodiment, the powder delivery pipeline 12 is arranged vertically downward, and the injection conveying pipeline 14 blows the powder into the powder delivery pipeline 12 through the injector 5. The powder delivery pipeline 12 is connected to the air inlet end 2 through the reflux pipeline 16. The reflux pipeline 16 is equipped with a control valve. The cyclone separator 1 separates the material into polypropylene particles of different sizes, including ultrafine particles; the injector 5 and the fluid pipeline 11 inlet fluid come from the propylene gas flow of the reactor. If the equipment is used in other separation fields, a certain amount of waste gas will be inhaled in addition to the powder when the venturi tube 9 is operating. If the waste gas cannot be directly discharged or used for recovery, a reflux pipeline 16 needs to be installed to send the filtered material and the inhaled waste gas back to the cyclone separator 1 for reciprocation.

[0024] It should be noted that the above embodiments all belong to the same utility model concept, and the description of each embodiment has its own focus. For matters that are not described in detail in some embodiments, reference can be made to the description in other embodiments.

[0025] The above-mentioned embodiments only express the implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A cyclone separator discharging device, comprising a cyclone separator (1), the cyclone separator (1) being provided with an air inlet end (2), a discharge pipe (3) and an ash hopper (4), characterized in that: The discharge pipe (3) is provided with a filter (6), the filter (6) having a built-in filter screen (15), a powder suction pipe (8) extending to the top of the filter screen (15) is provided on one side of the filter (6), the other end of the powder suction pipe (8) is connected to the venturi tube (9), a fluid pipeline (11) is provided at the fluid inlet of the venturi tube (9), and a powder delivery pipeline (12) is provided at the powder-containing output end of the venturi tube (9).

2. The discharging device of a cyclone separator according to claim 1, characterized in that: An ejector (5) is installed at the bottom of the ash hopper (4), and the powder in the ash hopper (4) is ejected through the ejector (5). The ejector (5) is connected to the powder delivery pipeline (12) through the ejection delivery pipeline (14).

3. The discharging device of a cyclone separator according to claim 1, characterized in that: The filter screen (15) is in a hemispherical shape and has a downwardly concave arc that facilitates dust collection. The output side of the filter (6) is connected to the gas output pipeline (7), and a negative pressure state is maintained in the gas output pipeline (7).

4. The discharging device of a cyclone separator according to claim 3, characterized in that: The filter (6) comprises an upper tube body and a lower tube body, a filter screen (15) is installed between the upper tube body and the lower tube body, and the upper tube body and the lower tube body are connected and fixed by bolts.

5. The discharging device of a cyclone separator according to claim 2, characterized in that: The fluid pipeline (11) is provided with a fluid control valve (10), and the powder delivery pipeline (12) is provided with a gate valve (13) for preventing the injection delivery pipeline (14) from backwashing dust into the powder delivery pipeline (12).

6. The discharging device of a cyclone separator according to claim 2, characterized in that: The powder delivery pipeline (12) is arranged vertically downward, and the injection conveying pipeline (14) blows powder into the powder delivery pipeline (12) through the injector (5).

7. The discharging device of a cyclone separator according to claim 1, characterized in that: The powder delivery pipeline (12) is connected to the air inlet end (2) via a return pipeline (16), and a control valve is installed on the return pipeline (16).

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