Wind energy-saving type chlorinated polyethylene drying, separating and returning system

Abstract

The utility model discloses a wind energy-saving type chlorinated polyethylene drying, separating and returning system which comprises a dryer and a cyclone separator, an air inlet is formed in the bottom of the dryer, an air outlet is formed in the top of the dryer, and the air outlet is communicated with an inner cavity of the cyclone separator; a material returning valve is mounted at the bottom of the cyclone separator; a material returning opening of the material returning valve is communicated with the inner cavity of the dryer through a material returning pipe; the material returning valve is connected with a compressed air pipe, and a compressed air control valve is mounted on the compressed air pipe; a material returning path of the cyclone separator is provided with a material returning amount monitoring mechanism, the signal output end of the material returning amount monitoring mechanism is connected to a controller, and the controller is in control connection with the compressed air control valve. The system is simple and reasonable in structural design, only the reverse blowing operation mode of the cyclone return pipeline is adjusted on the basis that the whole technological process is not changed, continuous and stable operation of the cyclone separator can be ensured, and meanwhile energy consumption and material loss are effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of chlorinated polyethylene production technology, specifically relating to a wind-power-saving drying, separation, and recycling system for chlorinated polyethylene. Background Technology

[0002] In the production of chlorinated polyethylene, product drying is a very important process. The main process flow is as follows: after centrifugation and dehydration, the wet chlorinated polyethylene enters the dryer through the conveying pipeline. In the dryer, it exchanges heat with the hot air flow blown in by the blower. At the same time, under the suction of the induced draft fan, the material boils in the dryer. Some small particles are carried by the air flow into the cyclone separator and then flow back into the dryer through the rotary valve and return pipe at the bottom of the cyclone separator.

[0003] Due to factors such as the characteristics of chlorinated polyethylene, particle size differences, and flowability, the return material volume of the cyclone separator varies in real time. When the return material volume is large, if the rotary valve and return pipe are not returned in time, material blockage can easily occur, affecting the cyclone separation effect and causing material loss. In severe cases, material caking can affect the normal operation of the drying system. To prevent blockage of the return pipe, the current solution is to use a normally open compressed air supply to assist in the return material supply to the rotary valve and return pipe. This normally open operation mode results in a large consumption of compressed air, significantly increasing production and operating costs. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a chlorinated polyethylene wind energy-saving drying, separation and return system that can ensure the continuous and stable operation of the cyclone separator while reducing energy consumption and material loss.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a wind-powered energy-saving drying, separation, and return material system for chlorinated polyethylene, including a dryer and a cyclone separator. The dryer has an air inlet at its bottom and an air outlet at its top, the air outlet being connected to the inner cavity of the cyclone separator. A return material valve is installed at the bottom of the cyclone separator, and the return material port of the return material valve is connected to the inner cavity of the dryer via a return material pipe. The return material valve is connected to a compressed air pipe, and a compressed air control valve is installed on the compressed air pipe. A return material quantity monitoring mechanism is installed on the return material path of the cyclone separator, and the signal output terminal of the return material quantity monitoring mechanism is connected to a controller, which controls the compressed air control valve.

[0006] As a preferred technical solution, the material return monitoring mechanism is an impact flow meter installed at the inlet of the return valve.

[0007] As another optional technical solution, the material return monitoring mechanism includes a sight glass installed on the material return pipe, and a visual monitoring system is provided at the sight glass.

[0008] As a preferred technical solution, one dryer is equipped with one or two cyclone separators.

[0009] As a preferred technical solution, the outlet of the cyclone separator is connected to a primary scrubbing tower, the exhaust gas outlet of the primary scrubbing tower is connected to an exhaust gas fan, the exhaust gas outlet of the exhaust gas fan is connected to a secondary scrubbing tower, and the secondary scrubbing tower is connected to a chimney.

[0010] Compared with existing technologies, this invention has at least the following advantages: While maintaining the overall process flow, only the operating mode of the backflushing air in the cyclone return pipeline is adjusted. By monitoring the real-time return material volume of the cyclone separator, the opening and closing of the compressed air control valve is automatically adjusted based on the return material volume, effectively reducing unnecessary consumption of compressed air during the drying process of chlorinated polyethylene. This significantly reduces production costs, improves the economic efficiency and resource utilization of chlorinated polyethylene production, and enhances the product's competitiveness in the market. The system's structure is simple and reasonable, ensuring continuous and stable operation of the cyclone separator while effectively reducing energy consumption and material loss. Attached Figure Description

[0011] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0012] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present invention;

[0013] Figure 2 This is a control principle diagram of Embodiment 1 of this utility model;

[0014] Figure 3 This is a control principle diagram of Embodiment 2 of this utility model.

[0015] In the diagram: 1-Dryer; 2-Cyclone separator; 3-Return valve; 4-Return pipe; 5-Compressed air duct; 6-Compressed air control valve; 7-Impact flow meter; 8-Controller; 9-First-stage scrubbing tower; 10-Exhaust gas fan; 11-Air inlet; 12-Air outlet; 13-Second-stage scrubbing tower; 14-Chimney; 15-Sight glass; 16-Visual monitoring system. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0017] Example 1

[0018] like Figure 1 As shown, the chlorinated polyethylene wind-powered drying, separation and recycling system includes a dryer 1 and a cyclone separator 2. In this embodiment, one dryer is equipped with two cyclone separators. Of course, one dryer can also be equipped with one cyclone separator, and both should fall within the protection scope of this utility model.

[0019] refer to Figure 2 The dryer 1 has an air inlet 11 at the bottom and an air outlet 12 and a feed inlet at the top. The air outlet 12 is connected to the inner cavity of the cyclone separator 2. The cyclone separator 2 is equipped with a return valve 3 at the bottom. The return valve 3 is used for unloading the cyclone separator 2. It is also called a rotary valve or air shut-off valve. It is a commonly used device known in the art and will not be described in detail here.

[0020] The return port of the return valve 3 is connected to the inner cavity of the dryer 1 through the return pipe 4; the return valve 3 is connected to the compressed air pipe 5, and a compressed air control valve 6 is installed on the compressed air pipe 5. The compressed air control valve 6 can be a pneumatic valve or an electric valve; an impact flow meter 7 is installed at the inlet of the return valve 3, and the signal output terminal of the impact flow meter 7 is connected to the controller 8. The controller 8 controls the compressed air control valve 6.

[0021] refer to Figure 2 During the drying process, the real-time return material volume of the cyclone separator 2 is measured by the impact flow meter 7. Based on the return material volume of the cyclone separator 2, the opening and closing of the compressed air control valve 6 is automatically adjusted. When the return material volume is large, the compressed air control valve 6 is opened, using compressed airflow to assist in the return material, avoiding blockage of the return pipe 4, and ensuring continuous and stable operation of the cyclone separator 2. When the return material volume is small, the compressed air control valve 6 is closed, and only the return valve 3 is used for normal unloading, effectively reducing unnecessary consumption of compressed air during the drying process of chlorinated polyethylene.

[0022] refer to Figure 1In this embodiment, the outlet of the cyclone separator 2 is connected to the primary scrubbing tower 9, the exhaust gas outlet of the primary scrubbing tower 9 is connected to the exhaust gas fan 10, the exhaust gas outlet of the exhaust gas fan 10 is connected to the secondary scrubbing tower 13, and the secondary scrubbing tower 13 is connected to the chimney 14. The acidic exhaust gas in the drying process of chlorinated polyethylene is neutralized by the scrubbing liquid and then discharged in compliance with the standards.

[0023] Example 2

[0024] The structural principle of this embodiment is basically the same as that of Embodiment 1, and the similarities will not be repeated. The only difference is that the monitoring method of the return material amount of the cyclone separator is different.

[0025] refer to Figure 3 In this embodiment, a transparent sight glass 15 is installed on the return pipe 4, and a visual monitoring system 16 is installed at the sight glass 15. The signal output terminal of the visual monitoring system 16 is connected to the controller 8. The visual monitoring system 16 monitors the real-time return amount of the cyclone separator 2, and automatically adjusts the opening and closing of the compressed air control valve 6 according to the amount of return material from the cyclone separator 2. The visual monitoring system 16 includes an industrial camera, lens, and light source, which are well-known technologies in the art and will not be described in detail here.

[0026] In summary, the system has a simple and reasonable structural design. With the overall process flow unchanged, only the operation mode of the back-blowing air in the cyclone return pipeline is adjusted, which can ensure the continuous and stable operation of the cyclone separator, while effectively reducing energy consumption and material loss.

[0027] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A wind energy saving drying and separating return material system of chlorinated polyethylene, comprising a dryer and a cyclone separator, a wind inlet is arranged at the bottom of the dryer, a wind outlet is arranged at the top of the dryer, and the wind outlet is communicated with the inner cavity of the cyclone separator; a return material valve is installed at the bottom of the cyclone separator, and the return material port of the return material valve is communicated with the inner cavity of the dryer through a return material pipe; characterized in that: The return valve is connected with a compressed air pipe, and a compressed air control valve is installed on the compressed air pipe; a return amount monitoring mechanism is arranged on a return path of the cyclone separator, a signal output end of the return amount monitoring mechanism is connected to a controller, and the controller controls the compressed air control valve. ​ 2. The chlorinated polyethylene wind energy conserving drying disengagement recycle system of claim 1 wherein: The return amount monitoring mechanism is an impact flowmeter installed at a feeding port of the return valve.

3. The chlorinated polyethylene wind energy conserving drying disengagement recycle system of claim 1 wherein: The return amount monitoring mechanism comprises a sight glass installed on the return pipe, and a visual monitoring system is arranged at the sight glass.

4. The chlorinated polyethylene wind energy conserving drying disengagement recycle system according to any one of claims 1 to 3, characterized in that: One dryer is correspondingly provided with one or two cyclone separators.

5. The chlorinated polyethylene wind energy conserving drying disengagement recycle system of claim 4 wherein: An air outlet of the cyclone separator is connected with a primary washing tower, a waste gas outlet of the primary washing tower is connected with a waste gas fan, a waste gas outlet of the waste gas fan is connected with a secondary washing tower, and the secondary washing tower is connected with a chimney.

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