A pretreatment device for production of mixed silicone rubber

Abstract

The present application discloses a pretreatment device for the production of mixed silicone rubber, including a kneading machine and a hydrolysis device. The kneading machine is used to produce mixed silicone rubber products. The hydrolysis device and the kneading machine are connected and matched through a conveying device. The hydrolysis device is suitable for pre-hydrolyzing the product raw materials, and the conveying device is suitable for conveying the hydrolyzed product raw materials into the kneading machine. The beneficial effects of the present application are as follows: after the hydrolysis device has completed the pre-hydrolysis treatment of the product raw materials, the product raw materials after the hydrolysis treatment are then conveyed into the kneading machine through the conveying device, so that the silane coupling agent can be pre-hydrolyzed and then conveyed into the kneading machine, thereby improving the processing efficiency of the silane coupling agent in the kneading machine. At the same time, the automated pre-hydrolysis and conveying process can also be used to achieve more efficient use of the silane coupling agent, thereby improving the performance of the mixed rubber product and saving labor costs.

Description

Technical Field

[0001] The present application relates to the technical field of silicone rubber production, and in particular to a pretreatment device for the production of mixed silicone rubber. Background Art

[0002] In the production process of compounded silicone rubber, some silane coupling agents (containing 1 to 3 hydrolyzable groups such as alkoxy, acyloxy, halogen, etc., such as vinyl trimethoxysilane, vinyl triethoxysilane, dimethyl dimethoxysilane, dimethyl diethoxysilane, phenyl trichlorosilane, etc.) are needed. Silane coupling agent is one of the most effective additives for treating the hydroxyl groups on the surface of silica. It can improve the dispersibility of silica and delay the agglomeration of silica, thus having the positive effects of inhibiting the structuring of compounded silicone rubber and improving the mechanical properties.

[0003] Common silane coupling agents have the characteristics of a more efficient hydrolysis rate in water or alcohol solutions at a specific temperature and a specific pH, and the hydrolysis products are more stable. Therefore, if the silane coupling agent is pre-hydrolyzed and then added to the kneader, the surface treatment of white carbon black can be more efficient. The traditional way of adding materials is to add them directly, that is, the silane coupling agent is not pre-hydrolyzed; although the existing method also has a way to pre-hydrolyze the silane coupling agent, it also uses manual feeding, stirring and manual feeding, which makes the labor intensity high and the process cumbersome, thereby affecting production efficiency. For this reason, a pretreatment device for the production of mixed silicone rubber is proposed to solve the above technical problems. Utility Model Content

[0004] One of the purposes of the present application is to provide a pretreatment device for the production of mixed silicone rubber.

[0005] In order to achieve the above objectives, the technical solution adopted in the present application is: a pretreatment device for the production of mixed silicone rubber, comprising a kneading machine and a hydrolysis device, the kneading machine is used to produce mixed silicone rubber products, the hydrolysis device is connected to the kneading machine through a conveying device; the hydrolysis device is suitable for pre-hydrolysis treatment of product raw materials, and the conveying device is suitable for conveying the hydrolyzed product raw materials to the kneading machine.

[0006] Preferably, the hydrolysis device comprises a hydrolysis kettle, a product raw material tank and a hydrolyzed liquid storage tank, the product raw material tank and the hydrolyzed liquid storage tank are respectively connected to the hydrolysis kettle through a conveying component, and the hydrolysis kettle is connected to the kneading machine through a conveying device.

[0007] Preferably, the hydrolysis device further comprises a stirring device and a heating device, and both the stirring device and the heating device are installed in the hydrolysis kettle. The stirring device is suitable for stirring and mixing the inside of the hydrolysis kettle, and the heating device is suitable for maintaining a set temperature of the hydrolysis kettle.

[0008] Preferably, the heating device comprises a heating jacket, which is sleeved and installed on the outside of the hydrolysis kettle; the heating jacket is suitable for passing a heat-conducting medium into the heating jacket to heat the hydrolysis kettle.

[0009] Preferably, the stirring device comprises a driving device and a stirring paddle, the driving device is installed at the top of the hydrolysis kettle, and the stirring paddle is located inside the hydrolysis kettle and installed at the output end of the driving device.

[0010] Preferably, the hydrolysis kettle is located above the kneader, the conveying device includes a discharge pipe and a valve, the first end of the discharge pipe is connected to the discharge port of the hydrolysis kettle, the second end of the discharge pipe is connected to the top of the kneader, and the valve is arranged at the discharge port; the product raw materials in the hydrolysis kettle are suitable for being added into the kneader along the discharge pipe under the action of gravity and pressure.

[0011] Preferably, the conveying assembly includes a pair of pump bodies, the input ends of the two pump bodies are respectively connected to the product raw material tank and the hydrolyzate storage tank, and the output ends of the pump bodies are connected to the hydrolysis kettle through a conveying pipe.

[0012] Preferably, a pipe heater is installed outside the delivery pipe, and the pipe heater is suitable for heating the liquid transported in the delivery pipe.

[0013] Preferably, the pretreatment device for producing compounded silicone rubber further comprises a tail gas treatment system, and the tail gas treatment system is connected to the hydrolysis kettle and treats the tail gas generated by the reaction of the hydrolysis kettle.

[0014] Preferably, the tail gas treatment system includes a condensing device, a recovery module 1 and a recovery module 2, the input end of the condensing device is connected to the hydrolysis kettle, and the two output ends of the condensing device are respectively connected to the recovery module 1 and the recovery module 2.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] The utility model is provided with a hydrolysis device and a conveying device. After the hydrolysis device performs pre-hydrolysis treatment on the product raw materials, the product raw materials after the hydrolysis treatment are conveyed to the kneader through the conveying device, so that the silane coupling agent can be pre-hydrolyzed and then conveyed into the kneader, thereby improving the processing efficiency of the silane coupling agent in the kneader. At the same time, the automated pre-hydrolysis and conveying process can also be adopted, so that the silane coupling agent can be used more efficiently, so as to improve the performance of the mixed rubber product and save labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the structure of the hydrolysis device of the utility model.

[0019] In the figure: 1. kneading machine; 2. hydrolysis device; 201. hydrolysis kettle; 202. product raw material tank; 203. hydrolyzed liquid storage tank; 204. stirring device; 2041. driving device; 2042. stirring paddle; 205. heating device; 2051. heating jacket; 3. conveying assembly; 301. pump body; 4. pipeline heater; 5. conveying device; 501. valve; 502. discharge pipe; 6. exhaust gas treatment system; 601. condensing equipment; 602. recovery module one; 603. recovery module two; 7. oil inlet; 8. oil outlet. DETAILED DESCRIPTION

[0020] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0021] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0022] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0023] One of the preferred embodiments of the present application is as follows: Figure 1 to Figure 2 As shown, a pretreatment device for the production of mixed silicone rubber includes a kneading machine 1 and a hydrolysis device 2, wherein the hydrolysis device 2 is connected to the kneading machine 1 through a conveying device 5, wherein the kneading machine 1 is used to produce mixed silicone rubber products, and the hydrolysis device 2 can perform pre-hydrolysis treatment on the (mixed silicone rubber) product raw materials. It should be known that the product raw materials are silane coupling agents.

[0024] It can be understood that after the hydrolysis device 2 performs pre-hydrolysis treatment on the product raw material, the product raw material after the hydrolysis treatment is then transported to the kneading machine 1 through the conveying device 5, so that the silane coupling agent can be pre-hydrolyzed and then sent to the kneading machine 1, thereby improving the processing efficiency of the silane coupling agent in the kneading machine 1. At the same time, the use of automated pre-hydrolysis and transportation processes can achieve more efficient use of the silane coupling agent, thereby improving the performance of the mixed rubber product and saving labor costs.

[0025] In one of the embodiments of the present application, Figure 1 As shown, the hydrolysis device 2 includes a hydrolysis kettle 201, a product raw material tank 202 and a hydrolyzed liquid storage tank 203. The product raw material tank 202 and the hydrolyzed liquid storage tank 203 are respectively connected to the hydrolysis kettle 201 through a conveying component 3, and the hydrolysis kettle 201 is connected to the kneading machine 1 through a conveying device 5.

[0026] It should be noted that the main body of the hydrolysis kettle 201 is made of stainless steel. At the same time, in order to meet the requirements of different pH hydrolyzates, the inner wall of the hydrolysis kettle 201 is sprayed with an acid-resistant and alkali-resistant polytetrafluoroethylene coating; of course, in order to further improve safety, a safe vent outlet can also be provided at the top of the hydrolysis kettle 201.

[0027] It can be understood that the product raw material tank 202 stores the silane coupling agent, and the hydrolyzate storage tank 203 stores the hydrolyzate. When the pre-hydrolysis reaction is carried out, the silane coupling agent and the hydrolyzate are automatically transported to the hydrolysis kettle 201 through the conveying component 3, and then the hydrolyzed silane coupling agent is transported to the kneading machine 1 through the conveying device 5.

[0028] Furthermore, the hydrolysis device 2 also includes a stirring device 204 and a heating device 205, both of which are installed in the hydrolysis kettle 201. The stirring device 204 can stir and mix the hydrolysis kettle 201, thereby allowing the silane coupling agent and the hydrolysis liquid to be quickly mixed to increase the hydrolysis rate; and the heating device 205 can allow the hydrolysis kettle 201 to maintain a set temperature, providing a better hydrolysis reaction condition for the silane coupling agent.

[0029] As a further description of the above embodiment: Figure 2 As shown, the heating device 205 includes a heating jacket 2051 , which is sleeved and installed on the outside of the hydrolysis kettle 201 . A heat-conducting medium can be introduced into the heating jacket 2051 to heat the hydrolysis kettle 201 .

[0030] Specifically, heated gas (steam) or liquid can be introduced into the heating jacket 2051 to heat the hydrolysis kettle 201. For example, the heat transfer medium is heat transfer oil. Figure 2As shown, an oil inlet 7 is provided at the upper end of the heating jacket 2051, and an oil outlet 8 is provided at the lower end of the heating jacket 2051. The heated heat transfer oil is added into the heating jacket 2051 through the oil inlet 7, and then the hydrolysis kettle 201 is heated by the effect of heat transfer.

[0031] It should be noted that why oil bath heating is used here instead of water bath heating? We know that the boiling point of oil is much greater than that of water. Therefore, the temperature adjustment range is larger and the flexibility is better when heating by oil bath.

[0032] like Figure 2 As shown, the stirring device 204 includes a driving device 2041 and a stirring paddle 2042 . The driving device 2041 is installed at the top of the hydrolysis kettle 201 , and the stirring paddle 2042 is located inside the hydrolysis kettle 201 and installed at the output end of the driving device 2041 .

[0033] It is understandable that the driving device 2041 is a motor, which drives the stirring paddle 2042 to rotate, thereby stirring the high-silane coupling agent and the hydrolysis liquid in the hydrolysis kettle 201, so that the two are fully in contact and react, greatly improving the reaction rate of hydrolysis.

[0034] One of the embodiments of the present application is as follows: Figure 1 As shown, the hydrolysis kettle 201 is located above the kneading machine 1, and the conveying device 5 includes a discharge pipe 502 (preferably a hose) and a valve 501. The first end of the discharge pipe 502 is connected to the discharge port of the hydrolysis kettle 201, and the second end of the discharge pipe 502 is connected to the top of the kneading machine 1. The valve 501 is set at the discharge port.

[0035] It is understandable that when the pre-hydrolysis of the high-silane coupling agent is completed, the valve 501 is opened, and the high-silane coupling agent will flow into the kneading machine 1 along the discharge pipe 502 under the action of gravity and the pressure in the hydrolysis kettle 201, thereby realizing the automatic feeding process of the high-silane coupling agent. It should be known that the conveying device 5 does not need to use a driving source, that is, it can be conveyed to the kneading machine 1 by gravity and pressure, which can reduce the cost of the device and also reduce the energy consumption during operation.

[0036] In this embodiment, Figure 1 As shown, the conveying assembly 3 includes a pair of pump bodies 301, the input ends of the two pump bodies 301 are respectively connected to the product raw material tank 202 and the hydrolyzate storage tank 203, and the output end of the pump body 301 is connected to the hydrolysis kettle 201 through a conveying pipe. It should be known that the product raw material tank 202 is used to store the high silane coupling agent.

[0037] It is understandable that, when working, the high silane coupling agent and the hydrolyzate can be transported to the hydrolysis kettle 201 through the pump body 301. Of course, the pump body 301 can adopt a metering pump, which can simultaneously complete the functions of transportation, metering and regulation, thereby realizing the precise transportation of materials.

[0038] It should be noted that since the high silane coupling agent and the hydrolysis liquid are transported to the hydrolysis kettle 201 at a "low temperature" state, and a large amount of materials entering the hydrolysis kettle 201 need a certain amount of time to be heated, although the heating device 205 and the stirring device 204 can increase the heating and hydrolysis rate, it can be further increased. Therefore, in this embodiment, if Figure 1 As shown, a pipe heater 4 can be installed outside the conveying pipe for conveying materials, and the liquid conveyed in the conveying pipe can be heated by the pipe heater 4, that is, the high silane coupling agent and the hydrolysis liquid have a certain initial temperature when entering the hydrolysis kettle 201, which can greatly shorten the time required for hydrolysis heating, thereby improving work efficiency.

[0039] In one of the embodiments of the present application, Figure 1 As shown, the pretreatment device for producing compound silicone rubber further includes an exhaust gas treatment system 6 , which is connected to the hydrolysis kettle 201 and treats the exhaust gas generated by the reaction of the hydrolysis kettle 201 .

[0040] Specifically, the tail gas treatment system 6 includes a condensing device 601, a recovery module 1 602 and a recovery module 2 603. The input end of the condensing device 601 is connected to the hydrolysis kettle 201, and the two output ends of the condensing device 601 are connected to the recovery module 1 602 and the recovery module 2 603 respectively.

[0041] It is understandable that the condensing device 601 can first cool the gas, the uncondensed gas is processed by the recovery module 1 602, and the condensed liquid is processed by the recovery module 2 603. Exemplarily, the condensed liquid (mainly water vapor with a higher boiling point) is discharged to a waste liquid pool for centralized treatment, and the uncondensed gas (mainly methanol, ethanol and other gases with a lower boiling point) can be further cryogenically recovered or directly discharged to the factory flare system for combustion.

[0042] The working principle of the utility model is:

[0043] Before the pre-hydrolysis reaction, the hydrolysis kettle 201 is first raised to a predetermined temperature and kept warm by using heat transfer oil, and then the silane coupling agent and hydrolyzate materials in the two storage tanks are preheated by the pipe heater 4 on the conveying pipe and then transported into the hydrolysis kettle 201. The motor is started, and the stirring paddle 2042 stirs the material at a suitable speed for pre-hydrolysis reaction, and at the same time, the tail gas discharge port is opened to discharge the tail gas (mainly methanol, ethanol, water vapor and other gases) generated during the hydrolysis process to the condensation equipment 601. The condensed liquid (mainly water vapor with a higher boiling point) is discharged to the waste liquid pool for centralized treatment, and the uncondensed gas (mainly methanol, ethanol and other gases with a lower boiling point) can be further cryogenically recovered or directly discharged to the factory torch system for combustion. When the hydrolysis reaction of the silane coupling agent is carried out to the set time, the hydrolysis product is added to the kneading machine 1 from the discharge port at the lower end of the hydrolysis kettle 201. While the hydrolysis reaction of the silane coupling agent is proceeding, auxiliary agents such as raw rubber, white carbon black, silicone oil, etc. can be put into the kneading machine 1 in advance and stirred into agglomerates, thereby shortening the process time.

[0044] It can be seen that the entire hydrolysis reaction process is remotely monitored and executed by the (DCS) central control, without the need for on-site manual operation and feeding, thus reducing labor costs; after the system sets the process time nodes and hydrolysis temperature, stirring speed and other conditions, the entire process can be automatically operated to improve the production efficiency of compounded silicone rubber.

[0045] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A pretreatment device for the production of mixed silicone rubber, characterized in that: include: Kneading machine, used to produce compound silicone rubber products; as well as A hydrolysis device, wherein the hydrolysis device is connected to the kneading machine via a conveying device; the hydrolysis device is suitable for pre-hydrolyzing the product raw materials, and the conveying device is suitable for conveying the hydrolyzed product raw materials into the kneading machine.

2. The pretreatment device for producing mixed silicone rubber according to claim 1, characterized in that: The hydrolysis device comprises a hydrolysis kettle, a product raw material tank and a hydrolysis liquid storage tank. The product raw material tank and the hydrolysis liquid storage tank are respectively connected to the hydrolysis kettle through a conveying component, and the hydrolysis kettle is connected to the kneading machine through a conveying device.

3. The pretreatment device for producing mixed silicone rubber according to claim 2, characterized in that: The hydrolysis device also includes a stirring device and a heating device, both of which are installed in the hydrolysis kettle. The stirring device is suitable for stirring and mixing the hydrolysis kettle, and the heating device is suitable for maintaining a set temperature of the hydrolysis kettle.

4. The pretreatment device for producing mixed silicone rubber according to claim 3, characterized in that: The heating device comprises a heating jacket, which is sleeved and installed on the outside of the hydrolysis kettle; a heat-conducting medium is suitable for passing into the heating jacket to heat the hydrolysis kettle.

5. The pretreatment device for producing mixed silicone rubber according to claim 3 or 4, characterized in that: The stirring device comprises a driving device and a stirring paddle, wherein the driving device is installed at the top of the hydrolysis kettle, and the stirring paddle is located inside the hydrolysis kettle and installed at the output end of the driving device.

6. The pretreatment device for producing mixed silicone rubber according to claim 2, characterized in that: The hydrolysis kettle is located above the kneading machine, and the conveying device includes a discharge pipe and a valve. The first end of the discharge pipe is connected to the discharge port of the hydrolysis kettle, and the second end of the discharge pipe is connected to the top of the kneading machine. The valve is arranged at the discharge port; the product raw materials in the hydrolysis kettle are suitable for being added into the kneading machine along the discharge pipe under the action of gravity and pressure.

7. The pretreatment device for producing mixed silicone rubber according to claim 2, characterized in that: The conveying assembly includes a pair of pump bodies, the input ends of the two pump bodies are respectively connected to the product raw material tank and the hydrolyzate storage tank, and the output ends of the pump bodies are connected to the hydrolysis kettle through a conveying pipe.

8. The pretreatment device for producing mixed silicone rubber according to claim 7, characterized in that: A pipe heater is installed outside the delivery pipe, and the pipe heater is suitable for heating the liquid transported in the delivery pipe.

9. The pretreatment device for producing mixed silicone rubber according to claim 2, characterized in that: The pretreatment device for producing compounded silicone rubber also includes a tail gas treatment system, which is connected to the hydrolysis kettle and treats the tail gas generated by the reaction of the hydrolysis kettle.

10. The pretreatment device for producing mixed silicone rubber according to claim 9, characterized in that: The tail gas treatment system includes a condensing device, a recovery module 1 and a recovery module 2. The input end of the condensing device is connected to the hydrolysis kettle, and the two output ends of the condensing device are connected to the recovery module 1 and the recovery module 2 respectively.

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