Modified resin reaction system

Abstract

The utility model relates to the technical field of chemical engineering devices, and discloses a modified resin reaction system which comprises a reactant conveying unit, a reaction kettle, a condensation circulation unit and a modified resin output unit, and the reactant conveying unit, the condensation circulation unit and the modified resin output unit are all communicated with the reaction kettle; the reactant conveying unit comprises a first conveying tank for conveying molten resin, a second conveying tank for conveying maleic anhydride and a third conveying tank for conveying an antioxidant, and the first conveying tank, the second conveying tank and the third conveying tank are all communicated with the reaction kettle; and the condensation circulating unit is used for condensing, recycling and reusing the gas-phase maleic anhydride in the reaction kettle. The utility model has the following technical effects: by arranging the condensation circulating unit, the maleic anhydride is fully utilized, the waste of reactants is avoided, the reaction cost is reduced, and meanwhile, the harm to human bodies and the environment caused by the discharge of gas-phase maleic anhydride can be avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment, and specifically relates to a modified resin reaction system. Background Art

[0002] Petroleum resin is the main raw material for the production of rubber, plastic, coatings, inks and other products. With the development of society and the advancement of science and technology, traditional petroleum resin can no longer meet production requirements. Therefore, it is necessary to modify the petroleum resin and improve its performance before putting it into production.

[0003] The modification of petroleum resin usually needs to be completed through a reaction system. The existing reaction system uses maleic anhydride as a modifier and antioxidants as auxiliary agents, and achieves the modification of petroleum resin by fully mixing and reacting with the petroleum resin material in a reactor. During the reaction process, a certain amount of gas-phase maleic anhydride will be produced in the reactor. The existing reaction system fails to recycle the produced gas-phase maleic anhydride, which will not only cause a waste of production resources and increase production costs, but also may cause certain harm to the environment and human body. Utility Model Content

[0004] In order to solve the deficiencies of the prior art, the utility model provides a modified resin reaction system. By setting a condensation circulation unit, maleic anhydride is fully utilized to avoid waste of reactants, which is beneficial to reducing reaction costs. At the same time, it can also avoid the discharge of gaseous maleic anhydride that causes harm to the human body and the environment.

[0005] The technical effects to be achieved by the utility model are achieved through the following technical aspects:

[0006] The utility model provides a modified resin reaction system, comprising a reactant delivery unit, a reaction kettle, a condensation circulation unit and a modified resin output unit, wherein the reactant delivery unit, the condensation circulation unit and the modified resin output unit are all connected to the reaction kettle;

[0007] The reactant delivery unit comprises a first delivery tank for delivering molten resin, a second delivery tank for delivering maleic anhydride, and a third delivery tank for delivering antioxidant, wherein the first delivery tank, the second delivery tank, and the third delivery tank are all connected to the reactor;

[0008] The condensation circulation unit is used to condense, recover and reuse the gas phase maleic anhydride in the reactor.

[0009] As a further description of the technical solution of the utility model, the condensation circulation unit includes a condenser and a recovery tank, the input end of the condenser is connected to the top of the reactor, the output end of the condenser is connected to the input end of the recovery tank, and the output end of the recovery tank is connected to the reactor.

[0010] As a further description of the technical solution of the utility model, it also includes a non-condensable gas processing unit, which includes a vacuum pump and a gas adsorption tank connected in sequence, and the vacuum pump is connected to the top of the recovery tank.

[0011] As a further description of the technical solution of the utility model, a cooler for reducing the temperature of non-condensable gas is connected between the recovery tank and the vacuum pump.

[0012] As a further description of the technical solution of the utility model, the reactant delivery unit also includes a reactant dissolving kettle, the input end of the reactant dissolving kettle is connected to the second delivery tank and the third delivery tank, and the output end of the reactant dissolving kettle is connected to the reactor.

[0013] As a further description of the technical solution of the utility model, the second delivery tank is connected to the reactant dissolution kettle through a first connecting pipe, and the second delivery tank is connected to the reactor through a second connecting pipe.

[0014] As a further description of the technical solution of the utility model, the third delivery tank is connected to the reactant dissolution kettle through a third connecting pipe, and the third delivery tank is connected to the reactor through a fourth connecting pipe.

[0015] As a further description of the technical solution of the utility model, a delivery pump is provided at the output end of the second delivery tank.

[0016] As a further description of the technical solution of the utility model, the modified resin output unit includes a modified resin storage tank connected to the output end of the reactor.

[0017] As a further description of the technical solution of the utility model, a modified resin output pump is provided at the output end of the modified resin storage tank.

[0018] In summary, the utility model has at least the following benefits:

[0019] The modified resin reaction system provided by the utility model condenses and recovers the gaseous maleic anhydride generated in the reaction kettle and recycles it by arranging a condensation circulation unit, so that the maleic anhydride is fully utilized, the waste of production resources is avoided, and the production cost is reduced; at the same time, the harm to human body and environment caused by the discharge of the gaseous maleic anhydride can be avoided, and the utility model has certain environmental protection value. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a modified resin reaction system according to Example 1 of the utility model;

[0021] Figure 2 This is a schematic structural diagram of a modified resin reaction system according to Example 2 of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of the modified resin reaction system of Example 3 of the utility model.

[0023] Markings in the figure:

[0024] 1. Reactant delivery unit; 11. First delivery tank; 12. Second delivery tank; 13. Third delivery tank; 14. Reactant dissolving kettle; 15. Delivery pump;

[0025] 2. Reactor;

[0026] 3. Condensation circulation unit; 31. Condenser; 32. Recovery tank;

[0027] 4. Modified resin output unit; 41. Modified resin storage tank; 42. Modified resin output pump;

[0028] 5. Non-condensable gas treatment unit; 51. Vacuum pump; 52. Gas adsorption tank; 53. Cooler;

[0029] A, first connecting pipeline; B, second connecting pipeline; C, third connecting pipeline; D, fourth connecting pipeline. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Example 1

[0033] refer to Figure 1The modified resin reaction system provided in this embodiment includes a reactant delivery unit 1, a reactor 2, a condensation circulation unit 3 and a modified resin output unit 4. The reactant delivery unit 1, the condensation circulation unit 3 and the modified resin output unit 4 are all connected to the reactor 2. Specifically, the reactant delivery unit 1 is connected to the input end of the reactor 2, the condensation circulation unit 3 is connected to the top of the reactor 2, and the modified resin output unit 4 is connected to the output end of the reactor 2.

[0034] The reactant delivery unit 1 includes a first delivery tank 11 for delivering molten resin, a second delivery tank 12 for delivering maleic anhydride, and a third delivery tank 13 for delivering antioxidants. The first delivery tank 11, the second delivery tank 12, and the third delivery tank 13 are all connected to the input end of the reactor 2. When the molten resin, maleic anhydride, and antioxidant are all added, the pressure in the reactor 2 will rise to 0.2MPa, and the temperature will rise to 230°C, and then the resin modification reaction will begin.

[0035] The condensation circulation unit 3 is used for condensing and recycling the gas phase maleic anhydride in the reactor 2. It is understandable that the gas phase maleic anhydride will be liquefied into liquid maleic anhydride under the condensation of the condensation circulation unit 3, and can be reused again. In some embodiments, the maleic anhydride recovered by condensation can be directly transported back to the reactor 2 for reuse. In other embodiments, the maleic anhydride recovered by condensation can also be temporarily stored and used in other production systems. In the present embodiment, the maleic anhydride recovered by condensation is directly transported back to the reactor 2, mixed and reacted with the molten resin and the antioxidant again, and a modified resin is prepared.

[0036] The gaseous maleic anhydride generated in the reactor 2 is condensed, recovered and recycled by the condensation circulation unit 3, so that the maleic anhydride is fully utilized, avoiding waste of production resources and helping to reduce production costs. By recovering the gaseous maleic anhydride, the discharge of the gaseous maleic anhydride can also avoid harm to the human body and the environment, which has certain environmental protection value and is conducive to achieving green production.

[0037] As one embodiment, the condensation circulation unit 3 includes a condenser 31 and a recovery tank 32, the input end of the condenser 31 is connected to the top of the reactor 2, the output end of the condenser 31 is connected to the input end of the recovery tank 32, and the output end of the recovery tank 32 is connected to the reactor 2. It can be understood that during the reaction process, the gaseous maleic anhydride generated in the reactor 2 will be discharged from the top of the reactor 2, the gaseous maleic anhydride first passes through the condenser 31, and is liquefied to form liquid maleic anhydride under the condensation effect of the condenser 31, and then the liquid maleic anhydride is transported to the recovery tank 32 for temporary storage. When the maleic anhydride in the recovery tank 32 reaches a certain liquid level, the maleic anhydride will be discharged from the bottom of the recovery tank 32 and transported back to the reactor 2 to participate in the modification reaction of the resin again.

[0038] In some embodiments, the cold source of the condenser 31 may come from an external cold source, such as a low-temperature water circulation or a refrigeration device; in other embodiments, the cold source of the condenser may also come from an internal cold source, such as a low-temperature material in an upstream production system or a downstream production system.

[0039] In this embodiment, the cold source of the condenser 31 comes from the low-temperature water circulation, and the low-temperature water circulates in the shell of the condenser 31, so as to achieve the effect of cooling the high-temperature gas-phase maleic anhydride. Since the temperature of the gas-phase maleic anhydride is as high as 200°C or more, the gas-phase maleic anhydride can be cooled by using low-temperature water of 40 to 60°C. Specifically, the shell of the condenser 31 is connected with a heat exchanger and a low-temperature water tank. When working, the low-temperature water tank first transports the low-temperature water to the shell of the condenser 31. After heat exchange with the gas-phase maleic anhydride, the temperature of the low-temperature water increases, and the low-temperature water with increased temperature is transported to the heat exchanger for cooling, and then transported back to the low-temperature water tank to participate in the circulation cooling again.

[0040] As a further optimization, the modified resin reaction system also includes a non-condensable gas treatment unit 5, which includes a vacuum pump 51 and a gas adsorption tank 52 connected in sequence, and the vacuum pump 51 is connected to the top of the recovery tank 32. In some embodiments, the gas adsorption tank 52 uses activated carbon to adsorb and purify the non-condensable gas. Since some non-condensable gas will remain after the gas phase maleic anhydride is condensed and liquefied by the condenser 31, and the non-condensable gas will accumulate on the top of the recovery tank, the non-condensable gas accumulated in the recovery tank 32 can be extracted into the gas adsorption tank 52 for adsorption and purification under the action of the vacuum pump 51, thereby avoiding the accumulation of non-condensable gas and affecting the normal use of the recovery tank 32, and at the same time avoiding the emission of harmful gases and causing environmental pollution, which has certain environmental protection value.

[0041] As a further optimization, a cooler 53 for reducing the temperature of the non-condensable gas is connected between the recovery tank 32 and the vacuum pump 51. Since the temperature of the non-condensable gas is still relatively high, direct adsorption and subsequent discharge may result in a rise in the ambient temperature. Therefore, the cooler 53 is provided to first cool the non-condensable gas discharged from the recovery tank 32, and then discharge it to the gas adsorption tank 52 for adsorption and purification treatment, thereby effectively avoiding the service life of the gas adsorption tank 52 being affected by the excessively high temperature of the non-condensable gas, and at the same time avoiding the emission of high-temperature non-condensable gas leading to an increase in ambient temperature and affecting the ecological environment.

[0042] The modified resin reaction system of this embodiment, by providing a condensation circulation unit, makes full use of maleic anhydride, avoids the waste of production resources, is beneficial to reduce production costs, and at the same time avoids the discharge of gaseous maleic anhydride that causes harm to the human body and the environment; by providing a non-condensable gas treatment unit, the non-condensable gas can be adsorbed and purified, which can not only ensure the normal operation of the reaction system, but also prevent the impact on the ecological environment, and has certain environmental protection value.

[0043] Example 2

[0044] As a further optimization of Example 1, refer to Figure 2 , the reactant delivery unit 1 further includes a reactant dissolving kettle 14, the input end of the reactant dissolving kettle 14 is connected to the second delivery tank 12 and the third delivery tank 13, and the output end of the reactant dissolving kettle 14 is connected to the reactor 2. It can be understood that the maleic anhydride in the second delivery tank 12 and the antioxidant in the third delivery tank 13 are first delivered to the reactant dissolving kettle 14 for sufficient mixing and dissolution, and then the mixture of maleic anhydride and antioxidant is formed and then delivered to the reactor 2 to react with the molten resin. The mixing and dissolving of maleic anhydride and antioxidant in advance by the reactant dissolving kettle 14 can promote the modification reaction of the two with the molten resin, improve the reaction efficiency and reaction sufficiency, and is conducive to the improvement of the performance of the modified resin.

[0045] The second delivery tank 12 is connected to the reagent dissolving kettle 14 through the first connecting pipe A, and the second delivery tank 12 is connected to the reactor 2 through the second connecting pipe B. A delivery pump 15 is provided at the output end of the second delivery tank 12. The third delivery tank 13 is connected to the reagent dissolving kettle 14 through the third connecting pipe C, and the third delivery tank 13 is connected to the reactor 2 through the fourth connecting pipe D.

[0046] It can be understood that the maleic anhydride output from the second conveying tank 12 is divided into two streams, one stream is conveyed to the reactant dissolving kettle 14 to mix and dissolve with the antioxidant, and the other stream is directly conveyed to the reactor 2 to participate in the resin modification reaction; similarly, the antioxidant output from the third conveying tank 13 is also divided into two streams, one stream is conveyed to the reactant dissolving kettle 14 to mix and dissolve with the maleic anhydride, and the other stream is conveyed to the reactor 2 to participate in the reaction. In this way, the full reaction of the molten resin with the maleic anhydride and the antioxidant can be promoted to improve the sufficiency of the reaction; and the reaction efficiency can be improved, thereby improving the production efficiency.

[0047] Example 3

[0048] As a further optimization of Example 2, refer to Figure 3 The modified resin output unit 4 includes a modified resin storage tank 41 connected to the output end of the reactor 2. The output end of the modified resin storage tank 41 is provided with a modified resin output pump 42. The modified resin output pump 42 is used to transport the modified resin in the modified resin storage tank 41 to the granulator for the production of finished granules. The modified resin storage tank 41 can play a temporary storage and buffering role, thereby improving the controllability and safety of the modified resin production.

[0049] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does 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 therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0051] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A modified resin reaction system, characterized in that: The invention comprises a reactant conveying unit (1), a reaction kettle (2), a condensation circulation unit (3) and a modified resin output unit (4), wherein the reactant conveying unit (1), the condensation circulation unit (3) and the modified resin output unit (4) are all connected to the reaction kettle (2); The reactant conveying unit (1) comprises a first conveying tank (11) for conveying molten resin, a second conveying tank (12) for conveying maleic anhydride and a third conveying tank (13) for conveying an antioxidant, wherein the first conveying tank (11), the second conveying tank (12) and the third conveying tank (13) are all connected to the reaction kettle (2); The condensation circulation unit (3) is used to condense, recover and reuse the gas phase maleic anhydride in the reaction kettle (2).

2. The modified resin reaction system according to claim 1, characterized in that: The condensation circulation unit (3) comprises a condenser (31) and a recovery tank (32), wherein the input end of the condenser (31) is connected to the top of the reactor (2), the output end of the condenser (31) is connected to the input end of the recovery tank (32), and the output end of the recovery tank (32) is connected to the reactor (2).

3. The modified resin reaction system according to claim 2, characterized in that: It also comprises a non-condensable gas processing unit (5), the non-condensable gas processing unit (5) comprising a vacuum pump (51) and a gas adsorption tank (52) connected in sequence, the vacuum pump (51) being connected to the top of the recovery tank (32).

4. The modified resin reaction system according to claim 3, characterized in that: A cooler (53) for reducing the temperature of non-condensable gas is connected between the recovery tank (32) and the vacuum pump (51).

5. The modified resin reaction system according to claim 1, characterized in that: The reactant delivery unit (1) further comprises a reactant dissolving kettle (14), the input end of the reactant dissolving kettle (14) being connected to the second delivery tank (12) and the third delivery tank (13), and the output end of the reactant dissolving kettle (14) being connected to the reactor (2).

6. The modified resin reaction system according to claim 5, characterized in that: The second transport tank (12) is connected to the reactant dissolving kettle (14) via a first connecting pipe (A), and the second transport tank (12) is connected to the reaction kettle (2) via a second connecting pipe (B).

7. The modified resin reaction system according to claim 6, characterized in that: The third delivery tank (13) is connected to the reactant dissolving kettle (14) via a third connecting pipe (C), and the third delivery tank (13) is connected to the reaction kettle (2) via a fourth connecting pipe (D).

8. The modified resin reaction system according to claim 6, characterized in that: A delivery pump (15) is provided at the output end of the second delivery tank (12).

9. The modified resin reaction system according to claim 1, characterized in that: The modified resin output unit (4) comprises a modified resin storage tank (41) connected to the output end of the reaction kettle (2).

10. The modified resin reaction system according to claim 9, characterized in that: The output end of the modified resin storage tank (41) is provided with a modified resin output pump (42).

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