Industrial trimethylolpropane continuous production system
By optimizing the continuous production system of trimethylolpropane and adopting technologies such as countercurrent multi-effect evaporation and high-efficiency extraction and washing, the problems of high equipment requirements and low yield in the production of trimethylolpropane have been solved, and large-scale industrial production with high yield and low energy consumption has been achieved.
Patent Information
- Application Number
- CN202520126496.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Existing trimethylolpropane production processes suffer from problems such as high equipment requirements, low yield, high cost, long process flow, and easy crystallization tank blockage, resulting in small-scale and poor-quality domestic production facilities, making it difficult to achieve large-scale industrial continuous production.
A continuous production system is adopted, including raw material preparation system, condensation kettle, methanol removal tower, multi-effect evaporation system, extraction tower, water washing tower, solvent removal tower, thin film evaporator and other units. It combines countercurrent multi-effect evaporation, 2-ethylhexanol extraction, ultra-pure water washing and high-efficiency structured packing to optimize the process flow, control reaction conditions and reduce side reactions.
It achieves high yield and high quality production of trimethylolpropane, with high product purity, low energy consumption, simple process flow, few side reactions, and is suitable for large-scale industrial production. The product yield is increased by 15-20%, and energy consumption is reduced by 18-25%.
Smart Images
Figure CN223717109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of chemical technology, especially relates to an industrial trimethylolpropane continuous production system. BACKGROUND
[0002] Trimethylolpropane (TMP) is an important chemical raw material and organic intermediate. It is mainly used for producing alkyd resin and polyurethane, and can also be used for producing high-grade paint, rosin ester, surfactant, fiber processing agent, printing ink, plasticizer and high-grade lubricating oil, and can also be used as chain extender of resin, textile aid and thermal stabilizer of polyvinyl chloride resin.
[0003] In industry, TMP is mainly prepared by condensation kettle reaction of n-butyl aldehyde and formaldehyde under the action of alkaline catalyst, including Coniazzaro method and hydrogenation method. The hydrogenation method has higher requirement for production technology level, needs hydrogenation device in production process, has high equipment pressure, and has high requirement for hydrogenation equipment and catalyst, so the method is less used in industry, only BASF company in Germany uses the hydrogenation method, and the sodium method or calcium method Coniazzaro process is mostly used at home and abroad. The calcium salt used in the calcium method Coniazzaro process is difficult to handle, the process flow is long, the cost is high, the calcium salt is easy to crystallize and plug the pipeline, and the industrial production is difficult to solve, so most production plants use the sodium method Coniazzaro process.
[0004] The advanced technology abroad has adopted continuous reactor to replace the batch reactor, and the yield can reach about 95% based on n-butyl aldehyde, and the yield of the batch reactor is slightly lower, and the yield of the best process is 92%.
[0005] China began to develop and research trimethylolpropane process in the 1960s. The small-scale trial production devices of the first few plants were stopped due to backward technology, small scale, poor product quality and other reasons. In addition, several domestic research institutes such as Beijing Chemical Research Institute also carried out small-scale or pilot-scale research, but the engineering problems could not be solved, and the research still remained in the experimental stage. The domestic production devices mostly use batch production, and the process is backward, the cost is high, the quality is poor, the production capacity is low, the yield is low, and the unit consumption is higher than that of foreign countries. In recent years, China has relied on its own scientific research strength to develop and improve the production process, and realized the continuous production of trimethylolpropane, but the scale is small and the production plants are few, and at present only Beijing Chemical Plant No. 3, Jihua Group Haitai Company, Shanghai Nanda Chemical Plant and Shenyang Paint Plant, etc. have the production capacity, and the total output is less than 5000 t / a.
[0006] Therefore, in view of the production status and market prospect of trimethylolpropane in China, it is necessary to improve the existing technology, develop a large-scale industrial continuous production process with simple process, less side reaction, small post-treatment workload, good product quality, high yield, low operation energy consumption and low production cost, so that the trimethylolpropane production device in China can be greatly developed, and the technical level and product quality of the device can enter the world's leading ranks. Practical new type content
[0007] Therefore, the utility model aims at providing an industrial trimethylolpropane continuous production system to solve at least one technical problem in the background art.
[0008] To achieve the above-mentioned purpose, the technical scheme of the utility model is as follows:
[0009] An industrial trimethylolpropane continuous production system, comprising a raw material preparation system, a condensation kettle, a methanol removal tower, a multi-effect evaporation system, an extraction tower, a water washing tower, a desolventizing tower, a thin film evaporator, a TMP light component removal tower, a light component recovery tower, a TMP refining tower, a granulator and a packaging machine connected in sequence; the methanol removal tower is connected with a methanol recovery tower, and the methanol recovery tower is connected with the raw material preparation system; the water washing tower is connected with a dilute solvent recovery tower, and the dilute solvent recovery tower is connected with the multi-effect evaporation system; the dilute solvent recovery tower is connected with the extraction tower; and the extraction tower is connected with a sodium formate evaporation system.
[0010] Further, the sodium formate evaporation system is connected with the methanol recovery tower; the sodium formate evaporation system, a crystallization tank, a centrifugal machine and a dryer are connected in sequence; the desolventizing tower is connected with the extraction tower; the TMP light component removal tower is connected with the light component recovery tower, and the light component recovery tower is connected with the extraction tower; the thin film evaporator and the TMP refining tower are respectively connected with a TMP recovery tower, and the TMP recovery tower is connected with a heavy component recovery tower.
[0011] Further, the first inlet of the raw material preparation system is connected with a fifth-sixth tube line through which n-butyl aldehyde is taken in, the second inlet of the raw material preparation system is connected with a fifty-seventh tube line through which formaldehyde is taken in, the third inlet of the raw material preparation system is connected with a fifty-eighth tube line through which alkali liquor is taken in, the fourth inlet of the raw material preparation system is connected with a fifty-ninth tube line through which configuration water is taken in, and the fifth inlet of the raw material preparation system is connected with a sixtieth tube line through which formic acid is taken in.
[0012] Further, the outlet of the raw material preparation system is connected with the inlet of the condensation kettle through a twenty-first tube line, and the outlet of the condensation kettle is connected with the inlet of the methanol removal tower through a twenty-second tube line.
[0013] The first outlet of the methanol removal tower is connected with the first inlet of the methanol recovery tower through a twenty-third tube line, and the second outlet of the methanol removal tower is connected with the first inlet of the multi-effect evaporation system through a twenty-sixth tube line.
[0014] The first outlet of the methanol recovery tower is connected with the first inlet of the raw material preparation system through the twenty-fifth pipeline, and the second outlet of the methanol recovery tower is connected with the twenty-fourth pipeline for collecting recovered methanol;
[0015] The first outlet of the multi-effect evaporation system is connected with the first inlet of the extraction tower through the twenty-eighth pipeline, and the second outlet of the multi-effect evaporation system is connected with the sixth inlet of the raw material preparation system through the twenty-seventh pipeline.
[0016] Further, the second inlet of the extraction tower is connected with the fifty-fifth pipeline for supplementing solvent;
[0017] The first outlet of the extraction tower is connected with the first inlet of the water washing tower through the thirty-first pipeline;
[0018] The second inlet of the water washing tower is connected with the thirty-third pipeline for supplementing fresh water;
[0019] The second outlet of the extraction tower is connected with the inlet of the sodium formate evaporation system through the thirty-fourth pipeline;
[0020] The first outlet of the water washing tower is connected with the inlet of the dilute solvent recovery tower through the thirty-second pipeline, and the second outlet of the water washing tower is connected with the inlet of the desolventizing tower through the thirty-ninth pipeline.
[0021] Further, the first outlet of the dilute solvent recovery tower is connected with the second inlet of the multi-effect evaporation system through the twenty-ninth pipeline;
[0022] The second outlet of the dilute solvent recovery tower is connected with the third inlet of the extraction tower through the thirtieth pipeline;
[0023] The first outlet of the desolventizing tower is connected with the fourth inlet of the extraction tower through the fortieth pipeline, and the second outlet of the desolventizing tower is connected with the inlet of the thin film evaporator through the forty-second pipeline;
[0024] The first outlet of the thin film evaporator is connected with the inlet of the TMP light component removal tower through the forty-third pipeline, and the second outlet of the thin film evaporator is connected with the first inlet of the TMP recovery tower through the forty-sixth pipeline.
[0025] Further, the first outlet of the TMP light component removal tower is connected with the first inlet of the TMP refining tower through the forty-seventh pipeline, and the second outlet of the TMP light component removal tower is connected with the inlet of the light component recovery tower through the forty-fourth pipeline;
[0026] The first outlet of the light component recovery tower is connected with the fifth inlet of the extraction tower through the forty-first pipeline, and the second outlet of the light component recovery tower is connected with the forty-fifth pipeline for collecting light component products;
[0027] The first outlet of the TMP refining tower is connected with the second inlet of the TMP recovery tower through the forty-ninth pipeline; the first outlet of the TMP recovery tower is connected with the second inlet of the TMP refining tower through the fiftieth pipeline;
[0028] The second outlet of the TMP refining tower is connected with the inlet of the granulator through the forty-eighth pipeline, and the outlet of the granulator is connected with the fifty-first pipeline for collecting TMP products;
[0029] The second outlet of the TMP recovery tower is connected with the inlet of the heavy component recovery tower through the fifty-second pipeline, and the outlet of the heavy component recovery tower is connected with the fifty-third pipeline for collecting heavy component products.
[0030] Further, the first outlet of the sodium formate evaporation system is connected with the inlet of the crystallization tank through the thirty-sixth pipeline, and the second outlet of the sodium formate evaporation system is connected with the second inlet of the methanol recovery tower through the thirty-fifth pipeline;
[0031] The outlet of the crystallization tank is connected with the inlet of the centrifugal machine through the thirty-seventh pipeline, the outlet of the centrifugal machine is connected with the inlet of the dryer through the thirty-eighth pipeline, and the outlet of the dryer is connected with the fifty-fourth pipeline for collecting sodium formate products.
[0032] Further, the system further comprises a vacuum system, which is connected with the multi-effect evaporation system, the sodium formate evaporation system and the methanol recovery tower through pipelines respectively; the inlet of the vacuum system is connected with the sixty-first pipeline, and the outlet of the vacuum system is connected with the sixty-second pipeline for discharging vacuum tail gas.
[0033] Further, the system further comprises a tail gas washing tower, which is connected with the multi-effect evaporation system, the sodium formate evaporation system, the methanol recovery tower and the condensation kettle through pipelines respectively;
[0034] The inlet of the tail gas washing tower is connected with the sixty-third pipeline, and the outlet of the tail gas washing tower is connected with the sixty-fourth pipeline for discharging vacuum tail gas.
[0035] Compared with the prior art, the industrial continuous production system of trimethylolpropane has the following advantages:
[0036] 1. The method for the industrial continuous production of trimethylolpropane adopts the optimal raw material ratio, controls the appropriate reaction temperature and residence time, and obtains the maximum n-butyl aldehyde reaction yield.
[0037] 2. The method for the industrial continuous production of trimethylolpropane adopts the countercurrent multi-effect evaporation system technology, can reduce the water content in the concentrated liquid to the minimum, reduces the steam consumption of the concentration unit and reduces the load of the subsequent unit, and reduces the energy consumption.
[0038] 3, The method for continuous production of industrial trimethylolpropane of the application uses 2-ethylhexanol as the extraction column agent to separate formate and TMP and the like organic substances, thereby reducing the occurrence of side reactions in the extraction column process.
[0039] 4, The method for continuous production of industrial trimethylolpropane of the application uses ultra-pure water to wash the crude TMP solution, thereby reducing the Fe content in the crude TMP solution and reducing the occurrence of side reactions in the rectification process. 2+
[0040] 5, The method for continuous production of industrial trimethylolpropane of the application uses high-efficiency regular packing to improve the separation effect of the column.
[0041] 6, The method for continuous production of industrial trimethylolpropane of the application optimizes the sodium formate production process, adds a dryer system, has a short process flow, low energy consumption, and high-quality produced sodium formate.
[0042] 7, The method for continuous production of industrial trimethylolpropane of the application completes the granulation in a dryer and a closed system, which can effectively prevent the product from absorbing moisture.
[0043] 8, The method for continuous production of industrial trimethylolpropane of the application has a simple process flow, few side reactions, good product quality, high yield, little wastewater, low operating energy consumption, and can realize large-scale industrial continuous production of trimethylolpropane. BRIEF DESCRIPTION OF DRAWINGS
[0044] The accompanying drawings, which form a part of this description, are included to provide a further understanding of the application. The embodiments of the application and its
[0045] Figure 1 FIG. 1 is a schematic diagram of an industrial trimethylolpropane continuous production system according to an embodiment of the application.
[0046] BRIEF DESCRIPTION OF DRAWINGS
[0047] Raw material preparation system; 2, condensation kettle; 3, demethanol column; 4, methanol recovery column; 5, multi-effect evaporation system; 6, extraction column; 7, water washing column; 8, dilute solvent recovery column; 9, desolventizing column; 10, thin film evaporator; 11, TMP light component removal column; 12, light component recovery column; 13, TMP refining column; 14, granulator; 15, TMP recovery column; 16, heavy component recovery column; 17, sodium formate evaporation system; 18, crystallization tank; 19, centrifuge; 20, dryer; 80, vacuum system; 81, tail gas washing column; 21, twenty-first pipeline; 22, twenty-second pipeline; 23, twenty-third pipeline; 24, twenty-fourth pipeline; 25, twenty-fifth pipeline; 26, twenty-sixth pipeline; 27, twenty-seventh pipeline; 28, twenty-eighth pipeline; 29, twenty-ninth pipeline; 30, thirtieth pipeline; 31, thirty-first pipeline; 32, thirty-second pipeline; 33, thirty-third pipeline; 34, thirty-fourth pipeline; 35, thirty-fifth pipeline; 36, thirty-sixth pipeline; 37, thirty-seventh pipeline; 38, thirty-eighth pipeline; 39, thirty-ninth pipeline; 40, fortieth pipeline; 41, forty-first pipeline; 42, forty-second pipeline; 43, forty-third pipeline; 44, forty-fourth pipeline; 45, forty-fifth pipeline; 46, forty-sixth pipeline; 47, forty-seventh pipeline; 48, forty-eighth pipeline; 49, forty-ninth pipeline; 50, fiftieth pipeline; 51, fifty-first pipeline; 52, fifty-second pipeline; 53, fifty-third pipeline; 54, fifty-fourth pipeline; 55, fifty-fifth pipeline; 56, fifty-sixth pipeline; 57, fifty-seventh pipeline; 58, fifty-eighth pipeline; 59, fifty-ninth pipeline; 60, sixtieth pipeline; 61, sixty-first pipeline; 62, sixty-second pipeline; 63, sixty-third pipeline; 64, sixty-fourth pipeline; 65, sixty-fifth pipeline. DETAILED DESCRIPTION
[0048] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.
[0049] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "a plurality of" is two or more, unless otherwise specified.
[0050] In the description of the utility model, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected, it can be mechanical connection, or electrical connection, it can be directly connected, or indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood through specific circumstances.
[0051] The utility model will be described in detail below with reference to the drawings and in combination with embodiments.
[0052] As shown in Figure 1 The embodiment provides a system for continuous production of industrial trimethylolpropane, which comprises sequentially connected raw material preparation system 1, condensation kettle 2, demethanolization tower 3, methanol recovery tower 4, multi-effect evaporation system 5, extraction tower 6, water washing tower 7, dilute solvent recovery tower 8, desolventizing tower 9, thin film evaporator 10, TMP light component recovery tower 11, light component recovery tower 12, TMP refining tower 13, granulator 14, TMP recovery tower 15, heavy component recovery tower 16, sodium formate evaporation system 17, crystallization tank 18, centrifugal machine 19, dryer 20, vacuum system 80 and tail gas washing tower 81.
[0053] The first inlet of the raw material preparation system 1 is connected with the fifty-sixth pipeline 56 for taking n-butyl aldehyde, the second inlet of the raw material preparation system 1 is connected with the fifty-seventh pipeline 57 for taking formaldehyde, the third inlet of the raw material preparation system 1 is connected with the fifty-eighth pipeline 58 for taking alkali liquor, the fourth inlet of the raw material preparation system 1 is connected with the fifty-ninth pipeline 59 for taking configuration water, and the fifth inlet of the raw material preparation system 1 is connected with the sixtieth pipeline 60 for taking formic acid.
[0054] The outlet of the raw material preparation system 1 is connected with the inlet of the condensation kettle 2 through the twenty-first pipeline 21, and the outlet of the condensation kettle 2 is connected with the inlet of the demethanolization tower 3 through the twenty-second pipeline 22.
[0055] The first outlet of the demethanolization tower 3 is connected with the first inlet of the methanol recovery tower 4 through the twenty-third pipeline 23, and the second outlet of the demethanolization tower 3 is connected with the first inlet of the multi-effect evaporation system 5 through the twenty-sixth pipeline 26.
[0056] The first outlet of the methanol recovery tower 4 is connected with the first inlet of the raw material preparation system 1 through the twenty-fifth pipeline 25, and the second outlet of the methanol recovery tower 4 is connected with the twenty-fourth pipeline 24 for recovering methanol.
[0057] The first outlet of the multi-effect evaporation system 5 is connected with the first inlet of the extraction tower 6 through the twenty-eighth pipeline 28, and the second outlet of the multi-effect evaporation system 5 is connected with the sixth inlet of the raw material preparation system 1 through the twenty-seventh pipeline 27.
[0058] The second inlet of the extraction tower 6 is connected with the fifty-fifth pipeline 55 for supplementing solvent, the first outlet of the extraction tower 6 is connected with the first inlet of the water washing tower 7 through the thirty-first pipeline 31, the second inlet of the water washing tower 7 is connected with the thirty-third pipeline 33 for supplementing fresh water, the second outlet of the extraction tower 6 is connected with the inlet of the sodium formate evaporation system 17 through the thirty-fourth pipeline 34, the first outlet of the water washing tower 7 is connected with the inlet of the dilute solvent recovery tower 8 through the thirty-second pipeline 32, and the second outlet of the water washing tower 7 is connected with the inlet of the desolventizing tower 9 through the thirty-ninth pipeline 39.
[0059] The first outlet of the dilute solvent recovery tower 8 is connected with the second inlet of the multi-effect evaporation system 5 through the twenty-ninth pipeline 29, and the second outlet of the dilute solvent recovery tower 8 is connected with the third inlet of the extraction tower 6 through the thirtieth pipeline 30.
[0060] The first outlet of the desolventizing tower 9 is connected with the fourth inlet of the extraction tower 6 through the fortieth pipeline 40, and the second outlet of the desolventizing tower 9 is connected with the inlet of the thin film evaporator 10 through the forty-second pipeline 42.
[0061] The first outlet of the thin film evaporator 10 is connected with the inlet of the TMP light component removal tower 11 through the forty-third pipeline 43, and the second outlet of the thin film evaporator 10 is connected with the first inlet of the TMP recovery tower 15 through the forty-sixth pipeline 46.
[0062] The first outlet of the TMP light component removal tower 11 is connected with the first inlet of the TMP refining tower 13 through the forty-seventh pipeline 47, and the second outlet of the TMP light component removal tower 11 is connected with the inlet of the light component recovery tower 12 through the forty-fourth pipeline 44.
[0063] The first outlet of the light component recovery tower 12 is connected with the fifth inlet of the extraction tower 6 through the forty-first pipeline 41, and the second outlet of the light component recovery tower 12 is connected with the forty-fifth pipeline 45 for light component product collection.
[0064] The first outlet of the TMP refining tower 13 is connected with the second inlet of the TMP recovery tower 15 through the forty-ninth pipeline 49, and the first outlet of the TMP recovery tower 15 is connected with the second inlet of the TMP refining tower 13 through the fiftieth pipeline 50.
[0065] The second outlet of the TMP refining tower 13 is connected with the inlet of the granulator 14 through the forty-eighth pipeline 48, and the outlet of the granulator 14 is connected with the fifty-first pipeline 51 for TMP product collection.
[0066] The second outlet of the TMP recovery tower 15 is connected with the inlet of the heavy component recovery tower 16 through the fifty-second pipeline 52, and the outlet of the heavy component recovery tower 16 is connected with the fifty-third pipeline 53 for heavy component product collection.
[0067] The first outlet of the sodium formate evaporation system 17 is connected with the inlet of the crystallization tank 18 through the thirty-sixth pipeline 36, and the second outlet of the sodium formate evaporation system 17 is connected with the second inlet of the methanol recovery tower 4 through the thirty-fifth pipeline 35.
[0068] The outlet of the crystallization tank 18 is connected with the inlet of the centrifuge 19 through the thirty-seventh pipeline 37, the outlet of the centrifuge 19 is connected with the inlet of the dryer 20 through the thirty-eighth pipeline 38, and the outlet of the dryer 20 is connected with the fifty-fourth pipeline 54 for sodium formate product collection.
[0069] The inlet of the vacuum system 80 is connected with the sixty-first pipeline 61 for extracting gas from evaporation, distillation and other operations under vacuum conditions, and the outlet of the vacuum system 80 is connected with the sixty-second pipeline 62 for vacuum tail gas discharge.
[0070] The inlet of the tail gas washing tower 81 is connected with the sixty-third pipeline 63 for collecting tail gas generated in the TMP production process, such as evaporation tail gas, distillation vacuum system tail gas, atmospheric tank vent gas, etc., and the outlet of the tail gas washing tower 81 is connected with the sixty-fourth pipeline 64 for discharging washed tail gas that meets the emission standard.
[0071] The dilute solvent recovery tower 8 is connected with a pipeline returning to the multi-effect evaporation system 5, which can recover the effective components carried by the water washing tower for secondary multi-effect evaporation system, thereby improving the product yield.
[0072] The multi-effect evaporation system 5 and the methanol recovery tower 4 are connected with the raw material preparation system 1, which can fully utilize the water recovered and purified as preparation water for raw material preparation, thereby saving water.
[0073] The dilute solvent recovery tower 8, the desolventizing tower 9 and the light component recovery tower 12 are connected with the extraction tower 6, so that the solvent recovered and purified can be fully utilized for the extraction tower of the target product, and the consumption of fresh solvent is reduced.
[0074] In the utility model, taking a 50,000 tons / year trimethylolpropane device as an example, the raw material n-butyl aldehyde purity is 99.5wt%, the formaldehyde purity is 37wt%, 42wt% sodium hydroxide solution and 85wt% formic acid solution are selected, the reaction temperature is controlled to be 30~40℃, the pressure is 0.2~0.3MPa, the pH is 5~7, the condensation liquid is obtained by countercurrent four-effect evaporation, 99.5wt% 2-ethylhexanol is used for extraction tower and extremely pure water is used for washing, the operating pressure of the extraction tower and the water washing tower is about 0.1MPa, the temperature is about 65℃, the solvent content in the crude TMP after the water washing tower is about 1.3%, the light component content is about 2.5wt%, the heavy component content is about 7.3wt%, the TMP content is about 88.9wt%, the crude TMP is refined by a thin film evaporator, light component removal and heavy component removal to obtain TMP product, the operating pressure of the thin film evaporator and the rectifying tower is controlled to be 0.001~0.005MPa. The trimethylolpropane product produced has purity≥99.0wt%, hydroxyl value≥1235mgKOH / g, acidity (calculated by HCOOH)≤0.002wt%, ash content≤0.005wt%, moisture content≤0.05wt%, colority≤10APHA (Pt-Co), and meets the HG / T 4122-2020 industrial superior product standard, compared with the existing process, the product yield is increased by 15~20%, and the comprehensive energy consumption is reduced by 18~25%.
[0075] The above only describes preferred embodiments of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A continuous production system for industrial trimethylolpropane, characterized by: The system comprises a raw material preparation system (1), a condensation kettle (2), a demethanolization tower (3), a multi-effect evaporation system (5), an extraction tower (6), a water washing tower (7), a desolventizing tower (9), a thin film evaporator (10), a TMP light component removal tower (11), a light component recovery tower (12), a TMP refining tower (13), a granulator (14), a packaging machine, the demethanolization tower (3) is connected with the methanol recovery tower (4), the methanol recovery tower (4) is connected with the raw material preparation system (1), the water washing tower (7) is connected with the dilute solvent recovery tower (8), the dilute solvent recovery tower (8) is connected with the multi-effect evaporation system (5), the dilute solvent recovery tower (8) is connected with the extraction tower (6), and the extraction tower (6) is connected with the sodium formate evaporation system (17).
2. The continuous production system of trimethylolpropane for industrial use according to claim 1, characterized by: The sodium formate evaporation system (17) is connected with the methanol recovery tower (4), the sodium formate evaporation system (17), the crystallization tank (18), the centrifugal machine (19) and the dryer (20) are sequentially connected, the desolventizing tower (9) is connected with the extraction tower (6), the TMP light component removal tower (11) is connected with the light component recovery tower (12), the light component recovery tower (12) is connected with the extraction tower (6), the thin film evaporator (10) and the TMP refining tower (13) are respectively connected with the TMP recovery tower (15), and the TMP recovery tower (15) is connected with the heavy component recovery tower (16).
3. The continuous production system of trimethylolpropane for industrial use according to claim 1, characterized by: The first inlet of the raw material preparation system (1) is connected with a fifty-sixth pipeline (56) for n-butyl aldehyde, the second inlet of the raw material preparation system (1) is connected with a fifty-seventh pipeline (57) for formaldehyde, the third inlet of the raw material preparation system (1) is connected with a fifty-eighth pipeline (58) for lye, the fourth inlet of the raw material preparation system (1) is connected with a fifty-ninth pipeline (59) for configuration water, and the fifth inlet of the raw material preparation system (1) is connected with a sixtieth pipeline (60) for formic acid.
4. The continuous production system of trimethylolpropane for industrial use according to claim 2, characterized by: The outlet of the raw material preparation system (1) is connected with the inlet of the condensation kettle (2) through a twenty-first pipeline (21), the outlet of the condensation kettle (2) is connected with the inlet of the demethanolization tower (3) through a twenty-second pipeline (22), the first outlet of the demethanolization tower (3) is connected with the first inlet of the methanol recovery tower (4) through a twenty-third pipeline (23), and the second outlet of the demethanolization tower (3) is connected with the first inlet of the multi-effect evaporation system (5) through a twenty-sixth pipeline (26); the first outlet of the methanol recovery tower (4) is connected with the first inlet of the raw material preparation system (1) through a twenty-fifth pipeline (25), and the second outlet of the methanol recovery tower (4) is connected with a twenty-fourth pipeline (24) for recovering methanol; the first outlet of the multi-effect evaporation system (5) is connected with the first inlet of the extraction tower (6) through a twenty-eighth pipeline (28), and the second outlet of the multi-effect evaporation system (5) is connected with the sixth inlet of the raw material preparation system (1) through a twenty-seventh pipeline (27).
5. The continuous production system of trimethylolpropane for industrial use according to claim 4, characterized by: The second inlet of the extraction tower (6) is connected with a fifty-fifth pipeline (55) for supplementing solvent; the first outlet of the extraction tower (6) is connected with the first inlet of the water washing tower (7) through a thirty-first pipeline (31); The second inlet of the water washing tower (7) is connected with a thirty-third pipeline (33) for fresh water supplement; The second outlet of the extraction tower (6) is connected with the inlet of the sodium formate evaporation system (17) through a thirty-fourth pipeline (34); The first outlet of the dilute solvent recovery tower (8) is connected with the second inlet of the multi-effect evaporation system (5) through a twenty-ninth pipeline (29); 6. The continuous production system of trimethylolpropane for industrial use according to claim 2, characterized by: The second outlet of the dilute solvent recovery tower (8) is connected with the third inlet of the extraction tower (6) through a thirtieth pipeline (30); The first outlet of the desolventizing tower (9) is connected with the fourth inlet of the extraction tower (6) through a fortieth pipeline (40), and the second outlet of the desolventizing tower (9) is connected with the inlet of the thin film evaporator (10) through a forty-second pipeline (42); The first outlet of the thin film evaporator (10) is connected with the inlet of the TMP light component removal tower (11) through a forty-third pipeline (43), and the second outlet of the thin film evaporator (10) is connected with the first inlet of the TMP recovery tower (15) through a forty-sixth pipeline (46). The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); 7. The continuous production system of trimethylolpropane for industrial use according to claim 2, characterized by: The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); 8. The continuous production system of trimethylolpropane for industrial use according to claim 2, characterized by: The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet of the TMP refining tower (13) through a forty-seventh pipeline (47), and the second outlet of the TMP light component removal tower (11) is connected with the inlet of the light component recovery tower (12) through a forty-fourth pipeline (44); The first outlet of the TMP light component removal tower (11) is connected with the first inlet 9. The continuous production system of trimethylolpropane for industrial use according to claim 1, characterized by: A vacuum system (80) is further included, which is connected with the multi-effect evaporation system (5), the sodium formate evaporation system (17) and the methanol recovery tower (4) through pipes respectively; a sixty-first pipeline (61) is connected with the inlet of the vacuum system (80), and a sixty-second pipeline (62) for discharging vacuum tail gas is connected with the outlet of the vacuum system (80).
10. The continuous production system of trimethylolpropane for industrial use according to claim 1, characterized by: A tail gas washing tower (81) is further included, which is connected with the multi-effect evaporation system (5), the sodium formate evaporation system (17), the methanol recovery tower (4) and the condensation kettle (2) through pipes respectively; A sixty-third pipeline (63) is connected with the inlet of the tail gas washing tower (81), and a sixty-fourth pipeline (64) for discharging vacuum tail gas is connected with the outlet of the tail gas washing tower (81).