Material pressing system of chlorinated polyethylene kettle

Abstract

The utility model discloses a material pressing system of a chlorinated polyethylene kettle. The material pressing system comprises the chlorinated polyethylene kettle and an intermediate tank, a conveying pipeline is connected between the discharge port of the chlorinated polyethylene kettle and the feed port of the middle tank; a slurry pump is mounted on the conveying pipeline and is provided with a frequency converter; the system further comprises a pressure sensor and a controller, and the pressure sensor is installed on the conveying pipeline between the slurry pump and the middle groove and used for monitoring the pressure of materials in the conveying pipeline in real time. The pressure sensor and the frequency converter are both electrically connected with the controller, and the controller adjusts the frequency of the frequency converter according to a pressure signal fed back by the pressure sensor so as to control the rotating speed of the slurry pump. According to the utility model, the safety coefficient of the material pressing process is obviously improved, and the condition that high-chlorine-content leather materials adhered to the gas phase part of the chlorination kettle easily fall off and enter slurry to form high-spot materials due to the use of instrument air is eliminated, so that the quality stability is kept.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of chemical production equipment, concretely relates to a chlorinated polyethylene kettle pressure material system. BACKGROUND

[0002] In the chlorinated polyethylene production process, the material in the chlorinated polyethylene reactor is transported to the intermediate tank, which is a key link. At present, the traditional conveying mode is to use instrument air to beat the material. However, this mode has the following disadvantages: (1) the instrument air pressure is relatively high (0.4 MPa), which can easily cause the conveying pipeline to vibrate excessively during the material beating process, causing the gasket to leak frequently and causing safety accidents, and the safety factor is low; (2) using instrument air to beat the material can easily cause the high-chlorine content skin material adhered in the gas phase of the reactor to fall into the slurry, forming high-spot material, thereby affecting the product quality; (3) the continuous supply of instrument air consumes a large amount of energy, increasing the production cost. SUMMARY

[0003] The utility model solves the technical problem that the safety factor of the pressure material process can be improved, the product quality can be improved, and the production cost can be reduced.

[0004] To solve the above technical problems, the technical scheme of the utility model is as follows: a chlorinated polyethylene kettle pressure material system, comprising a chlorinated polyethylene kettle and an intermediate tank, a first stop valve is arranged at the discharge port of the chlorinated polyethylene kettle, and a second stop valve is arranged at the feed inlet of the intermediate tank; a conveying pipeline is connected between the discharge port of the chlorinated polyethylene kettle and the feed inlet of the intermediate tank; a slurry pump is installed on the conveying pipeline; and a frequency converter is arranged on the slurry pump.

[0005] Further comprising a pressure sensor and a controller, the pressure sensor is installed on the conveying pipeline between the slurry pump and the intermediate tank, and is used for monitoring the pressure of the material in the conveying pipeline in real time; the pressure sensor and the frequency converter are electrically connected with the controller, and the controller adjusts the frequency of the frequency converter according to the pressure signal fed back by the pressure sensor to control the rotating speed of the slurry pump.

[0006] As a preferred technical scheme, further comprising a flow sensor, the flow sensor is installed on the conveying pipeline between the slurry pump and the intermediate tank; the flow sensor is electrically connected with the controller, and the controller assists in controlling the rotating speed of the slurry pump according to the flow signal fed back by the flow sensor.

[0007] As a preferred technical scheme, an adjusting valve is installed at the outlet of the slurry pump.

[0008] Compared with the prior art, the utility model has at least the following beneficial effects:

[0009] (1) Improve safety factor: The use of slurry pump for material feeding, compared with instrument air feeding, allows the flow rate of material in the pipeline to be precisely controlled by the speed of the slurry pump, avoiding excessive vibration caused by the reduction of material in the pipeline and leakage, thus significantly improving the safety factor of the pressing process.

[0010] (2) Reduced production costs: The slurry pump has relatively low energy consumption (it is only turned on during conveying) and does not require a large amount of instrument air (continuous conveying for 24 hours), thus effectively reducing production costs. In addition, it reduces the economic losses that may be caused by safety accidents, further reducing potential costs.

[0011] (3) Improve product quality: The use of a slurry pump to transport materials eliminates the problem of high-chlorine content leather material adhering to the gas phase of the chlorination reactor falling into the slurry and forming high-spot material, which is easy to cause when using instrument air. This maintains the stability of quality. Attached Figure Description

[0012] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0013] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0014] In the diagram: 1-Chlorinated polyethylene reactor; 2-Intermediate tank; 3-First shut-off valve; 4-Second shut-off valve; 5-Transfer pipeline; 6-Slurry pump; 7-Pressure sensor; 8-Controller; 9-Regulating valve; 10-Flow sensor. Detailed Implementation

[0015] 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.

[0016] like Figure 1As shown, the chlorinated polyethylene (CPE) reactor pressing system includes a CPE reactor 1 (i.e., a chlorination reactor) and an intermediate tank 2. The outlet of the CPE reactor 1 is equipped with a first shut-off valve 3, and the inlet of the intermediate tank 2 is equipped with a second shut-off valve 4. In non-pressing conditions, both the first shut-off valve 3 and the second shut-off valve 4 remain closed. A conveying pipe 5 connects the outlet of the CPE reactor 1 and the inlet of the intermediate tank 2. A slurry pump 6 is installed on the conveying pipe 5, and the slurry pump 6 is equipped with a frequency converter. The slurry pump 6 is securely installed, and the pipe connections are well-sealed. A regulating valve 9 is installed at the outlet of the slurry pump 6. The frequency converter and the regulating valve 9 are responsible for adjusting the pressure during the material conveying process.

[0017] It also includes a pressure sensor 7 and a controller 8. The pressure sensor 8 is installed on the conveying pipe 5 located between the slurry pump 6 and the intermediate tank 2, and can monitor the pressure of the material in the conveying pipe 5 in real time and accurately. The pressure sensor 7 and the frequency converter are both electrically connected to the controller 8. The controller 8 is preset with an upper pressure limit and a lower pressure limit, and adjusts the frequency of the frequency converter according to the pressure signal fed back by the pressure sensor 7 to control the speed of the slurry pump 6.

[0018] The specific operating procedure is as follows: After the material reaction is completed in the chlorinated polyethylene reactor 1, the pressing system is started. First, the slurry pump 6 is turned on by the controller 8. The slurry pump 6 starts working, drawing the material in the chlorinated polyethylene reactor 1 and conveying it to the intermediate tank 2 through the conveying pipe 5. During the material conveying process, the pressure sensor 7 monitors the pressure of the material in the conveying pipe 5 in real time and transmits the monitored pressure signal to the controller 8 in the form of an electrical signal.

[0019] When the pressure detected by pressure sensor 7 exceeds the preset pressure limit, controller 8 receives the signal and, according to the preset control program, outputs a control signal to the frequency converter to control the slurry pump 6 to reduce its speed. As the speed of slurry pump 6 decreases, the amount of material conveyed in the pipeline decreases, the flow rate slows down, and thus the pressure of the material in the conveying pipeline decreases.

[0020] When the pressure detected by pressure sensor 7 is lower than the preset lower pressure limit, controller 8 also receives the signal and then outputs a control signal to control slurry pump 6 to increase its speed. After the speed of slurry pump 6 increases, the material conveying capacity increases, the flow rate accelerates, and the pressure of the material in the conveying pipeline rises. Through this closed-loop control method, the pressure of the material in the conveying pipeline is always maintained within a preset reasonable range, ensuring the safe and stable operation of the pressing process.

[0021] In this embodiment, a flow sensor 10 is also included. The flow sensor 10 is installed on the conveying pipe 5 located between the slurry pump 6 and the intermediate tank 2. It is responsible for detecting changes in flow rate during the material conveying process and promptly identifying pipe blockages. The flow sensor 10 is electrically connected to the controller 8. During the material conveying process, the flow sensor 10 monitors the flow rate of the material in the conveying pipe in real time and transmits the flow signal to the controller 8. When the flow rate detected by the flow sensor 10 exceeds a preset upper limit, the controller 8 controls the slurry pump 6 to reduce its speed, thereby reducing the flow rate of the material in the conveying pipe. When the flow rate detected by the flow sensor 10 is lower than a preset lower limit, the controller 8 controls the slurry pump to increase its speed, thereby increasing the flow rate of the material in the conveying pipe.

[0022] This invention employs a slurry pump for material feeding. Compared to instrument air feeding, the flow rate of the material in the pipeline can be precisely controlled by the pump's rotation speed, avoiding excessive vibration and leakage caused by reduced material in the pipeline, thus significantly improving the safety factor of the pressing process. Simultaneously, it eliminates the problem of high-chlorine content sludge adhering to the gas phase of the chlorination reactor easily detaching and entering the slurry, forming high-spot material, which is easily caused by instrument air feeding, thereby maintaining quality stability.

[0023] 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 chlorinated polyethylene reactor pressing system, comprising a chlorinated polyethylene reactor and an intermediate tank, wherein the outlet of the chlorinated polyethylene reactor is equipped with a first shut-off valve, and the inlet of the intermediate tank is equipped with a second shut-off valve; characterized in that: A conveying pipe is connected between the discharge port of the chlorinated polyethylene reactor and the inlet of the intermediate tank; a slurry pump is installed on the conveying pipe, and the slurry pump is equipped with a frequency converter. It also includes a pressure sensor and a controller. The pressure sensor is installed on the conveying pipeline located between the slurry pump and the intermediate tank to monitor the pressure of the material in the conveying pipeline in real time. The pressure sensor and the frequency converter are both electrically connected to the controller. The controller adjusts the frequency of the frequency converter according to the pressure signal fed back by the pressure sensor to control the speed of the slurry pump.

2. The chlorinated polyethylene autoclave pressing system as described in claim 1, characterized in that: It also includes a flow sensor, which is installed on the conveying pipeline located between the slurry pump and the intermediate tank; the flow sensor is electrically connected to the controller, and the controller assists in controlling the speed of the slurry pump based on the flow signal fed back by the flow sensor.

3. The chlorinated polyethylene autoclave pressing system as described in claim 1 or 2, characterized in that: A regulating valve is installed at the outlet of the slurry pump.

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