Production device of epoxy coating

Abstract

The utility model discloses a production device of an epoxy coating. Comprising an emulsification reactor for carrying out polymerization reaction on novolac epoxy resin and polyether amine to obtain an epoxy emulsifier, a first dispersion kettle for emulsifying and dispersing the epoxy emulsifier and an epoxy resin solution to obtain water-borne epoxy resin and a pigment filler, the emulsifying reactor, the first dispersing kettle, the second dispersing kettle and the third dispersing kettle are sequentially communicated with one another, and the emulsifying reactor, the first dispersing kettle, the second dispersing kettle and the third dispersing kettle are sequentially communicated with one another; a temporary storage tank is arranged between the first dispersion kettle and the second dispersion kettle, a grinding machine is arranged between the second dispersion kettle and the third dispersion kettle, and an outlet of the third dispersion kettle is connected to a packaging machine for packaging; the first dispersion kettle is also provided with a solvent gas outlet; and the solvent gas outlet is connected with a low-boiling-point solvent recovery unit. The production device provided by the utility model can realize continuous and stable production of the epoxy coating, and is small in environmental pollution.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating processing, specifically relates to a production device of epoxy coating. BACKGROUND

[0002] Epoxy coating is widely used in the construction industry, automobile manufacturing industry, aerospace industry, shipbuilding industry due to its strong adhesion, good mechanical properties, excellent performance such as chemical corrosion resistance. Due to the increasing attention to environmental protection at home and abroad, waterborne epoxy coating can develop rapidly, and the structure and quality of waterborne epoxy resin as the core of waterborne epoxy coating are the key to determine the performance of waterborne epoxy coating.

[0003] At present, waterborne epoxy resin is mostly produced by intermittent device, but the quality of waterborne epoxy resin obtained by intermittent production has great difference and contains more organic solvents, which not only affects the performance of epoxy coating, but also pollutes the environment, in addition, because waterborne epoxy resin is produced in the form of emulsion, long-term storage will cause the emulsion to stratify and precipitate, reduce its performance, in order to ensure that the performance of coating meets the standard, it is necessary to increase the additional resin treatment process, thereby increasing the production cost of coating and reducing the production efficiency.

[0004] Therefore, it is urgent to develop an epoxy coating production device that can improve production efficiency, improve environmental performance and improve product stability, which is of great significance to promote the development of waterborne epoxy coating industry. INVENTION CONTENTS

[0005] To solve the above technical problems, the utility model provides a production device of epoxy coating, which can realize continuous and stable production of epoxy coating and has little environmental pollution.

[0006] In order to realize the above purpose, the technical solution adopted by the utility model is:

[0007] A production device of epoxy coating, comprising: an emulsification reactor for polymeric reaction of phenolic epoxy resin and polyether amine to obtain epoxy emulsifier, a first dispersion kettle for emulsification and dispersion of epoxy emulsifier and epoxy resin solution to obtain waterborne epoxy resin, and a second dispersion kettle and a third dispersion kettle for mixing and uniformity of waterborne epoxy resin, color filler and additive to obtain epoxy coating; the emulsification reactor, the first dispersion kettle, the second dispersion kettle and the third dispersion kettle are sequentially communicated.

[0008] The first dispersion kettle is provided with a solvent gas outlet, and the solvent gas outlet is connected with a low-boiling-point solvent recovery unit.

[0009] Preferably, the emulsification reactor is provided with a phenolic epoxy resin inlet, a polyether amine inlet and an emulsifier outlet; the first dispersion kettle is provided with an emulsifier inlet, an epoxy resin inlet, a pure water inlet and a first dispersion liquid outlet; the second dispersion kettle is provided with a first dispersion liquid inlet, a pigment and filler inlet, a liquid additive inlet and a second dispersion liquid outlet; the third dispersion kettle is provided with a second dispersion liquid inlet, a solid additive inlet and an epoxy coating outlet.

[0010] The emulsifier inlet of the first dispersion kettle is in communication with the emulsifier outlet of the emulsification reactor; the first dispersion liquid inlet of the second dispersion kettle is in communication with the first dispersion liquid outlet of the first dispersion kettle, and the second dispersion liquid inlet of the third dispersion kettle is in communication with the second dispersion liquid outlet of the second dispersion kettle.

[0011] Preferably, the phenolic epoxy resin inlet of the emulsification reactor is in communication with a phenolic epoxy resin material barrel through a first heating pump, and the polyether amine inlet of the emulsification reactor is in communication with a polyether amine material barrel through a second heating pump.

[0012] Preferably, the phenolic epoxy resin material barrel and the polyether amine material barrel are respectively placed in a first preheating tank and a second preheating tank.

[0013] Preferably, the epoxy resin inlet of the first dispersion kettle is connected with an epoxy resin melt tank, the epoxy resin melt tank is provided with a high-boiling-point solvent inlet, a low-boiling-point solvent inlet and an epoxy resin outlet, the high-boiling-point solvent inlet of the epoxy resin melt tank is in communication with a high-boiling-point solvent material barrel through a first solvent pump, the low-boiling-point solvent inlet of the epoxy resin melt tank is in communication with a low-boiling-point solvent material barrel through a second solvent pump, and the epoxy resin outlet of the epoxy resin melt tank is in communication with the epoxy resin inlet of the first dispersion kettle.

[0014] Preferably, the low-boiling-point solvent recovery unit comprises a rectification recovery tower and a low-boiling-point solvent recovery tank, the rectification recovery tower is provided with a tower inlet, a tower top light component outlet and a tower bottom heavy component outlet; the tower inlet of the rectification recovery tower is in communication with the solvent gas outlet of the first dispersion kettle, and a vacuum pump is arranged on the connecting pipeline between the tower inlet of the rectification recovery tower and the solvent gas outlet of the first dispersion kettle, the tower top light component outlet of the rectification recovery tower is in communication with the inlet of the low-boiling-point solvent recovery tank, the outlet of the low-boiling-point solvent recovery tank is in communication with the inlet of the second solvent pump, and the tower bottom heavy component outlet of the rectification recovery tower is in communication with the pure water inlet of the first dispersion kettle.

[0015] Preferably, the top of the first dispersion kettle is provided with a circulating liquid inlet, an external circulating mixing unit is connected to the first dispersion liquid outlet of the first dispersion kettle, the external circulating mixing unit comprises a circulating pump and a static mixer, the first dispersion liquid outlet of the first dispersion kettle is in communication with the first dispersion liquid inlet of the second dispersion kettle and the inlet of the circulating pump through a tee joint, the outlet of the circulating pump is in communication with the inlet of the static mixer, and the outlet of the static mixer is in communication with the circulating liquid inlet of the first dispersion kettle.

[0016] Preferably, the external circulating mixing unit further comprises a first filter, the first dispersion liquid outlet of the first dispersion kettle is in communication with the inlet of the first filter, and the outlet of the first filter is in communication with the first dispersion liquid inlet of the second dispersion kettle and the inlet of the circulating pump through a tee joint.

[0017] Preferably, a temporary storage tank is arranged between the first dispersion kettle and the second dispersion kettle, the inlet of the temporary storage tank is in communication with the first dispersion liquid outlet of the first dispersion kettle or the outlet of the first filter, and the outlet of the temporary storage tank is in communication with the first dispersion liquid inlet of the second dispersion kettle.

[0018] Preferably, a grinder and a packaging machine are further included, the grinder is arranged between the second dispersion kettle and the third dispersion kettle, the packaging machine is arranged at the epoxy coating outlet of the third dispersion kettle, and a second filter is arranged between the third dispersion kettle and the packaging machine.

[0019] The present application has the following beneficial effects:

[0020] (1) The production device for epoxy coating provided by the present application comprises an emulsification reactor, a first dispersion kettle, a second dispersion kettle, a grinder, a third dispersion kettle, a filter and a packaging machine which are sequentially connected in communication, epoxy emulsifier produced continuously by the emulsification reactor and epoxy resin solution in an epoxy resin melting tank are continuously produced into waterborne epoxy resin through the first dispersion kettle, and the produced waterborne epoxy resin is directly converted into epoxy coating through the sequentially connected second dispersion kettle, grinder, third dispersion kettle, filter and packaging machine, so that the continuous production of waterborne epoxy resin and the continuous production of epoxy coating are realized, the quality of resin is improved, the consistency of resin quality is ensured, the produced waterborne epoxy resin is directly and continuously converted into epoxy coating, the production efficiency is improved, the storage and transportation of waterborne epoxy resin are reduced, the change of components or the introduction of impurities caused by the transfer and treatment of resin are avoided, the purity and high quality of epoxy coating are ensured, and the competitiveness of epoxy coating in the market is enhanced.

[0021] (2) The production device of the epoxy coating provided by the utility model, further be provided with solvent gas export in first dispersion kettle, and be provided with low boiling point solvent recovery unit in solvent gas export, can realize recycling of low boiling point solvent in waterborne epoxy resin, avoid low boiling point solvent in epoxy coating polluting environment and endangering human health after volatilization, and further reduce waste liquid discharge, reduce pollution to environment, meet the demand of environmental protection production;

[0022] (3) The production device of the epoxy coating provided by the utility model, further be provided with external circulation mixing unit composed of filter, circulating pump and static mixer outside first dispersion kettle, not only can effectively intercept and remove mechanical impurities and colloidal particles, guarantee the purity of resin, make the final epoxy coating have better quality, but also can prevent equipment wear of first dispersion kettle, prolong its service life, and the external circulation mixing unit can also shorten dispersion time, improve production efficiency, and obtain stable, small particle size and evenly dispersed waterborne epoxy resin, and the setting of the external circulation mixing unit can also reduce bubble generation in high-speed dispersion process in first dispersion kettle, protect the integrity of epoxy resin molecular chain, and ensure high quality of epoxy coating. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to clearly illustrate the technical solutions of the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0024] Figure 1 It is the structure schematic view of the embodiment 1 of the present utility model;

[0025] Figure 2 It is the structure schematic view of the embodiment 2 of the present utility model;

[0026] Figure 3 It is the structure schematic view of the embodiment 3 of the present utility model;

[0027] Figure 4 It is the structure schematic view of the embodiment 4 of the present utility model.

[0028] Figure annotation: 1, emulsification reactor; 101, phenolic epoxy resin import; 102, polyether amine import; 103, emulsifier outlet; 2, first dispersion kettle; 201, emulsifier import; 202, epoxy resin import; 203, pure water import; 204, first dispersion liquid outlet; 205, solvent gas outlet; 206, circulating liquid import; 3, second dispersion kettle; 301, first dispersion liquid import; 302, pigment and filler import; 303, liquid auxiliary import; 304, second dispersion liquid outlet; 4, third dispersion kettle; 401, second dispersion liquid import; 402, solid auxiliary import; 403, epoxy coating outlet; 5, temporary storage tank; 6, grinding machine; 7, second filter; 8, packaging machine; 9, first heating pump; 10, second heating pump; 11, phenolic epoxy resin material bucket; 12, polyether amine material bucket; 13, epoxy resin melt tank; 14, high-boiling-point solvent material bucket; 15, low-boiling-point solvent material bucket; 16, low-boiling-point solvent recovery unit; 161, rectification recovery tower; 162, low-boiling-point solvent recovery storage tank; 163, vacuum pump; 17, external circulating mixing unit; 171, first filter; 172, circulating pump; 173, static mixer; 18, first preheating groove; 19, second preheating groove. DETAILED DESCRIPTION

[0029] The utility model provides a production device of epoxy coating, for making the utility model's purpose, technical scheme and effect more clear, explicit, the following to the utility model further detailed explanation. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0030] In the description of the utility model, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0031] The utility model will be described in detail below in combination with the drawings:

[0032] Example 1

[0033] Reference Figure 1The embodiment provides a production device of epoxy coating, which comprises: an emulsification reactor 1 for polymeric reaction of phenolic epoxy resin and polyether amine to obtain an epoxy emulsifier, a first dispersion kettle 2 for emulsification and dispersion of the epoxy emulsifier and an epoxy resin solution to obtain a water-based epoxy resin, and a second dispersion kettle 3 and a third dispersion kettle 4 for mixing and uniformizing of the water-based epoxy resin, fillers and auxiliaries to obtain the epoxy coating, and the emulsification reactor 1, the first dispersion kettle 2, the second dispersion kettle 3 and the third dispersion kettle 4 are sequentially communicated; in addition, a temporary storage tank 5 is arranged between the first dispersion kettle 2 and the second dispersion kettle 3, a grinding machine 6 is arranged between the second dispersion kettle 3 and the third dispersion kettle 4, an outlet of the third dispersion kettle 4 is connected to a packaging machine 8 for packaging, and a second filter 7 is arranged between the third dispersion kettle 4 and the packaging machine 8. The production device can realize continuous production of the epoxy coating.

[0034] In the embodiment, the emulsification reactor 1 is provided with a phenolic epoxy resin inlet 101, a polyether amine inlet 102 and an emulsifier outlet 103. The phenolic epoxy resin inlet 101 of the emulsification reactor 1 is connected with a phenolic epoxy resin material barrel 11 through a first heating pump 9; the polyether amine inlet 102 of the emulsification reactor 1 is connected with a polyether amine material barrel 12 through a second heating pump 10.

[0035] The emulsification reactor 1 specifically adopts a dynamic tubular reactor. The phenolic epoxy resin and the polyether amine enter the dynamic tubular reactor. The stirring shaft and stirring blade in the reactor drive the two kinds of reaction materials to form a complex flow path in the tube, promote the mixing of the phenolic epoxy resin and the polyether amine and the polymeric reaction of the phenolic epoxy resin and the polyether amine to obtain the epoxy emulsifier.

[0036] In addition, the first heating pump 9 and the second heating pump 10 have a temperature resistance of not less than 100 DEG C. The connecting pipelines between the inlet of the first heating pump 9 and the phenolic epoxy resin material barrel 11, between the outlet of the first heating pump 9 and the emulsification reactor 1, between the inlet of the second heating pump 10 and the polyether amine material barrel 12 and between the outlet of the second heating pump 10 and the emulsification reactor 1 are all heat preservation pipelines. The heat preservation temperature of the heat preservation pipelines is 50-80 DEG C. By controlling the temperature of the heat preservation pipelines and the first heating pump 9 and the second heating pump 10, the temperature drop and solidification of the phenolic epoxy resin and the polyether amine in the conveying process are prevented, and the first heating pump 9 and the second heating pump 10 are prevented from being blocked. The heat preservation pipeline specifically adopts an electric heating heat tracing band, that is, the electric heating heat tracing band is wound on the pipeline to form the heat preservation pipeline.

[0037] The first heating pump 9 and the second heating pump 10 specifically adopt heating pumps with metering functions, so that the phenolic epoxy resin and the polyether amine enter the emulsification reactor in a certain proportion to obtain the epoxy emulsifier through polymeric reaction.

[0038] In the embodiment, the first dispersion kettle 2 is provided with an emulsifier inlet 201, an epoxy resin inlet 202, a pure water inlet 203 and a first dispersion liquid outlet 204. The emulsifier inlet 201 of the first dispersion kettle 2 is communicated with the emulsifier outlet 103 of the emulsification reactor 1 through a pipeline; the epoxy resin inlet 202 is connected with the epoxy resin melting tank 13 through a pipeline, the epoxy resin melting tank 13 is provided with a high-boiling-point solvent inlet, a low-boiling-point solvent inlet and an epoxy resin outlet, and the high-boiling-point solvent inlet of the epoxy resin melting tank 13 is communicated with the high-boiling-point solvent material tank 14 through a first solvent pump, the low-boiling-point solvent inlet of the epoxy resin melting tank 13 is communicated with the low-boiling-point solvent material tank 15 through a second solvent pump, and the epoxy resin outlet of the epoxy resin melting tank 13 is communicated with the epoxy resin inlet 202 of the first dispersion kettle 2; the pure water inlet 203 is used for introducing pure water into the first dispersion kettle 2; and the first dispersion liquid outlet 204 is communicated with the temporary storage tank 5 through a pipeline. The epoxy resin solution, the epoxy emulsifier and the pure water are mixed uniformly in the first dispersion kettle 2, and the epoxy resin is emulsified to obtain the first dispersion liquid, i.e. the water-based epoxy resin, and the water-based epoxy resin obtained by the first dispersion kettle 2 is stored in the temporary storage tank 5.

[0039] The high-boiling-point solvent and the low-boiling-point solvent of the high-boiling-point solvent material tank 14 and the low-boiling-point solvent material tank 15 enter the epoxy resin melting tank 13 through the first solvent pump and the second solvent pump respectively, the epoxy resin melting tank 13 contains melted epoxy resin, and the high-boiling-point solvent and the low-boiling-point solvent are mixed uniformly with the epoxy resin to obtain the epoxy resin solution. In the embodiment, the low-boiling-point solvent is combined with the high-boiling-point solvent, which can not only improve the dispersion degree of the epoxy resin in the solvent, but also prevent the epoxy resin particles from agglomerating and precipitating when the epoxy resin is emulsified with the epoxy emulsifier in the first dispersion kettle 2, thereby improving the stability of the emulsion, i.e. the stability of the water-based epoxy resin.

[0040] The epoxy resin melting tank 13 includes a tank body and a heat exchange jacket arranged on the outer wall of the tank body, the outer bottom of the tank body is provided with a heat exchange coil, and the heat exchange jacket and the heat exchange medium inlet of the heat exchange coil are connected with a steam pipeline. The epoxy resin in the epoxy resin melting tank 13 is heated through the heat exchange jacket and the heat exchange coil, which shortens the melting time of the epoxy resin and improves the production efficiency. Moreover, the use of steam to heat the melting tank can further improve the heating efficiency, ensure uniform heating of the melting tank, reduce the emission of harmful gases and reduce the pollution to the environment.

[0041] In addition, the connecting pipeline between the emulsifier inlet 201 of the first dispersion kettle 2 and the emulsifier outlet 103 of the emulsification reactor 1 and the connecting pipeline between the epoxy resin inlet 202 of the first dispersion kettle 2 and the epoxy resin outlet of the epoxy resin melting tank 13 are both provided with a metering pump for controlling the feeding amount of the epoxy emulsifier and the epoxy resin solution, so that the epoxy emulsifier and the epoxy resin solution enter the first dispersion kettle 2 at a certain ratio.

[0042] In the embodiment, the second dispersion kettle 3 is provided with a first dispersion liquid inlet 301, a pigment filler inlet 302, a liquid additive inlet 303, and a second dispersion liquid outlet 304. The first dispersion liquid inlet 301 of the second dispersion kettle 3 is in communication with the outlet of the temporary storage tank 5; the pigment filler inlet 302 is connected with a closed solid feeder and is used for adding pigment fillers; the liquid additive inlet 303 is connected with a liquid additive material bucket and is used for adding liquid additives; the second dispersion liquid outlet 304 is in communication with the inlet of the grinder 6 through a pipeline, and the grinder 6 specifically adopts a closed horizontal grinder. The water-based epoxy resin, the pigment filler, and the liquid additive are mixed uniformly in the second dispersion kettle to obtain a second dispersion liquid, and the second dispersion liquid obtained by the second dispersion kettle 3 is ground to a certain fineness in the grinder 6.

[0043] In addition, a metering pump is arranged on the connecting pipeline between the first dispersion liquid inlet 301 of the second dispersion kettle 3 and the temporary storage tank 5 and on the connecting pipeline between the liquid additive inlet 303 and the liquid additive material bucket, and the closed solid feeder can control the feeding period and the single feeding amount, so as to control the water-based epoxy resin, the pigment filler, and the liquid additive to be mixed uniformly in the second dispersion kettle 3 at a certain ratio to obtain the second dispersion liquid.

[0044] In the embodiment, the third dispersion kettle 4 is provided with a second dispersion liquid inlet 401, a solid additive inlet 402, and an epoxy coating outlet 403. The second dispersion liquid inlet 401 of the third dispersion kettle 4 is in communication with the outlet of the grinder 6 through a pipeline, and a conveying pump is arranged on the connecting pipeline between the second dispersion liquid inlet 401 and the outlet of the grinder 6; the solid additive inlet 402 is connected with a closed solid feeder and is used for adding solid additives; and the epoxy coating outlet 403 is in communication with the inlet of the second filter 7 through a pipeline. In the third dispersion kettle 4, the second dispersion liquid is adjusted to obtain a third dispersion liquid, i.e., an epoxy coating, by adding a thickening agent and other solid additives to adjust the viscosity and color of the second dispersion liquid; then the epoxy coating is filtered through the second filter 7, and the filtered epoxy coating is conveyed to the packaging machine 8 for packaging through the conveying pump.

[0045] The second filter 7 specifically adopts a closed bag filter, which includes a filter cylinder body with an inlet and an outlet and a filter bag arranged in the filter cylinder body. After the epoxy coating enters the closed bag filter, the filter bag filters the colloidal particles and mechanical impurities, the impurities are intercepted in the filter bag, and the filtered epoxy coating flows out from the outlet, so as to realize the separation of the product and the impurities.

[0046] The production device of the embodiment can realize the continuous production of the epoxy coating, and the production process is as follows:

[0047] The phenolic epoxy resin and the polyether amine are heated by the first heating pump and the second heating pump respectively and are transported to the emulsification reactor, the phenolic epoxy resin and the polyether amine are polymerized in the emulsification reactor to obtain an epoxy emulsifier; the high-boiling-point solvent and the low-boiling-point solvent are respectively transported into the epoxy resin melt tank containing the melted epoxy resin by the first solvent pump and the second solvent pump, and are mixed with the epoxy resin uniformly to obtain an epoxy resin solution; the epoxy resin solution in the epoxy resin melt tank and the epoxy emulsifier in the emulsification reactor are transported into the first dispersion kettle according to a certain proportion, and pure water is added into the first dispersion kettle to emulsify and disperse the epoxy resin to obtain a first dispersion liquid, i.e. the water-based epoxy resin; the water-based epoxy resin obtained from the first dispersion kettle is collected into a temporary storage tank for storage, and then is transported into the second dispersion kettle by the metering pump, and liquid additives and pigments and fillers are added into the second dispersion kettle at the same time, and the second dispersion liquid is obtained after being dispersed uniformly in the second dispersion kettle; the second dispersion liquid obtained from the second dispersion kettle is ground to a certain fineness by the grinding machine, and then is transported into the third dispersion kettle by the metering pump, and solid additives such as thickening agents are added to adjust the viscosity and color of the second dispersion liquid to obtain a third dispersion liquid, i.e. the epoxy coating; then the epoxy coating is filtered by the closed bag filter to remove colloidal particles and mechanical impurities, and is packaged by the packaging machine to obtain the packaged finished product of the epoxy coating.

[0048] Example 2

[0049] With reference to Figure 2 The difference between the present embodiment and the embodiment 1 is that the top of the first dispersion kettle 2 is further provided with a solvent gas outlet 205, and the solvent gas outlet 205 is connected with a low-boiling-point solvent recovery unit 16. The low-boiling-point solvent recovery unit 16 is used to remove the low-boiling-point solvent in the water-based epoxy resin obtained from the first dispersion kettle 2, so as to avoid the influence of the low-boiling-point solvent on the performance of the epoxy coating finished product, and prevent the low-boiling-point solvent from polluting the environment and harming human health after volatilization. Therefore, the low-boiling-point solvent in the water-based epoxy resin needs to be removed after the epoxy resin solution is dispersed and emulsified.

[0050] The low-boiling-point solvent recovery unit 16 includes a rectification recovery tower 161 and a low-boiling-point solvent recovery tank 162, and the rectification recovery tower 161 is provided with a tower inlet, a tower top light component outlet and a tower bottom heavy component outlet. The tower inlet of the rectification recovery tower 161 is connected with the solvent gas outlet 205 of the first dispersion kettle 2 by a pipeline, and a vacuum pump 163 is arranged on the connecting pipeline between the tower inlet of the rectification recovery tower 161 and the solvent gas outlet 205 of the first dispersion kettle 2. The tower top light component outlet of the rectification recovery tower 161 is connected with the inlet of the low-boiling-point solvent recovery tank 162 by a pipeline, and the outlet of the low-boiling-point solvent recovery tank 162 is connected with the inlet of the second solvent pump by a pipeline. The tower bottom heavy component outlet of the rectification recovery tower 161 is connected with the pure water inlet 203 of the first dispersion kettle 2 by a pipeline.

[0051] In the above embodiment 1, on the basis of the above, in this embodiment, the epoxy resin solution is dispersed and emulsified in the first dispersion kettle, under the action of the vacuum pump, the low boiling point solvent in the first dispersion kettle is extracted by negative pressure, the extracted gas contains part of water and a small amount of high boiling point solvent in addition to the low boiling point solvent, and the gas enters the rectification recovery tower for rectification recovery. Among them, the low boiling point solvent enters the low boiling point solvent recovery tank from the light component outlet at the top of the tower and is stored, and the recovered low boiling point solvent is transported to the epoxy resin melt tank by the second solvent pump again to participate in the preparation of the epoxy resin solution; and the water and a small amount of high boiling point solvent form heavy components at the bottom and enter the pure water inlet of the first dispersion kettle from the heavy component outlet at the bottom, that is, enter the first dispersion kettle to continue to participate in the dispersion and emulsification process of the epoxy resin solution.

[0052] The low boiling point solvent recovery unit provided in this embodiment can realize the recycling of the low boiling point solvent in the water-based epoxy resin, avoid the pollution of the environment and harm to human health caused by the volatilization of the low boiling point solvent in the epoxy coating, and also reduce the discharge of waste liquid.

[0053] Embodiment 3

[0054] Reference Figure 3 The embodiment provides an epoxy coating production device, which is different from that of embodiment 2 in that the embodiment further comprises an external circulation mixing unit 17 for strengthening the dispersion of the first dispersion liquid in the first dispersion kettle 2, and the top of the first dispersion kettle 2 is provided with a circulating liquid inlet 206, and the first dispersion liquid outlet 204 of the first dispersion kettle 2, the external circulation mixing unit 17 and the circulating liquid inlet 206 form a circulation.

[0055] Specifically, in this embodiment, the external circulation mixing unit 17 comprises a first filter 171, a circulating pump 172 and a static mixer 173. Among them, the first dispersion liquid outlet 204 of the first dispersion kettle 2 and the inlet of the first filter 171 are communicated through a pipeline, the outlet of the first filter 171 is communicated with the inlet of the temporary storage tank 5 and the inlet of the circulating pump 172 through a three-way pipe and a pipeline respectively, the outlet of the circulating pump 172 is communicated with the inlet of the static mixer 173 through a pipeline, and the outlet of the static mixer 173 is communicated with the circulating liquid inlet 206 of the first dispersion kettle 2 through a pipeline.

[0056] The above first filter 171 specifically adopts a Y-type filter.

[0057] On the basis of the above-mentioned embodiment 2, in the present embodiment, during the process of dispersing and emulsifying the epoxy resin solution in the first dispersion kettle, the first dispersion liquid in the first dispersion kettle flows out from the first dispersion liquid outlet, and after filtering the mechanical impurities and colloidal particles through the first filter, a filtered liquid is obtained, part of the filtered liquid is transported to the static mixer through the circulating pump for forced mixing, and then returned to the first dispersion kettle through the circulating liquid inlet, so as to be mixed again with the dispersion liquid in the first dispersion kettle, and part of the filtered liquid is stored in the temporary storage tank.

[0058] In the present embodiment, the first dispersion kettle adopts external circulation forced mixing, which not only can shorten the dispersion time, improve the production efficiency, obtain stable, small particle size and uniformly dispersed waterborne epoxy resin, but also can reduce the generation of bubbles in the high-speed dispersion process, protect the integrity of the epoxy resin molecular chain, and ensure the high quality of the paint.

[0059] Embodiment 4

[0060] With reference to Figure 4 The present embodiment provides a production device for epoxy paint, which is different from that of embodiment 3 in that the present embodiment is further provided with a first preheating tank 18 and a second preheating tank 19, and the above-mentioned phenolic epoxy resin material barrel 11 and polyether amine material barrel 12 are respectively placed in the first preheating tank 18 and the second preheating tank 19, and the first preheating tank 18 and the second preheating tank 19 contain constant temperature hot water at 50-80℃.

[0061] The first preheating tank 18 and the second preheating tank 19 can specifically adopt electric heating to maintain the water temperature in the tank.

[0062] On the basis of the above-mentioned embodiment 3, in the present embodiment, the phenolic epoxy resin material barrel and the polyether amine material barrel are respectively placed in the first preheating tank and the second preheating tank, and the phenolic epoxy resin and the polyether amine are heated to a molten state by using the constant temperature hot water at 50-80℃ in the first and second preheating tanks, so as to facilitate the first heating pump and the second heating pump to respectively extract the materials in the material barrels and transport them to the emulsification reactor.

[0063] It should be noted that, in order to ensure the continuous production of the production device, according to the transportation requirements between the devices, pumping devices such as ordinary conveying pumps or metering pumps with metering function are arranged on the connecting pipelines between the devices, and valve fittings are also arranged on the connecting pipelines between the devices, so as to control the corresponding devices to be closed when unexpected situations or maintenance occur.

[0064] In addition, in the utility model, unless another definite provision or limitation, the communication mode between each device should be understood in broad sense. For example, it can be direct pipeline communication, also can be through the pipeline communication of conventional conveying, metering, control, temporary storage device such as pumping equipment, metering equipment, valve pipe fitting, intermediate tank, can be fixed communication, also can be detachable communication. For the person skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to specific circumstances.

[0065] In addition, in the utility model, each component of production device, such as heating pump, dynamic tubular reactor, melt tank, dispersion kettle, rectification recovery tower, Y type filter, static mixer, preheating tank, temporary storage tank, closed solid feeder, grinder, closed bag filter, packaging machine and the like can be commercially available from the market, but the whole reaction device cannot be commercially available from the market, and is not known to the person skilled in the art.

[0066] Of course, the above description is not a limitation of the utility model, and the utility model is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the essential scope of the utility model should also belong to the protection scope of the utility model.

Claims

1. An epoxy coating production apparatus, characterized in that, The application relates to an epoxy coating preparation device. The device comprises an emulsification reactor (1) for the polymerization reaction of phenolic epoxy resin and polyether amine to obtain an epoxy emulsifier, a first dispersion kettle (2) for the emulsification and dispersion of the epoxy emulsifier and an epoxy resin solution to obtain a water-based epoxy resin, and a second dispersion kettle (3) and a third dispersion kettle (4) for the mixing and uniformity of the water-based epoxy resin, fillers and additives to obtain an epoxy coating; the emulsification reactor (1), the first dispersion kettle (2), the second dispersion kettle (3) and the third dispersion kettle (4) are sequentially communicated. The first dispersion kettle (2) is provided with a solvent gas outlet (205) connected with a low-boiling-point solvent recovery unit (16).

2. The apparatus for producing an epoxy coating according to claim 1, wherein The emulsification reactor (1) is provided with a phenolic epoxy resin inlet (101), a polyether amine inlet (102) and an emulsifier outlet (103); the first dispersion kettle (2) is provided with an emulsifier inlet (201), an epoxy resin inlet (202), a pure water inlet (203) and a first dispersion liquid outlet (204); the second dispersion kettle (3) is provided with a first dispersion liquid inlet (301), a filler inlet (302), a liquid additive inlet (303) and a second dispersion liquid outlet (304); and the third dispersion kettle (4) is provided with a second dispersion liquid inlet (401), a solid additive inlet (402) and an epoxy coating outlet (403). The emulsifier inlet (201) of the first dispersion kettle (2) is communicated with the emulsifier outlet (103) of the emulsification reactor (1); the first dispersion liquid inlet (301) of the second dispersion kettle (3) is communicated with the first dispersion liquid outlet (204) of the first dispersion kettle (2); and the second dispersion liquid inlet (401) of the third dispersion kettle (4) is communicated with the second dispersion liquid outlet (304) of the second dispersion kettle (3).

3. The apparatus for producing an epoxy paint according to claim 2, wherein The phenolic epoxy resin inlet (101) of the emulsification reactor (1) is communicated with a phenolic epoxy resin material barrel (11) through a first heating pump (9); and the polyether amine inlet (102) of the emulsification reactor (1) is communicated with a polyether amine material barrel (12) through a second heating pump (10).

4. The apparatus for producing an epoxy paint according to claim 3, wherein The phenolic epoxy resin material barrel (11) and the polyether amine material barrel (12) are respectively placed in a first preheating tank (18) and a second preheating tank (19).

5. The apparatus for producing an epoxy paint according to claim 2, wherein The epoxy resin inlet (202) of the first dispersion kettle (2) is connected with an epoxy resin melting tank (13) provided with an epoxy resin outlet, a high-boiling-point solvent inlet and a low-boiling-point solvent inlet; the high-boiling-point solvent inlet of the epoxy resin melting tank (13) is communicated with a high-boiling-point solvent material barrel (14) through a first solvent pump; the low-boiling-point solvent inlet of the epoxy resin melting tank (13) is communicated with a low-boiling-point solvent material barrel (15) through a second solvent pump; and the epoxy resin outlet of the epoxy resin melting tank (13) is communicated with the epoxy resin inlet (202) of the first dispersion kettle (2).

6. The apparatus for producing an epoxy coating according to claim 2, wherein The low-boiling-point solvent recovery unit (16) comprises a rectification recovery tower (161) and a low-boiling-point solvent recovery tank (162), the rectification recovery tower (161) is provided with a tower inlet, a tower top light component outlet and a tower bottom heavy component outlet; the tower inlet of the rectification recovery tower (161) is communicated with the solvent gas outlet (205) of the first dispersion kettle (2), and a vacuum pump (163) is arranged on the connecting pipeline between the tower inlet of the rectification recovery tower (161) and the solvent gas outlet (205) of the first dispersion kettle (2); the tower top light component outlet of the rectification recovery tower (161) is communicated with the inlet of the low-boiling-point solvent recovery tank (162), the outlet of the low-boiling-point solvent recovery tank (162) is communicated with the inlet of the second solvent pump, and the tower bottom heavy component outlet of the rectification recovery tower (161) is communicated with the pure water inlet (203) of the first dispersion kettle (2).

7. The apparatus for producing an epoxy coating according to claim 2, wherein The top of the first dispersion kettle (2) is provided with a circulating liquid inlet (206), the first dispersion liquid outlet (204) of the first dispersion kettle (2) is connected with an external circulating mixing unit (17), the external circulating mixing unit (17) comprises a circulating pump (172) and a static mixer (173), the first dispersion liquid outlet (204) of the first dispersion kettle (2) is communicated with the first dispersion liquid inlet (301) of the second dispersion kettle (3) and the inlet of the circulating pump (172) through a three-way pipe respectively, the outlet of the circulating pump (172) is communicated with the inlet of the static mixer (173), and the outlet of the static mixer (173) is communicated with the circulating liquid inlet (206) of the first dispersion kettle (2).

8. The apparatus for producing an epoxy paint according to claim 7, wherein The external circulating mixing unit (17) further comprises a first filter (171), the first dispersion liquid outlet (204) of the first dispersion kettle (2) is communicated with the inlet of the first filter (171), and the outlet of the first filter (171) is communicated with the first dispersion liquid inlet (301) of the second dispersion kettle (3) and the inlet of the circulating pump (172) through a three-way pipe respectively.

9. The apparatus for producing an epoxy paint according to claim 8, wherein The first dispersion kettle (2) and the second dispersion kettle (3) are provided with a temporary storage tank (5); the inlet of the temporary storage tank (5) is communicated with the first dispersion liquid outlet (204) of the first dispersion kettle (2) or the outlet of the first filter (171), and the outlet of the temporary storage tank (5) is communicated with the first dispersion liquid inlet (301) of the second dispersion kettle (3).

10. An apparatus for producing an epoxy coating according to any one of claims 2 to 9, characterized in that, Further comprising a grinding machine (6) and a packaging machine (8); the grinding machine (6) is arranged between the second dispersion kettle (3) and the third dispersion kettle (4), the packaging machine (8) is arranged at the epoxy coating outlet (403) of the third dispersion kettle (4), and the second filter (7) is arranged between the third dispersion kettle (4) and the packaging machine (8).

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