Production device of phenolic epoxy anticorrosive paint

Abstract

The utility model discloses a production device of phenolic epoxy anticorrosive paint, which comprises an ingredient conveying unit, a first reaction unit, a cooling unit, a second reaction unit, a refining unit, a post-treatment unit and a filling unit which are sequentially communicated, and further comprises a waste gas collecting unit and a waste gas treatment unit, the batching conveying unit comprises a batching tank and a metering pump arranged at a discharge port of the batching tank, the first reaction unit comprises at least two stages of serially connected dynamic tubular reactors or overflow kettles, the cooling unit comprises at least one stage of heat exchanger, and the second reaction unit comprises at least one stage of overflow kettle. The refining unit comprises a desalting kettle, an oil-water separator and a rectifying tower which are communicated in sequence, the post-processing unit comprises a dispersing cylinder, a grinding machine, a color mixing cylinder and a filter which are communicated in sequence, and the filling unit comprises a filling machine and a conveying line arranged below the filling machine. The device realizes continuous production of the coating, is high in production efficiency and stable in product quality, and can also treat waste gas to prevent environmental pollution.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to a production device for phenolic epoxy anti-corrosion coating. Background Technology

[0002] Phenolic epoxy anticorrosive coatings are widely used in petroleum, chemical, power, machinery, and ship coating industries due to their excellent chemical resistance, heat resistance, and adhesion. Currently, the production process of phenolic epoxy anticorrosive coatings typically involves multiple steps, including phenol resin polycondensation reaction, dispersion, grinding, color matching, and filling. These steps are often operated independently, leading to inconsistent raw material ratios, reaction conditions, and mixing degrees between batches. This results in inconsistent coating quality, affecting the coating's application performance. Furthermore, the frequent start-up and shutdown of equipment during production accelerates equipment wear, increases maintenance costs, and reduces production efficiency due to the discontinuous process. Additionally, phenolic resin is easily oxidized during preparation, affecting product quality, and the production process generates waste gas, which, if not properly treated, can severely pollute the environment. Therefore, there is an urgent need to develop an environmentally friendly production device for phenolic epoxy anticorrosive coatings. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a production device for phenolic epoxy anticorrosive coatings, which can realize continuous production of phenolic epoxy anticorrosive coatings, with high production efficiency and stable quality during the production process. Moreover, the production device can treat waste gas to prevent environmental pollution.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A production apparatus for phenolic epoxy anticorrosive coatings includes:

[0006] A batching and conveying unit for preparing and conveying reactants, the batching and conveying unit including a batching tank for preparing reactants and a metering pump disposed at the outlet of the batching tank;

[0007] A first reaction unit is used to provide a site for the polycondensation reaction of phenolic compounds and aldehyde compounds. The inlet of the first reaction unit is connected to the outlet of the batching and conveying unit, and the first reaction unit includes at least two temperature control zones.

[0008] A cooling unit for cooling the phenolic resin reactant generated in the first reaction unit, wherein the inlet of the cooling unit is connected to the outlet of the first reaction unit.

[0009] A second reaction unit is used to provide a site for the reaction of phenolic resin, a reactant generated by the first reaction unit, with epichlorohydrin. The inlet of the second reaction unit is connected to the outlet of the cooling unit.

[0010] A refining unit for refining and removing impurities from the phenolic epoxy resin produced by the second reaction unit, wherein the inlet of the refining unit is connected to the outlet of the second reaction unit.

[0011] A post-processing unit is used to disperse, grind, color adjust, and filter phenolic epoxy resin after it has been processed by the refining unit. The inlet of the post-processing unit is connected to the outlet of the refining unit.

[0012] A filling unit for filling the phenolic epoxy resin coating obtained from the post-processing unit, wherein the filling unit is connected to the discharge port of the post-processing unit.

[0013] Waste gas treatment unit used to treat waste gas generated by production equipment.

[0014] Furthermore, the batching and conveying unit also includes a phenolic compound storage tank, an aldehyde compound storage tank, and a heating tank or heating vessel for heating the phenolic compound storage tank. The outlets of the phenolic compound storage tank and the aldehyde compound storage tank are connected to the inlet of the batching tank through pipelines. A metering pump is installed on the pipeline between the outlets of the phenolic compound storage tank and the aldehyde compound storage tank and the batching tank. The phenolic compound storage tank is located inside the heating vessel or the heating pipe is arranged around the outer wall of the phenolic compound storage tank.

[0015] Furthermore, the first reaction unit, the cooling unit, and the second reaction unit are all equipped with temperature sensors for monitoring the material temperature and heat exchange systems for heat exchange. The heat exchange system is equipped with a heat exchange medium inlet and a heat exchange medium outlet, and a metering pump is installed before the heat exchange medium inlet. The temperature sensor and the metering pump are connected to the TCU temperature control system via wires.

[0016] Furthermore, the first reaction unit includes at least two stages of dynamic tubular reactors connected in series or at least two stages of overflow tanks connected in series, and each stage of dynamic tubular reactor or overflow tank is provided with an alkali inlet.

[0017] The cooling unit includes at least one heat exchanger;

[0018] The second reaction unit includes at least one overflow vessel, and the overflow vessel is provided with an epichlorohydrin inlet and an alkali inlet. Preferably, the second reaction unit includes two overflow vessels, and the first overflow vessel is provided with an epichlorohydrin inlet and the second overflow vessel is provided with an alkali inlet.

[0019] Furthermore, the refining unit includes a desalting kettle, an oil-water separator, and a distillation column. The inlet of the desalting kettle is connected to the outlet of the second reaction unit via a pipeline. The outlet of the desalting kettle is connected to the inlet of the oil-water separator. The oil phase outlet of the oil-water separator is connected to the inlet of the distillation column. The heavy component outlet at the bottom of the distillation column is connected to the inlet of the post-processing unit.

[0020] Furthermore, a temporary storage tank is provided between the refining unit and the post-processing unit. The discharge port of the heavy component at the bottom of the distillation column is connected to the inlet of the temporary storage tank via a pipeline, and the discharge port of the temporary storage tank is connected to the inlet of the post-processing unit via a pipeline.

[0021] Furthermore, the post-processing unit includes a dispersion cylinder, a grinder, a color mixing cylinder, and a filter that are connected in sequence via pipelines;

[0022] The cylinder cover of the dispersion cylinder is equipped with a sealed solid feeder, an air vent, and an observation port.

[0023] The grinding machine is externally equipped with a water-cooled circulating jacket for controlling the grinding temperature.

[0024] The color mixing tank is equipped with a pigment inlet and a solvent inlet for adjusting color and viscosity, respectively.

[0025] Furthermore, the filling unit includes a filling machine and a conveyor line disposed below the filling machine. A filter screen is disposed inside the filling machine and above the discharge port of the filling machine, and the filter screen has a mesh size of 100 to 500 mesh.

[0026] Furthermore, it also includes an exhaust gas collection unit, which includes a first gas collection hood, a second gas collection hood, and a third gas collection hood for collecting exhaust gases generated by the batching and conveying unit, the post-processing unit, and the filling unit, respectively; the first gas collection hood is installed at the outlet of the heating tank containing the phenolic compound storage tank or at the outlet of the phenolic compound storage tank whose outer wall is surrounded by heating pipes; the second gas collection hood is installed at the air inlet of the dispersion cylinder; and the third gas collection hood is installed at the discharge port of the filling machine.

[0027] Furthermore, the outlets of the first, second, and third gas collection hoods are respectively connected to the inlet of the exhaust gas main pipe via pipelines. The outlet of the exhaust gas main pipe is connected to the exhaust gas treatment unit. The exhaust gas treatment unit includes a pulse-jet bag filter, a three-stage dry filter, a zeolite rotary adsorption and concentration device, and a combustion furnace, which are connected in sequence via pipelines.

[0028] The beneficial effects of this utility model are as follows:

[0029] (1) This utility model provides a production device for phenolic epoxy anticorrosive coatings, which includes a batching and conveying unit, a first reaction unit, a cooling unit, a second reaction unit, a refining unit, a post-processing unit, and a filling unit connected in sequence. A mixture of phenolic compounds and aldehyde compounds is continuously input into the first reaction unit and the second reaction unit, and undergoes condensation, etherification, and cyclization reactions in sequence, respectively, to achieve continuous output of phenolic epoxy resin. The output phenolic epoxy resin, after refining, can be directly used to produce phenolic epoxy anticorrosive coatings. This production device realizes the continuous production of phenolic epoxy anticorrosive coatings, improving the production efficiency of anticorrosive coatings; and the production... During the production process, the batching and conveying unit can control the ratio of phenolic compounds and aldehyde compounds through metering pumps, and control the amount of the mixture of phenolic compounds and aldehyde compounds entering the first reaction unit. This allows for more precise raw material ratios and reduces the quality differences between different batches of coating products caused by different raw material ratios. In addition, continuous production also reduces fluctuations in reaction conditions caused by different operators, further resulting in high-quality phenolic epoxy anticorrosive coatings with stable and uniform quality. At the same time, using this production device to achieve continuous production of phenolic epoxy anticorrosive coatings can also reduce the start-up and shutdown frequency of each piece of equipment, reduce equipment wear, and lower equipment maintenance costs.

[0030] (2) This utility model provides a production device for phenolic epoxy anti-corrosion coating, and is also equipped with a TCU temperature control system, a temperature sensor for monitoring the material temperature in the first reaction unit, the cooling unit, and the second reaction unit, and a metering pump for adjusting the flow rate of the heat exchange medium in the first reaction unit, the cooling unit, and the second reaction unit. The temperature sensor and the metering pump are electrically connected to the TCU temperature control system. The temperature sensor monitors the material temperature in real time and feeds the temperature back to the TCU temperature control system. If the material temperature fed back by a certain temperature sensor is not within the set range, the TCU temperature control system adjusts the flow rate of the corresponding heat exchange medium according to the real-time feedback signal, thereby adjusting the material temperature within the set range. This avoids the waste of raw materials due to temperature fluctuations and avoids the occurrence of reaction runaway or safety accidents due to abnormal temperature, ensuring stable production and improving the quality and quality stability of the product.

[0031] (3) This utility model provides a production device for phenolic epoxy anti-corrosion coating, which is also equipped with a gas collection hood for collecting waste gas and a waste gas treatment unit for treating the collected waste gas. The toxic waste gas generated during the production process is collected by the gas collection hood, and then discharged after dust removal, filtration, adsorption and combustion by the waste gas treatment unit. The exhaust gas emission meets the national emission standards, which not only effectively avoids the escape of toxic waste gas and reduces environmental pollution, but also ensures the personal health of the workers during the production process. Attached Figure Description

[0032] To clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the production device according to Embodiment 1 of this utility model;

[0034] Figure 2 This is a connection diagram of the TCU temperature control system in Embodiment 2 of this utility model;

[0035] Figure 3 This is a schematic diagram of the waste gas treatment unit of Embodiment 3 of this utility model.

[0036] The diagram is labeled as follows: 1. Batching and conveying unit; 101. Phenolic compound storage tank; 102. Aldehyde compound storage tank; 103. Batching tank; 2. First reaction unit; 201. Dynamic tubular reactor; 3. Cooling unit; 301. Heat exchanger; 4. Second reaction unit; 401. Overflow vessel; 5. Refining unit; 501. Desalination vessel; 502. Oil-water separator; 503. Distillation column; 6. Temporary storage tank; 7. Post-treatment unit; 701. Dispersion tank; 702. Grinding mill; 703. Color mixing tank; 704. Filter; 705. Closed solid feeder; 8. Filling unit; 801. Filling machine; 802. Conveyor line; 9. Waste gas treatment unit; 901. Pulse-jet bag filter; 902. Three-stage dry filter; 903. Zeolite rotor adsorption and concentration device; 904. Combustion furnace; 10. Waste gas main. Detailed Implementation

[0037] This utility model provides a production apparatus for phenolic epoxy anticorrosive coatings. To make the objectives, technical solutions, and effects of this utility model clearer and more explicit, the following provides a more detailed description. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0038] In the description of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] The present invention will now be described in detail with reference to the accompanying drawings.

[0040] This utility model provides a production apparatus for phenolic epoxy anticorrosive coatings, which is used to continuously prepare phenolic epoxy anticorrosive coatings using phenolic compounds and aldehyde compounds. The production apparatus specifically includes: a batching and conveying unit, a first reaction unit, a cooling unit, a second reaction unit, a refining unit, a post-processing unit, and a filling unit connected in sequence. The continuous production of phenolic epoxy anticorrosive coatings is realized through this production apparatus.

[0041] Specifically, the aforementioned batching and conveying unit is used to batch phenolic compounds and aldehyde compounds according to the specified ratio and convey the prepared reaction materials to the first reaction unit. The phenolic compounds are one or more of phenol, cresol, and xylenol, and the aldehyde compounds are one or more of formaldehyde, acetaldehyde, and furfural.

[0042] In a preferred embodiment of this utility model, the above-mentioned batching and conveying unit includes a phenolic compound storage tank, an aldehyde compound storage tank, and a batching tank for preparing reaction materials. The outlet of the batching tank is equipped with a metering pump for controlling the flow rate of the mixed reaction materials of phenolic compounds and aldehyde compounds entering the first reaction unit. The outlets of the phenolic compound storage tank and the aldehyde compound storage tank are connected to the inlet of the batching tank through pipelines. Metering pumps are installed on the pipelines between the outlets of the phenolic compound storage tank and the aldehyde compound storage tank and the batching tank to control the ratio of phenolic compounds and aldehyde compounds entering the batching tank.

[0043] In a preferred embodiment of this invention, the above-mentioned batching and conveying unit further includes a heating tank for heating the phenolic compound storage tank. The phenolic compound storage tank is placed inside the heating tank, or a heating pipe is surrounded on the outer wall of the phenolic compound storage tank. The phenolic compounds in the phenolic compound storage tank are melted by heating and then pumped into the batching tank by a metering pump. The molten phenolic compounds and aldehyde compounds in the batching tank can be better mixed, thereby accelerating the reaction process and improving the reaction efficiency.

[0044] In a preferred embodiment of this utility model, the above-mentioned mixing tank can be a stirring vessel with a stirring function, so as to mix the phenolic compounds and aldehyde compounds evenly.

[0045] In a preferred embodiment of this utility model, the heating tank is specifically heated by a steam coil, which is arranged around the inner surface of the heating tank.

[0046] Specifically, the aforementioned first reaction unit provides a site for the condensation reaction of phenolic compounds and aldehyde compounds under alkaline conditions, and within the first reaction unit, the phenolic compounds and aldehyde compounds condense to form phenolic resin. The aforementioned first reaction unit is connected to the outlet of the mixing tank via a pipeline.

[0047] In a preferred embodiment of this invention, the first reaction unit includes at least two temperature-controlled zones, preferably two temperature-controlled zones. The temperature of the first temperature-controlled zone is preferably controlled at 60–80°C, and the temperature of the second temperature-controlled zone is preferably controlled at 90–120°C. In the first reaction unit, aldehyde compounds and phenolic compounds undergo an addition reaction in the first temperature-controlled zone to obtain an addition reaction solution. Initially, a lower temperature is beneficial for controlling the reaction rate. Then, the addition reaction solution enters the second temperature-controlled zone, where the increased reaction temperature facilitates intermolecular condensation reactions, forming longer chain structures, thereby obtaining a phenolic resin with uniform molecular weight distribution and good performance.

[0048] In addition, in order to realize the reaction process of the first reaction unit in two temperature control zones with different temperatures, the first reaction unit includes at least two stages of dynamic tubular reactors connected in series or at least two stages of overflow vessels connected in series. Preferably, the first reaction unit includes two stages of dynamic tubular reactors connected in series or two stages of overflow vessels connected in series.

[0049] The dynamic tubular reactor used in the first reaction unit includes a reaction chamber, a stirring shaft inside the reaction chamber, a heat exchange system outside the reaction chamber, and a drive motor at the outer end of the reaction chamber to drive the stirring shaft. The reactor also has an inlet, an outlet, and an alkali inlet connected to the reaction chamber. The mixed reactants in the mixing tank enter the reaction chamber through the inlet via a metering pump for reaction. The reacted material is discharged through the outlet. The alkali inlet is used to add alkali. The heat exchange system outside the reaction chamber is a jacket with a heat exchange medium inlet and an outlet. A metering pump for controlling the flow rate of the heat exchange medium is installed before the heat exchange medium inlet. The stirring shaft is a hollow shaft closed at both ends, also with a heat exchange medium inlet and an outlet. A metering pump for controlling the flow rate of the heat exchange medium is also installed at the heat exchange medium inlet. The jacket and hollow stirring shaft are filled with heat exchange medium to exchange heat with the reactants in the reaction chamber. The flow rate of the heat exchange medium is adjusted by a metering pump to regulate the heat exchange efficiency and thus control the reaction temperature of the first reaction unit.

[0050] The overflow vessel used in the first reaction unit includes a vessel body, a stirring shaft inside the vessel body, a heat exchange system outside the vessel body, and a drive motor on the top of the vessel body for driving the stirring shaft. The overflow vessel body also has a feed inlet, an overflow outlet, and an alkali inlet communicating with the interior of the vessel body. Preferably, the feed inlet and alkali inlet are located at the bottom of the vessel body. Alternatively, if the feed inlet or alkali inlet is located at the top of the vessel body, a feed pipe needs to be inserted from the feed inlet or alkali inlet so that the outlet end of the feed pipe is located at the bottom of the vessel body. The overflow outlet is preferably located at the top of the vessel body. During production, the mixed reactants in the mixing tank enter the vessel body through the feed inlet of the overflow vessel via a metering pump for reaction. The reactants generated flow out through the overflow outlet. The alkali inlet is used to add alkali. The heat exchange system outside the vessel body is specifically a jacket, with a heat exchange medium inlet and a heat exchange medium outlet. A metering pump for controlling the flow rate of the heat exchange medium is installed before the heat exchange medium inlet on the jacket. The jacket is circulated with a heat exchange medium to exchange heat with the reactants inside the reactor. The flow rate of the heat exchange medium is adjusted by a metering pump to regulate the heat exchange efficiency and thus control the reaction temperature of the first reaction unit.

[0051] In addition, to achieve automatic control of the reaction temperature of the first reaction unit, a temperature sensor for monitoring the material temperature is also installed on the first reaction unit. Specifically, an instrument interface connected to the inside of the reaction chamber or the inside of the vessel can be installed on the dynamic tubular reactor or overflow vessel used in the first reaction unit. The temperature sensor is connected through the instrument interface, and the temperature sensor and the metering pump installed at the inlet of the heat exchange medium are connected to the TCU temperature control system through wires. The TCU temperature system sets the temperature range of the two temperature control zones of the first reaction unit. During the production process, the temperature sensor monitors the reaction temperature in real time and feeds the temperature back to the TCU temperature control system. The TCU temperature control system adjusts the flow rate of the heat exchange medium according to the real-time feedback signal, thereby regulating the reaction temperature and realizing automatic and precise temperature control of the first reaction unit, effectively preventing possible temperature runaway during the reaction process.

[0052] Specifically, the cooling unit is used to cool the phenolic resin produced by the first reaction unit, thereby mitigating the adverse effects of decomposition or oxidation of the phenolic resin in the polycondensation reaction solution under high-temperature conditions. The cooling unit is connected to the outlet of the first reaction unit via a pipeline.

[0053] In a preferred embodiment of this invention, the cooling unit includes at least one heat exchanger, preferably two stages of heat exchangers connected in series, and the heat exchangers are preferably shell-and-tube heat exchangers. When the cooling unit uses two stages of shell-and-tube heat exchangers connected in series, the inlet of the tube side of the first stage shell-and-tube heat exchanger is connected to the outlet of the first reaction unit, the outlet of the tube side of the first stage shell-and-tube heat exchanger is connected to the inlet of the tube side of the second stage shell-and-tube heat exchanger, and the outlet of the tube side of the second stage shell-and-tube heat exchanger is connected to the second reaction unit. Furthermore, the shell side of the aforementioned shell-and-tube heat exchanger is provided with a heat exchange medium inlet and a heat exchange medium outlet, and the heat exchange medium inlet on the shell side of the shell-and-tube heat exchanger is equipped with a metering pump for controlling the flow rate of the heat exchange medium.

[0054] In addition, to achieve automatic control of the cooling temperature of the cooling unit, a temperature sensor for monitoring the material temperature is also installed on the cooling unit. Specifically, an instrument interface connected to the tube side can be installed on the heat exchanger used in the cooling unit. The temperature sensor is connected through the instrument interface, and the temperature sensor and the metering pump installed at the inlet of the heat exchange medium are connected to the TCU temperature control system through wires. During the cooling process, the temperature sensor monitors the reaction temperature in real time and feeds the temperature back to the TCU temperature control system. The TCU temperature control system adjusts the flow rate of the heat exchange medium according to the real-time feedback signal, thereby regulating the cooling temperature.

[0055] Specifically, the second reaction unit provides a site for the etherification and cyclization reactions of the phenolic resin and epichlorohydrin in the first reaction unit under alkaline conditions. Within the second reaction unit, the phenolic resin and epichlorohydrin react under alkaline conditions to form a phenolic epoxy resin. The second reaction unit is connected to the outlet of the cooling unit via a pipeline.

[0056] In a preferred embodiment of this invention, the second reaction unit includes at least one overflow vessel connected in series. The structure of the overflow vessel is the same as that of the overflow vessel in the first reaction unit. Preferably, the second reaction unit includes two overflow vessels, with an epichlorohydrin inlet on the first overflow vessel and an alkaline solution inlet on the second overflow vessel. In the first overflow vessel, the phenolic resin from the first reaction unit undergoes an etherification reaction with epichlorohydrin to obtain an etherified reaction solution. This etherified reaction solution enters the second overflow vessel and undergoes a cyclization reaction under alkaline conditions to generate a cyclized reaction solution containing phenolic epoxy resin. The two-stage overflow vessels connected in series allow for better control of the reaction conditions and reduce impurity generation.

[0057] In addition, to achieve automatic control of the reaction temperature in the second reaction unit, a temperature sensor for monitoring the material temperature is also installed on the second reaction unit. Specifically, an instrument interface connected to the inside of the overflow vessel used in the second reaction unit can be installed. The temperature sensor is connected through the instrument interface, and the temperature sensor and the metering pump installed at the inlet of the heat exchange medium are connected to the TCU temperature control system through wires. The temperature range of the second reaction unit is set through the TCU temperature system. During the production process, the temperature sensor monitors the reaction temperature in real time and feeds the temperature back to the TCU temperature control system. The TCU temperature control system adjusts the flow rate of the heat exchange medium according to the real-time feedback signal, thereby regulating the reaction temperature and realizing automatic and precise temperature control of the second reaction unit, effectively preventing possible temperature runaway during the reaction process.

[0058] Specifically, the purification unit is used to purify and remove impurities from the cyclization reaction solution containing phenolic epoxy resin generated in the second reaction unit to obtain phenolic epoxy resin with higher purity. The purification unit is connected to the outlet of the second reaction unit via a pipeline.

[0059] In a preferred embodiment of this invention, the refining unit specifically includes a desalting kettle, an oil-water separator, and a distillation column connected sequentially by pipelines. The inlet of the desalting kettle is connected to the outlet of the second reaction unit, the outlet of the desalting kettle is connected to the inlet of the oil-water separator, the oil phase outlet of the oil-water separator is connected to the inlet of the distillation column, and the outlet of the heavy component at the bottom of the distillation column is connected to the inlet of a temporary storage tank via a pipeline. That is, the cyclization reaction liquid containing phenolic epoxy resin generated in the second reaction unit enters the desalting kettle for water washing. The washed reaction liquid enters the oil-water separator to separate the aqueous and oil phases. The separated oil phase further enters the distillation column for distillation to remove water, yielding the heavy phenolic epoxy resin at the bottom of the column, which is then collected and temporarily stored in the temporary storage tank.

[0060] Specifically, the post-processing unit is used to uniformly disperse phenolic epoxy resin with additives, pigments, and fillers, and then obtain a phenolic epoxy anti-corrosion coating through grinding, color adjustment, and filtration. The post-processing unit is connected to the outlet of the temporary storage tank via a pipeline.

[0061] In a preferred embodiment of this utility model, the post-processing unit includes a dispersion cylinder, a grinder, a color mixing cylinder, and a filter that are connected in sequence via pipelines.

[0062] The dispersion cylinder is equipped with a feed inlet, a sealed solid feeder, an exhaust vent, and an observation port on its cylinder cover. The feed inlet is connected to the outlet of a temporary storage tank via a metering pump and pipeline for feeding phenolic epoxy resin. At least one sealed solid feeder is provided for adding solid additives and solid pigments / fillers. This sealed feeder prevents the material from reacting with oxygen or other substances in the air and also prevents dust generated during the feeding process from leaking into the working environment, reducing wear on the equipment and harm to personnel. The exhaust vent collects and discharges gas from the dispersion cylinder, preventing increased internal pressure caused by gas during dispersion, which could lead to uneven stress on the cylinder cover and material leakage. The observation port is used to monitor the material dispersion state and take samples for testing.

[0063] Specifically, the aforementioned grinding mill is a closed horizontal grinding mill, with its feed inlet connected to the discharge outlet of the dispersion cylinder. The dispersion liquid and grinding media in the dispersion cylinder are agitated and dispersed by the stirrer inside the closed horizontal grinding mill to obtain the grinding liquid. In addition, the grinding mill is equipped with a water-cooled circulating jacket for controlling the grinding temperature. Cooling water is circulated in the water-cooled circulating jacket, which can reduce the temperature during the grinding process, ensure the stability and consistency of the grinding effect, and make the pigments and additives evenly distributed in the resin through grinding, thereby improving the overall performance of the coating.

[0064] The aforementioned color mixing cylinder is equipped with a feed inlet, a pigment inlet, and a solvent inlet. The feed inlet of the color mixing cylinder is connected to the discharge outlet of the grinding mill. The pigment inlet and solvent inlet of the color mixing cylinder are used to add the corresponding pigments and solvents to adjust the color and viscosity of the coating.

[0065] The inlet of the aforementioned filter is connected to the outlet of the color mixing tank in the post-processing unit. Specifically, the filter is a Y-type filter. This filter is used to filter impurities such as dust, fibers, metal particles, and adhesive lumps from the paint.

[0066] Specifically, the filling unit is used to encapsulate the phenolic epoxy anti-corrosion coating. The filling unit is connected to the filter outlet via a pipeline.

[0067] In a preferred embodiment of this utility model, the filling unit includes a filling machine and a conveyor line disposed below the filling machine. A filter screen is disposed inside the filling machine and above the discharge port of the filling machine. The filter screen has a pore size of 100 to 500 mesh to filter and remove impurities from the coating, thereby improving the product quality of the coating.

[0068] In addition, waste gas is inevitably generated during the production of phenolic epoxy anti-corrosion coatings. In order to avoid the emission of harmful substances in the waste gas into the atmosphere and reduce the negative impact on the environment, waste gas collection and treatment units are used to collect and treat the waste gas.

[0069] Specifically, the waste gas collection unit includes a first gas collection hood, a second gas collection hood, and a third gas collection hood for collecting waste gases generated by the batching and conveying unit, the post-processing unit, and the bottling unit, respectively. When phenolic compounds are heated and melted in the heating tank, the heated phenolic compounds release flammable vapors. These vapors can form explosive mixtures with air, and high concentrations of phenol vapors can cause severe tissue burns upon contact with the human body. Furthermore, absorption through the skin or inhalation can reach lethal doses. Therefore, the first gas collection hood is needed to collect the waste gases generated by the batching and conveying unit. When the heating tank is used to heat the phenolic compound storage tank, a heating tank cover is needed to seal the heating tank, and an outlet is provided on the tank body. The first gas collection hood is then set to heat the tank. At the outlet of the tank, the escaping phenolic compounds are collected by the first gas collecting hood. When the phenolic compound storage tank is heated by a heating tank, an outlet needs to be set on the phenolic compound storage tank with heating pipes surrounding its outer wall, and the first gas collecting hood is set at the outlet of the phenolic compound storage tank to collect the escaping phenolic compounds. The second gas collecting hood is set at the air inlet of the dispersion cylinder to collect the gas or dust discharged from the dispersion cylinder. The third gas collecting hood is set at the discharge port of the filling machine to collect volatile gases or dust during the filling process.

[0070] Based on the above-mentioned waste gas collection unit, the waste gas treatment unit further processes the collected gas or dust, and connects the outlets of the first, second and third gas collection hoods to the inlet of the main waste gas pipe through pipelines, and connects the outlet of the main waste gas pipe to the waste gas treatment unit.

[0071] Specifically, the aforementioned waste gas treatment unit includes a pulse-jet bag filter, a three-stage dry filter, a zeolite rotary adsorption concentration device, and a combustion furnace, all connected sequentially via pipelines. The waste gas treatment process is as follows: waste gas collected by the first, second, and third collection hoods enters the waste gas treatment unit. Within the unit, driven by the fan of the pulse-jet bag filter, a negative pressure environment is created inside the filter. Waste gas and dust enter the filter under the pressure difference. The gas passes through the filter bags inside the filter, while dust remains on the filter bag surface. The treated waste gas is then discharged to the three-stage dry filter, where the waste gas and dust are further processed by the material fibers, which alter the particle size distribution. The inertial force of particulate matter separates it from the exhaust gas, improving filtration efficiency. The exhaust gas, filtered by a three-stage dry filter, then enters a zeolite rotor adsorption concentration unit. Passing through a pre-filter in this unit, the exhaust gas enters the adsorption zone of the zeolite molecular sieve rotor. In this zone, VOCs in the exhaust gas are adsorbed by the zeolite molecular sieve. The unadsorbed exhaust gas, driven by an adsorption fan, is directly discharged to a combustion furnace. The furnace performs high-temperature combustion of the organic matter in the exhaust gas, converting it into harmless carbon dioxide and water vapor, achieving complete purification. This exhaust gas treatment unit boasts a treatment efficiency of up to 99%, and its exhaust emissions meet the emission limits and characteristic pollutant emission limits for the "Paint, Ink, Pigment and Similar Product Manufacturing Industry II Time Period" in the "Volatile Organic Compounds Emission Standard Part 6: Organic Chemical Industry".

[0072] In addition, to make full use of the waste heat from the combustion of exhaust gas, the high-temperature flue gas emitted from the combustion furnace can be introduced into the steam coil of the heating tank, and the heat of the high-temperature flue gas can be used to heat the material in the phenol compound storage tank to melt it.

[0073] Example 1

[0074] Reference Figure 1 This embodiment provides a continuous production apparatus for phenolic epoxy resin anticorrosive coatings, specifically including a batching and conveying unit 1, a first reaction unit 2, a cooling unit 3, a second reaction unit 4, a refining unit 5, a post-processing unit 7, and a filling unit 8 connected in sequence by pipelines. The continuous production of phenolic epoxy anticorrosive coatings is realized through this production apparatus.

[0075] The aforementioned batching and conveying unit 1 specifically includes a phenolic compound storage tank 101, an aldehyde compound storage tank 102, a batching tank 103 for preparing reaction materials, and a heating tank for heating the phenolic compound storage tank 101. The phenolic compound storage tank 101 is located inside the heating tank. The outlets of the phenolic compound storage tank 101 and the aldehyde compound storage tank 102 are connected to the inlet of the batching tank 103 via pipelines. Metering pumps are installed on the pipelines between the outlets of the phenolic compound storage tank 101 and the aldehyde compound storage tank 102 and the batching tank 103 to control the ratio of phenolic compounds and aldehyde compounds entering the batching tank 103. A metering pump is installed at the outlet of the batching tank 103 to control the flow rate of the mixed reaction materials of phenolic compounds and aldehyde compounds entering the first reaction unit 2. The aforementioned mixing tank 103 can specifically be a stirring vessel with a stirring function, thereby mixing phenolic compounds and aldehyde compounds evenly; the aforementioned heating tank specifically uses a steam coil for heating, with the steam coil arranged around the inner surface of the heating tank.

[0076] The aforementioned first reaction unit 2 specifically includes two-stage series dynamic tubular reactors 201. The dynamic tubular reactor 201 includes a reaction chamber, a stirring shaft disposed inside the reaction chamber and rotatably connected to the reaction chamber, a jacket disposed outside the reaction chamber, and a drive motor disposed at the outer end of the reaction chamber for driving the stirring shaft to rotate. The dynamic tubular reactor 201 is also provided with an inlet, an outlet, and an alkali inlet communicating with the reaction chamber. The inlet of the aforementioned first-stage dynamic tubular reactor is connected to the outlet of the mixing tank 103, the outlet of the first-stage dynamic tubular reactor is connected to the inlet of the second-stage dynamic tubular reactor, and the outlet of the second-stage dynamic tubular reactor is connected to the inlet of the cooling unit 3. In addition, the jacket of the dynamic tubular reactor 201 is provided with a heat exchange medium inlet and a heat exchange medium outlet. The above-mentioned stirring shaft is a hollow stirring shaft with closed ends. The stirring shaft is also provided with a heat exchange medium inlet and a heat exchange medium outlet, which are used to introduce heat exchange medium to exchange heat with the reactants in the reaction chamber so that the reaction temperature reaches the requirements.

[0077] The aforementioned cooling unit 3 specifically includes two-stage heat exchangers 301 connected in series. These heat exchangers can be shell-and-tube heat exchangers. The inlet of the tube side of the first-stage shell-and-tube heat exchanger is connected to the outlet of the first reaction unit 2. The outlet of the tube side of the first-stage shell-and-tube heat exchanger is connected to the inlet of the tube side of the second-stage shell-and-tube heat exchanger. The outlet of the tube side of the second-stage shell-and-tube heat exchanger is connected to the inlet of the second reaction unit 3. Furthermore, the shell side of the aforementioned shell-and-tube heat exchanger 301 is provided with a heat exchange medium inlet and a heat exchange medium outlet for introducing the heat exchange medium to exchange heat with the reactants and cool the reactants.

[0078] The aforementioned second reaction unit 4 includes two overflow vessels 401 connected in series. Each overflow vessel 401 includes a vessel body, a stirring shaft inside the vessel body, a jacket outside the vessel body, and a drive motor at the top of the vessel body for driving the stirring shaft. The overflow vessel 401 also has an inlet and an overflow port communicating with the interior of the vessel body. Preferably, the inlet and alkali inlet of the overflow vessel 401 are located at the lower part of the vessel body. Alternatively, when the inlet or alkali inlet is located at the upper part of the vessel body, the alkali inlet needs to be accessed through the inlet. Alternatively, the alkali inlet can be inserted into the feed pipe so that the outlet end of the feed pipe is located at the bottom of the vessel body, and the overflow port is preferably located at the top of the vessel body. Furthermore, the first-stage overflow vessel 401 is equipped with an epichlorohydrin inlet, and the second-stage overflow vessel 401 is equipped with an alkali inlet. The feed inlet of the first-stage overflow vessel 401 is connected to the outlet of the cooling unit 3, and the overflow port of the first-stage overflow vessel 401 is connected to the feed inlet of the second-stage overflow vessel 401. The overflow port of the second-stage overflow vessel 401 is connected to the feed inlet of the refining unit 5. Additionally, the jacket of the overflow vessel 401 is also equipped with a heat exchange medium inlet and a heat exchange medium outlet for introducing the heat exchange medium to exchange heat with the reactants, ensuring the reaction temperature reaches the required level.

[0079] The aforementioned refining unit 5 specifically includes a desalting kettle 501, an oil-water separator 502, and a distillation column 503 connected in sequence by pipelines. The inlet of the desalting kettle 501 is connected to the outlet of the second reaction unit 4, the outlet of the desalting kettle 501 is connected to the inlet of the oil-water separator 502, the oil phase outlet of the oil-water separator 502 is connected to the inlet of the distillation column 503, and the heavy component outlet at the bottom of the distillation column 503 is connected to the temporary storage tank 6 by pipelines.

[0080] The post-processing unit 7 includes a dispersion cylinder 701, a grinder 702, a color mixing cylinder 703, and a filter 704, which are connected in sequence by pipelines.

[0081] Specifically, the cylinder cover of the aforementioned dispersion cylinder 701 is equipped with a feed inlet, a sealed solid feeder 705, an air vent, and an observation port, with the observation port having an openable transparent glass cover. The feed inlet of the dispersion cylinder 701 is connected to the discharge port of the temporary storage tank 6 via a metering pump and pipeline for feeding phenolic epoxy resin. Two sealed solid feeders 705 are provided, one for feeding solid additives and the other for feeding solid pigments and fillers. The sealed solid feeders 705 can prevent the material from reacting with oxygen and other substances in the air, and can also prevent dust generated during the feeding process from leaking into the working environment. The air vent is used to collect and discharge the gas inside the dispersion cylinder to prevent the gas generated inside the dispersion cylinder during the dispersion process from increasing the internal pressure of the dispersion cylinder, causing uneven stress on the cylinder cover, and leading to material leakage. The observation port is used to monitor the dispersion state of the material and to take samples for testing.

[0082] The aforementioned grinding mill 702 is specifically a closed horizontal grinding mill, and the feed inlet of the grinding mill 702 is connected to the discharge outlet of the dispersion cylinder 701. The dispersion liquid and grinding media in the dispersion cylinder are agitated and dispersed by the stirrer inside the grinding mill to obtain grinding liquid. In addition, the grinding mill 702 is equipped with a water-cooled circulating jacket for controlling the grinding temperature. Cooling water is circulated in the water-cooled circulating jacket, which can reduce the temperature during the grinding process, ensure the stability and consistency of the grinding effect, and make the pigments and additives evenly distributed in the resin through grinding, thereby improving the overall performance of the coating.

[0083] The aforementioned color mixing cylinder 703 is equipped with a feed inlet, a pigment inlet, and a solvent inlet. The feed inlet of the color mixing cylinder 703 is connected to the discharge outlet of the grinding mill 702. The pigment inlet and solvent inlet of the color mixing cylinder 703 are used to add the corresponding pigments and solvents to adjust the color and viscosity of the coating.

[0084] The inlet of the filter 704 is connected to the outlet of the color mixing tank 703. Specifically, the filter 704 is a Y-type filter. The filter 704 is used to filter impurities such as dust, fibers, metal particles, and adhesive lumps from the paint.

[0085] The filling unit 8 specifically includes a filling machine 801 and a conveyor line 802 located below the filling machine 801. A filter screen is installed inside the filling machine 801 and above the discharge port of the filling machine 801. The filter screen has a pore size of 100 to 500 mesh to filter and remove impurities from the coating, thereby improving the product quality of the coating.

[0086] In addition, to ensure continuous production of the above-mentioned production equipment, pumping equipment, such as ordinary transfer pumps or metering pumps with metering functions, is installed on the connecting pipelines between units or between the reaction equipment of each unit, according to the conveying requirements between each unit or between the reaction equipment of each unit.

[0087] The production apparatus described in this embodiment enables continuous production of phenolic epoxy anticorrosive coatings. The continuous production process is as follows:

[0088] A storage tank containing phenolic compounds is placed inside a heating tank. The phenolic compounds are indirectly heated and melted via steam coils within the heating tank. The melted phenolic compounds are then pumped to a mixing tank via a metering pump. Aldehyde compounds are also pumped to the mixing tank via a metering pump. In the mixing tank, the phenolic and aldehyde compounds are mixed uniformly according to a set ratio. The mixed reactants in the mixing tank are then pumped into a first reaction unit consisting of two-stage dynamic tubular reactors connected in series. Simultaneously, alkali solution is added at the alkali inlet of the two-stage dynamic tubular reactors. Under the catalytic action of the alkali solution, the phenolic and aldehyde compounds undergo a condensation reaction to obtain a condensation reaction solution containing phenolic resin. The condensation reaction solution then enters a cooling unit consisting of two-stage tubular heat exchangers. After rapid cooling, it enters a second reaction unit consisting of two-stage overflow vessels. In the second reaction unit, the first... In the first-stage overflow reactor, the condensation reaction solution containing phenolic resin undergoes an etherification reaction with epichlorohydrin to obtain an etherified reaction solution. The etherified reaction solution enters the second-stage overflow reactor and undergoes a cyclization reaction under the action of alkaline solution to generate a cyclized reaction solution containing phenolic epoxy resin. Then, the cyclized reaction solution containing phenolic epoxy resin enters the refining unit, where it is refined and impurities are removed to obtain phenolic epoxy resin, which is then stored in a temporary storage tank. The phenolic epoxy resin in the temporary storage tank is then directly pumped into the post-processing unit via a metering pump. In the post-processing unit, the phenolic epoxy resin first enters the dispersion tank and is dispersed evenly with additives, pigments, and fillers to obtain a dispersion. The dispersion is then ground to a certain fineness in a grinder and enters the color mixing tank to adjust the color and viscosity. After being filtered through a Y-type filter to remove impurities, it enters the filling unit and is filled by a filling machine to obtain a phenolic epoxy anti-corrosion coating.

[0089] Example 2

[0090] Reference Figure 2 This embodiment provides a production apparatus for phenolic epoxy anticorrosive coating. The difference between this apparatus and Embodiment 1 is that this embodiment also includes a TCU temperature control system, a temperature sensor electrically connected to the TCU temperature control system for monitoring the material temperature, and a metering pump for adjusting the flow rate of the heat exchange medium, so as to realize automatic temperature control of the first reaction unit 2, the cooling unit 3, and the second reaction unit 4.

[0091] Specifically, the first reaction unit 2, cooling unit 3, and second reaction unit 4 are all equipped with temperature sensors for monitoring the material temperature. Specifically, the dynamic tubular reactor 201 used in the first reaction unit 2 has an instrument interface communicating with the interior of the reaction chamber, through which the temperature sensor for monitoring the material temperature of the first reaction unit 2 is connected; the shell-and-tube heat exchanger 301 used in the cooling unit 3 has an instrument interface communicating with the tube side, through which the temperature sensor for monitoring the material temperature of the cooling unit 3 is connected; and the overflow vessel used in the second reaction unit 4 has an instrument interface communicating with the interior of the vessel, through which the temperature sensor for monitoring the material temperature of the second reaction unit 4 is connected.

[0092] In addition, the heat exchange medium inlet on the dynamic tubular reactor 201 used in the first reaction unit 2, the heat exchange medium inlet on the stirring shaft of the dynamic tubular reactor 201, the heat exchange medium inlet on the shell side of the tubular heat exchanger 301 of the cooling unit 3, and the heat exchange medium inlet on the overflow vessel 401 of the second reaction unit 4 are all equipped with metering pumps for controlling the flow rate of the heat exchange medium.

[0093] In this embodiment, the temperature sensors of the first reaction unit 2, cooling unit 3, and second reaction unit 4, as well as the metering pump installed at the inlet of the heat exchange medium, are connected to the TCU temperature control system via wires. During the production process, the temperature sensors monitor the material temperature in real time and feed the temperature back to the TCU temperature control system. The TCU temperature control system adjusts the flow rate of the heat exchange medium according to the real-time feedback signal, thereby regulating the material temperature and realizing automatic and precise temperature control of the first reaction unit 2, cooling unit 3, and second reaction unit 4, effectively preventing temperature runaway that may occur during the reaction process.

[0094] In this embodiment, during the production process, the temperature ranges for the first reaction unit 2, cooling unit 3, and second reaction unit 4 are pre-set in the TCU temperature control system. Temperature sensors monitor the material temperature in real time and feed it back to the TCU temperature control system. If the material temperature fed back by a certain temperature sensor is not within the set range, the TCU temperature control system adjusts the flow rate of the corresponding heat exchange medium according to the real-time feedback signal, thereby regulating the material temperature within the set range. For example, in this embodiment, the TCU temperature control system automatically controls the temperature of the first-stage dynamic tubular reactor of the first reaction unit 1 to 60-80°C. The initial reaction temperature is relatively low, and aldehydes and phenols undergo an addition reaction to obtain an addition reaction liquid. The temperature of the second-stage dynamic tubular reactor is controlled to be 90-120°C. The reaction temperature in this stage is relatively high, causing the addition reaction liquid to undergo a condensation reaction to form a condensation reaction liquid containing phenolic resin.

[0095] Example 3

[0096] Reference Figure 3 This embodiment provides a production apparatus for phenolic epoxy anticorrosive coating. The difference between this embodiment and Embodiment 2 is that this embodiment also includes a waste gas collection unit and a waste gas treatment unit 9. The waste gas is collected and treated by the waste gas treatment unit 9.

[0097] The aforementioned waste gas collection unit includes a first gas collection hood, a second gas collection hood, and a third gas collection hood for collecting waste gases generated by the batching and conveying unit, the post-processing unit, and the filling unit, respectively. When phenolic compounds are heated and melted in the heating tank, the heated phenolic compounds release flammable vapors. These vapors can form an explosive mixture with air, and high concentrations of phenol vapors can cause severe tissue burns upon contact with the human body. Furthermore, absorption through the skin or inhalation can reach lethal doses. Therefore, the first gas collection hood is needed to collect the waste gases generated by the batching and conveying unit. When the heating tank is used to heat the phenolic compound storage tank, a heating tank cover is required to seal the heating tank, and an outlet is provided on the tank body. The first gas collection hood is positioned at the outlet of the heating tank to collect the escaping phenolic compounds. The second gas collection hood is located at the air inlet of the dispersion cylinder to collect gases or dust discharged from the dispersion cylinder. The third gas collection hood is located at the discharge port of the filling machine to collect volatile gases or dust generated during the filling process. The first, second, and third gas collection hoods are specifically cone-shaped. Without affecting the operation of each piece of equipment, the first, second, and third gas collection hoods should cover the gas outlet of the heating tank, the air inlet of the dispersion cylinder, and the material outlet of the filling machine, respectively.

[0098] The collected gas or dust is further treated by the exhaust gas treatment unit 9. The outlets of the first, second, and third gas collecting hoods are connected to the exhaust gas main pipe 10 via pipelines, and the outlet of the exhaust gas main pipe 10 is connected to the exhaust gas treatment unit 9. The exhaust gas treatment unit 9 specifically includes a pulse-jet bag filter 901, a three-stage dry filter 902, a zeolite rotary adsorption and concentration device 903, and a combustion furnace 904, which are connected in sequence via pipelines.

[0099] The process of treating exhaust gas using the exhaust gas treatment unit is as follows: Exhaust gas collected by the first, second, and third collection hoods enters the exhaust gas treatment unit through the main exhaust pipe. In the treatment unit, a negative pressure environment is first created inside the pulse-jet bag filter under the power of its fan. Exhaust gas and dust enter the bag filter under the pressure difference. The gas is filtered through the filter bags inside the bag filter, while the dust remains on the surface of the filter bags. The treated exhaust gas is then discharged to a three-stage dry filter. A three-stage dry filter removes fine particulate matter and harmful gases from the exhaust gas. The filtered exhaust gas then enters a zeolite rotor adsorption concentration unit. Passing through a pre-filter in this unit, the exhaust gas enters the adsorption zone of the zeolite molecular sieve rotor. In this zone, VOCs in the exhaust gas are adsorbed by the zeolite molecular sieve. The unadsorbed exhaust gas is directly discharged to the combustion furnace by a fan. The combustion furnace burns the organic matter in the exhaust gas at high temperature, converting it into harmless carbon dioxide and water vapor, achieving complete purification. This exhaust gas treatment unit has a treatment efficiency of up to 99%, and the exhaust emissions meet the emission limits and characteristic pollutant emission limits for the "Paint, Ink, Pigment and Similar Product Manufacturing Industry II Time Period" in the "Volatile Organic Compounds Emission Standard Part 6: Organic Chemical Industry".

[0100] It should be noted that parts not mentioned in this utility model can be achieved by adopting or referencing existing technologies. For example, the specific structures of equipment such as dynamic tubular reactors, overflow vessels, heat exchangers, desalination vessels, oil-water separators, distillation vessels, grinding mills, filters, filling machines, conveyor lines, pulse-jet bag filters, three-stage dry filters, zeolite rotor adsorption concentration devices, and combustion furnaces can be obtained through existing technologies, or the above equipment can be purchased directly from the market.

[0101] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A production apparatus for phenolic epoxy anticorrosive coatings, characterized in that, include: The batching and conveying unit (1) includes a batching tank (103) for dispensing reaction materials and a metering pump installed at the outlet of the batching tank (103); The first reaction unit (2) has its inlet connected to the outlet of the batching and conveying unit (1), and the first reaction unit (2) includes at least two temperature control zones. Cooling unit (3), the inlet of which is connected to the outlet of the first reaction unit (2); The second reaction unit (4) has its inlet connected to the outlet of the cooling unit (3); The refining unit (5) has its inlet connected to the outlet of the second reaction unit (4); The post-processing unit (7) has its inlet connected to the outlet of the refining unit (5); A filling unit (8) is connected to the discharge port of the post-processing unit (7); The waste gas treatment unit (9) is used to treat the waste gas generated by the production unit.

2. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The batching and conveying unit (1) further includes a phenolic compound storage tank (101), an aldehyde compound storage tank (102), and a heating tank or heating pipe for heating the phenolic compound storage tank (101). The outlets of the phenolic compound storage tank (101) and the aldehyde compound storage tank (102) are connected to the inlet of the batching tank (103) through pipelines. A metering pump is installed on the pipeline between the outlets of the phenolic compound storage tank (101) and the aldehyde compound storage tank (102) and the batching tank (103). The phenolic compound storage tank (101) is installed inside the heating tank or the heating pipe is arranged around the outer wall of the phenolic compound storage tank (101).

3. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The first reaction unit (2), the cooling unit (3), and the second reaction unit (4) are all equipped with temperature sensors for monitoring material temperature and heat exchange systems for heat exchange. The heat exchange system is equipped with a heat exchange medium inlet and a heat exchange medium outlet, and a metering pump is installed before the heat exchange medium inlet. The temperature sensor and the metering pump are connected to the TCU temperature control system through wires.

4. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The first reaction unit (2) includes at least two stages of dynamic tubular reactors (201) connected in series or at least two stages of overflow tanks connected in series, and each stage of dynamic tubular reactor (201) or overflow tank is provided with an alkali inlet. The cooling unit (3) includes at least one heat exchanger (301); The second reaction unit (4) includes at least one overflow vessel (401), and the overflow vessel (401) is provided with an epichlorohydrin inlet and an alkaline solution inlet.

5. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The refining unit (5) includes a desalting kettle (501), an oil-water separator (502), and a distillation column (503). The inlet of the desalting kettle (501) is connected to the outlet of the second reaction unit (4) through a pipeline. The outlet of the desalting kettle (501) is connected to the inlet of the oil-water separator (502). The oil phase outlet of the oil-water separator (502) is connected to the inlet of the distillation column (503). The heavy component outlet at the bottom of the distillation column (503) is connected to the inlet of the post-processing unit (7).

6. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 5, characterized in that, A temporary storage tank (6) is provided between the refining unit (5) and the post-processing unit (7). The discharge port of the heavy component at the bottom of the distillation column (503) is connected to the inlet of the temporary storage tank (6) through a pipeline. The discharge port of the temporary storage tank (6) is connected to the inlet of the post-processing unit (7) through a pipeline and a metering pump.

7. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The post-processing unit (7) includes a dispersion cylinder (701), a grinder (702), a color mixing cylinder (703), and a filter (704) that are connected in sequence through pipelines; The cylinder cover of the dispersion cylinder (701) is equipped with a sealed solid feeder (705), an air inlet and an observation port; The grinding machine (702) is externally equipped with a water-cooled circulating jacket for controlling the grinding temperature; The color mixing tank (703) is equipped with a pigment inlet and a solvent inlet for adjusting color and viscosity, respectively.

8. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 1, characterized in that, The filling unit (8) includes a filling machine (801) and a conveyor line (802) located below the filling machine (801). A filter screen is provided inside the filling machine (801) and above the discharge port of the filling machine (801). The filter screen has a pore size of 100 to 500 mesh.

9. A production apparatus for a phenolic epoxy anticorrosive coating according to any one of claims 2-8, characterized in that, It also includes a waste gas collection unit, which includes a first gas collection hood, a second gas collection hood, and a third gas collection hood for collecting waste gas generated by the batching and conveying unit (1), the post-processing unit (7), and the filling unit (8), respectively; the first gas collection hood is set at the outlet of the heating tank containing the phenolic compound storage tank (101) or at the outlet of the phenolic compound storage tank (101) whose outer wall is surrounded by heating pipes; the second gas collection hood is set at the air inlet of the dispersion cylinder (701); and the third gas collection hood is set at the outlet of the filling machine (801).

10. The production apparatus for a phenolic epoxy anticorrosive coating according to claim 9, characterized in that, The outlets of the first, second, and third gas collection hoods are connected to the inlet of the exhaust gas main pipe (10) via pipelines. The outlet of the exhaust gas main pipe (10) is connected to the exhaust gas treatment unit (9). The exhaust gas treatment unit (9) includes a pulse-type bag filter (901), a three-stage dry filter (902), a zeolite rotary adsorption concentration device (903), and a combustion furnace (904) that are connected in sequence via pipelines.

Images