UHPC panel repair material and preparation process thereof

Abstract

The invention relates to the technical field of chemical materials, and discloses a UHPC panel repair material and a preparation process thereof, the UHPC panel repair material comprises a pretreatment kettle, an esterification kettle, an extraction mechanism, a refining mechanism, a coating reaction kettle and a bottom plate; the pretreatment kettle, the esterification kettle, the extraction mechanism, the refining mechanism and the coating reaction kettle are sequentially communicated through pipelines and are all placed above the bottom plate; raw materials are changed into methacrylic acid through the pretreatment kettle, then the methacrylic acid and methyl alcohol are subjected to esterification reaction to directly generate coarse MMA, the process is shortened, the conversion rate is increased, MMA is stirred in the extraction mechanism to rapidly react with water, unreacted methyl alcohol is extracted with water, raffinate contains MMA / MAA, and the extraction efficiency is improved. And then the extracted invalid solution enters the extraction funnel again through the recovery three-way valve and the recovery pipe for multiple times of extraction, so that the extraction rate is improved, the extracted solution is used for producing high-progress MMA through the refining mechanism so as to react with subsequent butyl acrylate, and defoaming is performed through the defoaming machine to generate the required coating.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of chemical materials, in particular to a UHPC panel repairing material and a preparation process thereof. BACKGROUND

[0002] At present, most of the trestle panels used in the construction process of bridges on water are in the form of steel structure panels or prefabricated reinforced concrete panels, the steel structure is prone to corrosion on the sea, has small rigidity, and the prefabricated reinforced concrete panel has a large self weight, a large amount of wet work on site, is often worn, and the quality is difficult to guarantee, and cannot meet the needs of long-term high-frequency passing of heavy equipment. Methyl methacrylate is an organic compound with a molecular formula of C5H8O2, which is a colorless and transparent liquid, has an odor similar to alcohol at normal temperature and pressure, and is mainly prepared through esterification of methyl acrylate. Methyl methacrylate is an important engineering plastic with excellent transparency, weather resistance and ultraviolet resistance, and is widely used in various fields. The coating prepared from methyl methacrylate and butyl acrylate has high strength after curing, can bond various substrates such as metals, plastics and composite materials, has good chemical resistance and temperature resistance (-40 DEG C to 120 DEG C), has less heat release during the curing process, has small risk of substrate cracking, and therefore can be matched with the panel. When the trestle panel is worn, the MMA special material can be used for repairing, so as to solve the problems of easy wear and difficult repair of the traditional trestle panel.

[0003] In view of the above problems, a UHPC panel repairing material and a preparation process thereof are provided. SUMMARY

[0004] The application aims to provide a UHPC panel repairing material and a preparation process thereof, and solves the problems of preparation of the MMA special material in the background art, and can better extract and control the extractant during preparation.

[0005] In order to achieve the above object, the present application provides the following technical scheme: a preparation device of UHPC panel repair material: comprising: a pretreatment kettle, an esterification kettle, an extraction mechanism, a refining mechanism, a coating reaction kettle and a bottom plate; the pretreatment kettle, the esterification kettle, the extraction mechanism, the refining mechanism and the coating reaction kettle are sequentially connected in communication through pipelines, and are all placed above the bottom plate, the extraction mechanism comprises an extraction rod, an extraction funnel, an extraction ring and a bevel gear disc, an extraction plate is fixedly connected above the bottom plate, the extraction rod is fixedly connected above the extraction plate, the extraction ring is slidably connected in the extraction rod, the extraction funnel is fixedly connected in the extraction ring, the bevel gear disc is rotatably connected in the extraction funnel, a first stirring shaft is fixedly connected below the bevel gear disc, a connecting rod is rotatably connected outside the extraction funnel, a first bevel gear is fixedly connected to one end of the connecting rod, the first bevel gear is meshingly connected with the bevel gear disc, and a second bevel gear is fixedly connected to the other end of the connecting rod away from the first bevel gear.

[0006] As a further description of the above technical scheme: the inside of the extraction rod is provided with a warning mechanism, the warning mechanism comprises a warning groove, a warning spring and a warning motor, the outside of the extraction rod is provided with the warning groove, the inside of the warning groove is fixedly connected with the warning motor, the output end of the warning motor is fixedly connected with a third bevel gear, the second bevel gear is detachably connected with the third bevel gear, the inside of the warning groove is fixedly connected with the warning spring, and the warning spring is fixedly connected with the extraction ring.

[0007] As a further description of the above technical scheme: the top of the bottom plate is provided with a recovery mechanism, a recovery barrel is fixedly connected to the top of the bottom plate through a support, a water tank is arranged above the recovery barrel, the water tank is connected in communication with the extraction funnel, one side of the recovery barrel is connected in communication with a discharge pipe, the outside of the discharge pipe is connected in communication with a recovery pipe through a recovery three-way valve, the recovery pipe is connected in communication with the top end of the extraction funnel, and a liquid separation three-way valve is arranged below the extraction funnel and connected in communication with the discharge pipe and the pipeline.

[0008] As a further description of the above technical scheme: the refining mechanism comprises a deacidification tower, a light component removal tower and a purification tower, the deacidification tower, the light component removal tower and the purification tower are all installed above the bottom plate through supports and connected in communication through pipelines in sequence, and the deacidification tower is connected in communication with the liquid separation three-way valve through a pipeline.

[0009] As a further description of the above technical scheme: the coating reaction kettle comprises an autoclave and a defoaming machine.

[0010] As a further description of the above technical scheme: the outside of the extraction rod is provided with a limiting hole, and a limiting rod is slidably connected in the limiting hole.

[0011] A UHPC panel repair material, comprising the following steps: S1, raw material processing, after isobutylene and air are preheated, the isobutylene is placed in a pretreatment kettle and subjected to an oxidation reaction, then a catalyst is added to generate methacrolein, and then oxidized into methacrylic acid; S2, rough production, methacrylic acid is placed in an esterification kettle, then methanol is added to generate crude MMA, and the corresponding polymerization inhibitor is continuously added during the reaction; S3, extraction, the generated crude MMA solution is placed in an extraction funnel, and according to the solution amount, water is injected at a ratio of 1:1.3, and then mixed by the first stirring shaft to extract; S4, refining, the solution after extraction enters the refining mechanism, and sequentially passes through the deacidification tower, the light component removal tower and the purification tower to remove residual MAA, remove light components and remove impurities to obtain high-precision MMA; S5, paint production, high-precision MMA and butyl acrylate are placed in a paint reaction kettle and stirred and polymerized by a high-pressure kettle, and an initiator AIBN is added according to the proportion, the proportion is 0.12g / 10mL, then the defoaming machine inside the paint reaction kettle is used for defoaming.

[0012] Compared with the prior art, the beneficial effects of the present application are as follows: The UHPC panel repair material and the preparation process thereof provided by the present application can shorten the process, improve the conversion rate, and make the MMA react quickly with water in the extraction mechanism through stirring, extract the unreacted methanol with water, and then extract the residual phase containing MMA / MAA multiple times through the recovery tee valve and the recovery pipe to improve the extraction rate.

[0013] The UHPC panel repair material and the preparation process thereof provided by the present application can shorten the process, improve the conversion rate, and make the MMA react quickly with water in the extraction mechanism through stirring, extract the unreacted methanol with water, and then extract the residual phase containing MMA / MAA multiple times through the recovery tee valve and the recovery pipe to improve the extraction rate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a perspective structure schematic diagram of the present application; Figure 2 It is a rear view structure schematic diagram of the present application; Figure 3It is a structure schematic diagram of the extraction mechanism in the application; Figure 4 It is a sectional structure schematic diagram of the extraction mechanism in the application; Figure 5 It is an enlarged structure schematic diagram of A in the application Figure 4 ; Figure 6 It is a process flow chart of the application; Figure 7 It is one of the detection report charts of the application; Figure 8 It is two of the detection report charts of the application; Figure 9 It is three of the detection report charts of the application.

[0015] In the figure: 1, pretreatment kettle; 2, esterification kettle; 3, extraction mechanism; 301, extraction rod; 302, extraction funnel; 303, extraction ring; 304, bevel gear; 305, extraction plate; 306, first stirring shaft; 307, connecting rod; 308, first bevel gear; 309, second bevel gear; 4, refining mechanism; 401, deacidification tower; 402, light removal tower; 403, purification tower; 5, coating reaction kettle; 501, high-pressure kettle; 502, defoaming machine; 6, bottom plate; 7, warning mechanism; 701, warning groove; 702, warning spring; 703, warning motor; 704, third bevel gear; 8, recovery mechanism; 801, support; 802, recovery bucket; 803, water tank; 804, exhaust pipe; 805, recovery pipe; 9, three-way valve; 10, recovery three-way valve; 11, limiting hole; 12, limiting rod. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the application.

[0017] The application will be described in detail with reference to the drawings for the purpose of further understanding the content of the application.

[0018] The drawings are combined Figure 1 , Figure 2 , Figure 3 and Figure 4The utility model provides a kind of preparation device of UHPC panel repair material: including: pretreatment kettle 1, esterification kettle 2, extraction mechanism 3, refining mechanism 4, coating reaction kettle 5 and bottom plate 6;Pretreatment kettle 1 with esterification kettle 2 with extraction mechanism 3 with refining mechanism 4 with coating reaction kettle 5 are sequentially communicated by pipeline, and are placed above bottom plate 6, pretreatment kettle 1 is existing oxidation reactor, esterification kettle 2 is esterification reactor, extraction mechanism 3 includes extraction rod 301, extraction funnel 302, extraction ring 303 and bevel gear disc 304, extraction funnel 302 is existing extraction instrument, extraction plate 305 is fixedly connected above the top of bottom plate 6, extraction rod 301 is fixedly connected above the top of extraction plate 305, extraction ring 303 is slidably connected in the inside of extraction rod 301, extraction funnel 302 is fixedly connected in the inside of extraction ring 303, bevel gear disc 304 is rotatably connected in the inside of extraction funnel 302, first stirring shaft 306 is fixedly connected below bevel gear disc 304, by the rotation of first stirring shaft 306, let extraction solution speed up reaction and with water, then unesterified methanol is dissolved in water below extraction funnel, and the required solution is layered above extraction funnel to facilitate later classification;Extraction funnel 302 is rotatably connected with connecting rod 307 on the outside, connecting rod 307 is fixedly connected with first bevel gear 308 at one end of extraction funnel 302, first bevel gear 308 is meshingly connected with bevel gear disc 304, second bevel gear 309 is fixedly connected at the end of connecting rod 307 away from first bevel gear 308, by the rotation of connecting rod 307 to drive first bevel gear 308 to rotate, let the solution in the inside of extraction funnel 302 be stirred, and extraction funnel 302 can be selected to be the instrument of transparent material for the convenience of observation; When using, by the oxidation reaction of isobutylene and air preheating and then putting into pretreatment kettle 1, then adding catalyst to generate methacrolein, and then oxidizing into methacrylic acid;Methacrylic acid is put into esterification kettle 2, then methanol is added to generate crude MMA, and corresponding polymerization inhibitor is continuously added during the reaction, the generated crude MMA solution is put into extraction funnel 302, and according to the solution amount, clear water is injected according to the proportion of 1:1.3, and then stirring and mixing are carried out by first stirring shaft 306, and then extraction is carried out; Refining mechanism 4 includes deacidification tower 401, light component removal tower 402 and purification tower 403, deacidification tower 401, light component removal tower 402 and purification tower 403 are installed on the top of bottom plate 6 through support 801, and are sequentially communicated through pipeline, and deacidification tower 401 is communicated with liquid separation tee joint valve 9 through pipeline;Deacidification tower 401 removes residual MAA, the purity of MMA at tower top is greater than 98.4%, then light component removal tower 402 removes light components, the purity of MMA at tower bottom is greater than 99.9%, and finally high-purity MMA is produced by purification tower 403, and impurities are controlled; The coating reaction kettle 5 comprises a high-pressure kettle 501 and a defoaming machine 502; a limiting hole 11 is formed on the outer side of the extraction rod 301, a limiting rod 12 is slidably connected in the limiting hole 11, MMA and butyl acrylate are copolymerized in the high-pressure kettle 501 at a temperature of 76-78 DEG C, an initiator AIBN is added in an amount of 0.12 g / 10 mL of monomer, a prepolymer with a molecular weight of 7000-8000 is generated, and the defoaming machine 502 is vibrated to remove bubbles, so as to ensure the compactness of the resin.

[0019] In combination Figure 5 , the inside of the extraction rod 301 is provided with a warning mechanism 7, the warning mechanism 7 comprises a warning groove 701, a warning spring 702 and a warning motor 703, the outer side of the extraction rod 301 is provided with the warning groove 701, the inside of the warning groove 701 is fixedly connected with the warning motor 703, the output end of the warning motor 703 is fixedly connected with a third bevel gear 704, the second bevel gear 309 is detachably connected with the third bevel gear 704, the inside of the warning groove 701 is fixedly connected with the warning spring 702, the warning spring 702 is fixedly connected with the extraction ring 303, when the gravity of the solution in the extraction funnel 302 increases, the warning spring 702 is extruded, the extraction funnel 302 drives the extraction ring 303 to descend, when being at the lowest point, the second bevel gear 309 is in contact and meshing with the third bevel gear 704, and then the limiting rod 12 is used for clamping, the warning motor 703 is rotated to rotate the bevel gear disc 304 and the first stirring shaft 306, so as to accelerate the extraction efficiency.

[0020] In combination Figure 3 and Figure 4 , the upper side of the bottom plate 6 is provided with a recovery mechanism 8, the upper side of the bottom plate 6 is fixedly connected with a recovery barrel 802 through a support 801, the upper side of the recovery barrel 802 is provided with a water tank 803, the water tank 803 is communicated with the extraction funnel 302, one side of the recovery barrel 802 is communicated with a discharge pipe 804, the outer side of the discharge pipe 804 is communicated with a recovery pipe 805 through a recovery three-way valve 10, the recovery pipe 805 is communicated with the top end of the extraction funnel 302, the lower side of the extraction funnel 302 is provided with a separation three-way valve 9, the separation three-way valve 9 is respectively communicated with the discharge pipe 804 and a pipeline, the water solution containing methanol after extraction needs to re-enter the extraction funnel 302 through the recovery three-way valve 10 for further extraction, so as to avoid waste, and the separation three-way valve 9 guides the solution.

[0021] In combination Figure 6 A UHPC panel repair material comprises the following steps: S1, raw material treatment, after the isobutene is preheated with air, the isobutene is put into a pretreatment kettle 1 to perform an oxidation reaction, then a catalyst is added to generate methacrolein, and then the methacrolein is oxidized into methacrylic acid; S2, rough production, methyl methacrylate is put into esterification kettle 2, then methanol is added to react to generate crude MMA, and the corresponding polymerization inhibitor is continuously added during the reaction; S3, extraction, the generated crude MMA solution is put into the extraction funnel 302, and according to the solution amount, the water is injected according to the ratio of 1:1.3, and then the first stirring shaft 306 is stirred and mixed to extract; S4, refining, the solution after extraction enters the refining mechanism 4, and is sequentially treated by removing residual MAA, removing light components and removing impurities through the deacidification tower 401, the light component removal tower 402 and the purification tower 403, to obtain high-precision MMA; S5, paint production, high-precision MMA and butyl acrylate are put into the paint reaction kettle 5, and the initiator AIBN is added according to the proportion, the proportion is 0.12g / 10mL, then the defoaming machine 502 inside the paint reaction kettle 5 is used for defoaming.

[0022] Working principle, by putting isobutene and air into the pretreatment kettle 1 after preheating to oxidize, then adding catalyst to generate methyl methacrylate, and then oxidizing into methyl methacrylate; methyl methacrylate is put into esterification kettle 2, then methanol is added to react to generate crude MMA, and the corresponding polymerization inhibitor is continuously added during the reaction, the generated crude MMA solution is put into the extraction funnel 302, and according to the solution amount, the water is injected according to the ratio of 1:1.3, when the solution in the extraction funnel 302 is gravity increased, the warning spring 702 is extruded, the extraction funnel 302 drives the extraction ring 303 to descend, when it is at the lowest point, the second bevel gear 309 is in contact with the third bevel gear 704, then the limiting rod 12 is clamped, the warning motor 703 is rotated to rotate the bevel gear disc 304 to rotate the first stirring shaft 306 to stir and accelerate the extraction efficiency; the solution after extraction is treated by removing residual MAA through the deacidification tower 401, the MMA purity at the top of the tower is >98.4%, then the light component removal tower 402 is used to remove light components, the MMA in the tower kettle is >99.9%, and finally the high-purity MMA is produced by the purification tower 403, and the impurities are controlled; then MMA and butyl acrylate are copolymerized in the autoclave 501 at a temperature of 76-78℃, the amount of initiator AIBN added is 0.12g / 10mL monomer, a prepolymer with a molecular weight of 7000-8000 is generated, and the defoaming machine 502 is vibrated to remove bubbles to ensure the density of the resin; During extraction, the aqueous solution containing methanol is input into the discharge pipe 804 through the three-way valve 9, then the solution is re-input into the extraction funnel 302 through the recovery pipe 805 through the recovery three-way valve 10 for multiple extractions, and then the MMA solution is input into the deacidification tower 401 through the pipeline through the three-way valve 9 to improve the extraction rate.

[0023] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary of the principles and application of the present application. Numerous modifications and adaptions can be effected without departing from the spirit and scope of the present application, which is not limited to the exact construction and arrangement described. It is intended, therefore, to cover all modifications and adaptions that fall within the scope of the claims and their equivalents.

Claims

1. An apparatus for preparing a UHPC panel repair material: comprising: Pretreatment vessel (1), esterification vessel (2), extraction mechanism (3), refining mechanism (4), coating reaction vessel (5) and bottom plate (6); The pretreatment vessel (1), esterification vessel (2), extraction mechanism (3), purification mechanism (4), and coating reaction vessel (5) are all connected sequentially by pipes and are all placed above the base plate (6). The extraction mechanism (3) includes an extraction rod (301), an extraction funnel (302), an extraction ring (303), and a conical toothed disc (304). An extraction plate (305) is fixedly connected above the base plate (6), and an extraction rod (301) is fixedly connected above the extraction plate (305). An extraction ring (303) is slidably connected inside the extraction rod (301). An extraction funnel (302) is fixedly connected inside the funnel (302). A beveled disc (304) is rotatably connected inside the extraction funnel (302). A first stirring shaft (306) is fixedly connected below the beveled disc (304). A connecting rod (307) is rotatably connected to the outside of the extraction funnel (302). A first bevel gear (308) is fixedly connected to one end of the connecting rod (307) located in the extraction funnel (302). The first bevel gear (308) meshes with the beveled disc (304). A second bevel gear (309) is fixedly connected to the end of the connecting rod (307) away from the first bevel gear (308).

2. The apparatus for preparing a UHPC panel repair material according to claim 1, characterized in that: The extraction rod (301) is provided with a warning mechanism (7) inside. The warning mechanism (7) includes a warning groove (701), a warning spring (702) and a warning motor (703). The outer side of the extraction rod (301) is provided with a warning groove (701). The warning motor (703) is fixedly connected inside the warning groove (701). The output end of the warning motor (703) is fixedly connected with a third bevel gear (704). The second bevel gear (309) and the third bevel gear (704) are detachably connected. The warning spring (702) is fixedly connected inside the warning groove (701). The warning spring (702) is fixedly connected to the extraction ring (303).

3. The apparatus for preparing a UHPC panel repair material according to claim 1, characterized in that: A recycling mechanism (8) is provided above the base plate (6). A recycling bucket (802) is fixedly connected above the base plate (6) via a bracket (801). A water tank (803) is provided above the recycling bucket (802). The water tank (803) is connected to the extraction funnel (302). A drain pipe (804) is connected to one side of the recycling bucket (802). A recycling pipe (805) is connected to the outside of the drain pipe (804) via a recycling three-way valve (10). The recycling pipe (805) is connected to the top of the extraction funnel (302). A liquid-separating three-way valve (9) is provided below the extraction funnel (302). The liquid-separating three-way valve (9) is connected to the drain pipe (804) and the pipeline respectively.

4. The apparatus for preparing a UHPC panel repair material according to claim 1, characterized in that: The refining mechanism (4) includes a deacidification tower (401), a light-light removal tower (402), and a purification tower (403). The deacidification tower (401), the light-light removal tower (402), and the purification tower (403) are all installed above the base plate (6) by a bracket (801) and are connected in sequence by pipes. The deacidification tower (401) is connected to the liquid separator three-way valve (9) by a pipe.

5. The apparatus for preparing a UHPC panel repair material according to claim 1, characterized in that: The coating reaction vessel (5) includes a high-pressure vessel (501) and a degassing machine (502).

6. The apparatus for preparing a UHPC panel repair material according to claim 2, characterized in that: A limiting hole (11) is provided on the outer side of the extraction rod (301), and a limiting rod (12) is slidably connected in the limiting hole (11).

7. A UHPC panel repair material, characterized in that: Includes the following steps: S1. Raw material processing: Isobutylene is preheated with air and then placed in a pretreatment vessel (1) for oxidation reaction. Then a catalyst is added to generate methacrolein, which is then oxidized to methacrylic acid. S2. Crude preparation: methacrylic acid is placed in an esterification vessel (2), and methanol is added to react and generate crude MMA. During the reaction, the corresponding polymerization inhibitor is continuously added. S3. Extraction: The generated crude MMA solution is placed into the extraction funnel (302), and water is added according to the solution volume at a ratio of 1:1.

3. After stirring and mixing by the first stirring shaft (306), extraction is carried out. S4. Refining: The extracted solution enters the refining unit (4) and passes through the deacidification tower (401), the light component removal tower (402), and the purification tower (403) in sequence to remove residual MAA, remove light components, and remove impurities, thereby obtaining high-precision MMA. S5. Coating preparation: High-precision MMA and butyl acrylate are placed in the coating reactor (5) and stirred and polymerized by high pressure vessel (501). Initiator AIBN is added according to the ratio of 0.12g / 10mL. Then, degassing is performed by degassing machine (502) inside the coating reactor (5).

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