Integrated evaporation device applied to carbonyl synthesis process
Through the coalescence separation of the integrated evaporator device and the design of a combined evaporator, the problems of catalyst entrainment loss and high energy consumption are solved, efficient catalyst recovery and production efficiency are achieved, and operational costs are reduced.
Patent Information
- Application Number
- CN202422400202.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the existing carbonyl synthesis process, the evaporation effect of the dual-effect falling film evaporator is not ideal, resulting in increased entrainment loss and energy consumption of precious metal catalysts, and the catalyst activity is affected by thermal shock, which reduces production efficiency and stability.
The integrated evaporation device is adopted, including a catalyst material mixer, a coalescing separator and a combined evaporator. The catalyst is separated and recovered through the coalescing separator, and then the combined evaporator is used to lower film heating and gas-liquid separation of oil phase products. Combined with an automatic spray cleaning device to prevent clogging, improving catalyst utilization and production efficiency.
Effectively reduce catalyst losses, reduce operating costs, improve catalyst activity and production efficiency, reduce energy consumption, ensure long-term continuous operation of equipment, and enhance product purification and economic benefits.
Smart Images
Figure CN223299570U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to chemical carbonyl synthesis process production equipment, in particular to an integrated evaporation device applied to the carbonyl synthesis process. Background Art
[0002] Oxo synthesis mainly involves the reaction of olefins with synthesis gas (carbon monoxide and hydrogen) to produce aldehydes with one more carbon atom than the raw olefins. This reaction cannot proceed in the absence of a catalyst. Oxo synthesis catalysts are generally precious metal catalysts. To avoid the loss of precious metal catalysts, the separation of catalysts and aldehyde products is another research focus.
[0003] At present, the double-effect falling film evaporator is the most widely used mainstream evaporator. The evaporation effect of this evaporator is not ideal, which will cause the entrainment loss of some catalysts. The existing carbonyl synthesis precious metal catalysts are expensive, resulting in serious waste. At the same time, the continuous use of a large amount of steam heat source in the double-effect evaporator also increases the overall energy consumption, greatly increasing the production and operation costs. In addition, the high temperature and long-term evaporation operation will also cause the catalyst to suffer from "thermal shock", resulting in chain inactivation, reducing catalytic activity, and affecting production efficiency and stability. Utility Model Content
[0004] In view of this, the main purpose of the present invention is to provide an integrated evaporation device applied to the carbonyl synthesis process. Through this technical solution, the activity of the catalyst is effectively improved, and the problem of equipment blockage in continuous production is solved. At the same time, the agglomeration separator and the combined evaporator are used to recycle the aqueous phase material containing the catalyst produced by the agglomeration separator and the liquid material containing the catalyst produced by the combined evaporator for reuse, thereby greatly improving the utilization rate of the catalyst, effectively reducing the catalyst loss, reducing the operating cost, and achieving increased production and increased revenue.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the present invention is implemented as follows: an integrated evaporation device applied to a carbonyl synthesis process, comprising a catalyst material mixer, a coalescing separator and a combined evaporator, wherein a catalyst material feed pipe is provided above the front of the coalescing separator, a water phase material discharge pipe is provided at the middle position below the middle of the coalescing separator, an oil phase material discharge pipe is provided at the lower rear of the coalescing separator, a liquid phase material feed pipe is provided in the middle of the combined evaporator, and a liquid phase material discharge port is provided at the bottom of the combined evaporator. The output end of the catalyst material mixer is connected to the catalyst material feed pipe of the coalescing separator through a connecting pipeline, the oil phase material discharge pipe of the coalescing separator is connected to the liquid phase material feed pipe of the combined evaporator through a connecting pipeline through a material conveying pump, the water phase material discharge pipe of the coalescing separator and the liquid phase material discharge port of the combined evaporator are connected in parallel through a connecting pipeline, and then connected to the input end of the catalyst material mixer through a playback pump.
[0006] As a further technical solution, the coalescing separator also includes a coalescing filter element, a separation filter element and an overflow baffle. The coalescing filter element is encapsulated in the coalescing separator shell at the rear position of the catalyst material feed pipe, and the separation filter element is encapsulated in the coalescing separator shell at the rear position of the water phase material discharge pipe. The overflow baffle is vertically upward, and the upper end of the overflow baffle is higher than or equal to the horizontal center position of the coalescing separator shell, and is arranged behind the separation filter element of the coalescing separator and in front of the liquid phase material discharge pipe of the coalescing separator.
[0007] As a further technical solution, the catalyst material feed pipe extends from the upper outer side of the coalescing separator shell into the coalescing separator shell, and the discharge port of the catalyst material feed pipe is arranged at the lower position inside the coalescing separator shell; the coalescing separator also includes a weight mechanism, and the water phase material discharge pipe is arranged below the weight mechanism, and the top of the weight mechanism is fixed to the corresponding bottom position of the coalescing separator shell.
[0008] As a further technical solution, the combined evaporator also includes a packing layer, a gas-liquid separation section, a heat exchange tube, a heating chamber, a hot water inlet, a hot water outlet, a central tube bundle, an evaporation chamber and a secondary gas phase product outlet. The packing layer is arranged in the upper part of the combined evaporator shell, the gas-liquid separation section is arranged below the packing layer of the combined evaporator, the evaporation chamber is arranged in the lower part of the combined evaporator shell, the central tube bundle is arranged in the middle position between the gas-liquid separation section and the evaporation chamber in the combined evaporator shell, the heating chamber seal is arranged around the central tube bundle, and several heat exchange tubes are vertically inserted in the heating chamber. The upper port of each heat exchange tube is respectively connected to the liquid material feed pipe of the combined evaporator, and the lower port of each heat exchange tube is respectively connected to the evaporation chamber located below. The hot water inlet and the hot water outlet are respectively arranged on the combined evaporator shell at the corresponding positions of the lower and upper parts of the heating chamber, and the secondary gas phase product outlet is arranged on the top of the combined evaporator shell.
[0009] As a further technical solution, the combined evaporator also includes a wire mesh demister, a baffle demister, a gas-liquid separation cleaning spray pipe and a gas-liquid separation cleaning liquid inlet. The wire mesh demister is arranged at the upper part of the gas-liquid separation section in the combined evaporator, the baffle demister is arranged below the wire mesh demister, and the gas-liquid separation cleaning spray pipe is horizontally arranged above the wire mesh demister. One end of the gas-liquid separation cleaning spray pipe passes through the side wall of the combined evaporator and is connected to the gas-liquid separation cleaning liquid inlet pipe.
[0010] As a further technical solution, the combined evaporator also includes an overflow annular water distribution tray, a porous secondary water distribution tray and a liquid-feed membrane distributor. The overflow annular water distribution tray, the porous secondary water distribution tray and the liquid-feed membrane distributor are arranged in sequence from top to bottom above the upper port of the heat exchange tube. The liquid phase material separated by the coalescing separator enters the integrated evaporator through the material conveying pump and then forms a uniform and stable film through the overflow annular water distribution tray, the porous secondary water distribution tray and the liquid-feed membrane distributor, and flows downward at a uniform speed along the wall of the heat exchange tube.
[0011] As a further technical solution, the combined evaporator also includes a packing section wire mesh demister, a trough distributor, a packing cleaning liquid inlet pipe, a packing cleaning liquid inlet and a packing support plate. The packing support plate is arranged on the upper and lower ends of the packing, the trough distributor is arranged on the packing support plate above the packing, the packing section wire mesh demister is arranged above the trough distributor, and the packing cleaning liquid inlet pipe is horizontally arranged in the combined evaporator shell between the packing section wire mesh demister and the trough distributor. One end of the packing cleaning liquid inlet pipe passes through the combined evaporator shell and is connected to the packing cleaning liquid inlet.
[0012] As a further technical solution, the coalescing separator also includes a separation cleaning liquid inlet pipe and a separation spray cleaner. The separation cleaning liquid inlet pipe is vertically arranged, the upper part of the separation cleaning liquid inlet pipe is arranged above the coalescing separator shell, and the lower part of the separation cleaning liquid inlet pipe extends into the coalescing separator. The separation spray cleaner is arranged at the lower part of the separation cleaning liquid inlet pipe in front of the separation filter element.
[0013] As a further technical solution, the coalescing separator also includes a separation vent and a separation wire mesh demister. The separation vent is arranged on the coalescing separator shell above the overflow baffle, and the separation wire mesh demister is arranged in the coalescing separator shell at the position corresponding to the separation vent.
[0014] As a further technical solution, it also includes a separator level gauge, a separator thermometer, a separator pressure gauge, a separator safety valve, a separator manhole, an evaporator safety valve, an evaporator pressure gauge, an evaporator sight glass and an evaporator manhole. The two separator level gauges are respectively arranged at the upper and lower positions of the front end of the coalescing separator, and the separator thermometer, separator pressure gauge and separator safety valve are respectively arranged on the upper shell of the coalescing separator corresponding to the coalescing filter element and the separation filter element, and the separator manhole is arranged on the upper shell of the rear part of the coalescing separator; the evaporator safety valve and evaporator pressure gauge are respectively arranged on the top of the combined evaporator shell, and the evaporator sight glass and evaporator manhole are respectively arranged on the outside of the combined evaporator shell corresponding to the evaporation chamber in the combined evaporator.
[0015] The beneficial effects of adopting the above technical solution are: an integrated evaporation device applied to carbonyl synthesis process, through this technical solution, first, the coalescing filter element and the separation filter element of the coalescing separator are used to perform multiple separations on the products after the catalytic reaction, and then the baffle is used to separate the oil and water, and the catalyst solution of the aqueous phase is drawn out through the bottom of the weight hammer, and the reaction products of the oil phase are collected in the space behind the baffle and finally drawn out at the bottom. The air released from the top is defoamed by the wire mesh and then enters the olefin absorption. After multiple separations, the efficient separation of the aqueous phase catalyst is guaranteed, so that most of the catalyst is free from the influence of the subsequent high temperature of evaporation on its activity. Moreover, after the flushing setting, the relevant coalescing elements are not easy to clog, the equipment failure rate is low, and it can be continuously operated for a long period of time to meet production needs; second, the falling film heating section in the above-mentioned combined evaporator is used to evaporate the oil phase product after coalescence separation. The product is subjected to the action of the water distribution tray and the film distributor twice, which can achieve the effect of uniform and stable film distribution and smooth flow, thereby improving the heat exchange efficiency of the falling film evaporation. In addition, after the product is heated by falling film, the liquid phase product containing part of the catalyst returns to the catalytic reaction system through the bottom evaporation chamber, reducing the residence time in the evaporator; the gas phase product enters the gas-liquid separation upward through the central heat exchange tube bundle, and is further heated and evaporated during the process, reducing the liquid entrainment in the rising gas phase, which is conducive to the evaporation and separation of heavy components in the product, controlling the content of its return to the catalytic reaction system, and benefiting the carbonyl synthesis reaction; third, the gas-liquid separation section of the above-mentioned combined evaporator is equipped with a baffle and a wire mesh double-layer demister, which improves the demisting efficiency after double separation, further purifies the gas phase product, and reduces catalyst entrainment loss. In addition, an automatic spray cleaning device is provided to regularly clean the wire mesh demister to prevent scaling and clogging. Fourth, the packing washing section of the above-mentioned combined evaporator is equipped with a single-stage corrugated metal plate structured packing, which has high flux and low liquid holdup. It can effectively wash and absorb the ligand triphenylphosphine entrained in the gas phase product and return it to the reaction system, preventing it from entering the hydrogenation system with the product and affecting the activity of the hydrogenation catalyst; it also reduces triphenylphosphine loss and improves the economic efficiency of the production device. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is the overall workflow diagram of the present utility model.
[0017] Figure 2 It is a schematic diagram of the overall cross-sectional structure of the coalescing separator in the present utility model.
[0018] Figure 3 This is a schematic diagram of the overall cross-sectional structure of the combined evaporator in the present utility model.
[0019] In the figure, 1 is a catalyst material mixer, 2 is a coalescing separator, 3 is a combined evaporator, 4 is a catalyst material feed pipe, 5 is a water phase material discharge pipe, 6 is an oil phase material discharge pipe, 7 is a liquid phase material feed pipe, 8 is a liquid phase material discharge port, 9 is a material conveying pump, 10 is a replay pump, 11 is a coalescing filter element, 12 is a separation filter element, 13 is an overflow baffle, 14 is a heavy hammer mechanism, 15 is a packing layer, 16 is a gas-liquid separation section, 17 is a heat exchange tube, 18 is a heating chamber, 19 is a hot water inlet, 20 is a hot water outlet, 21 is a central tube bundle, 22 is an evaporation chamber, 23 is a secondary gas phase product outlet, 24 is a wire mesh demister, 25 is a baffle demister, and 26 is a gas-liquid separation cleaning spray pipe. , 27 gas-liquid separation cleaning liquid inlet, 28 overflow annular water distribution tray, 29 porous secondary water distribution tray, 30 liquid membrane distributor, 31 packing section wire mesh demister, 32 trough distributor, 33 packing cleaning liquid inlet pipe, 34 packing support plate, 35 separation cleaning liquid inlet pipe, 36 separation spray cleaner, 37 separation vent, 38 separation wire mesh demister, 39 separator level gauge, 40 separator thermometer, 41 separator pressure gauge, 42 separator safety valve, 43 separator manhole, 44 evaporator safety valve, 45 evaporator pressure gauge, 46 evaporator sight glass, 47 evaporator manhole, 48 packing cleaning liquid inlet. DETAILED DESCRIPTION
[0020] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
[0021] like Figure 1-Figure 3 As shown, the utility model involves an integrated evaporation device for carbonyl synthesis process, including a catalyst material mixer 1, a coalescing separator 2 and a combined evaporator 3, wherein a catalyst material feed pipe 4 is provided on the upper front portion of the coalescing separator 2, a water phase material discharge pipe 5 is provided at the middle position below the coalescing separator 2, an oil phase material discharge pipe 6 is provided at the lower rear portion of the coalescing separator 2, a liquid phase material feed pipe 7 is provided in the middle portion of the combined evaporator 3, and a liquid phase material discharge port 8 is provided at the bottom of the combined evaporator 3. The output end of the catalyst material mixer 1 is connected to the catalyst material feed pipe 4 of the coalescing separator 2 through a connecting pipeline, the oil phase material discharge pipe 6 of the coalescing separator 2 is connected to the liquid phase material feed pipe 7 of the combined evaporator 3 through a connecting pipeline through a material conveying pump 9, the water phase material discharge pipe 5 of the coalescing separator 2 and the liquid phase material discharge port 8 of the combined evaporator 3 are connected in parallel through a connecting pipeline, and then connected to the input end of the catalyst material mixer 1 through a playback pump 10.
[0022] As a further embodiment, the coalescing separator 2 also includes a coalescing filter element 11, a separation filter element 12 and an overflow baffle 13. The coalescing filter element 11 is encapsulated in the coalescing separator 2 shell at a position behind the catalyst material feed pipe 4, and the separation filter element 12 is encapsulated in the coalescing separator 2 shell at a position behind the water phase material discharge pipe 5, and the overflow baffle 13 is vertically upward, and the upper end of the overflow baffle 13 is higher than or equal to the horizontal center position of the coalescing separator 2 shell, and is arranged behind the separation filter element 12 of the coalescing separator 2 and in front of the oil phase material discharge pipe 6 of the coalescing separator 2.
[0023] As a further embodiment, the catalyst material feed pipe 4 extends from the upper outer side of the coalescing separator 2 shell into the coalescing separator 2 shell, and the discharge port of the catalyst material feed pipe 4 is arranged at the lower position inside the coalescing separator 2 shell; the coalescing separator 2 also includes a weight mechanism 14, and the water phase material discharge pipe 5 is arranged below the weight mechanism 14, and the weight mechanism 14 is fixed above the corresponding bottom position of the coalescing separator 2 shell.
[0024] As a further embodiment, the combined evaporator 3 further includes a packing layer 15, a gas-liquid separation section 16, a heat exchange tube 17, a heating chamber 18, a hot water inlet 19, a hot water outlet 20, a central tube bundle 21, an evaporation chamber 22 and a secondary gas product outlet 23, wherein the packing layer 15 is arranged in the upper part of the shell of the combined evaporator 3, the gas-liquid separation section 16 is arranged below the packing layer 15 of the combined evaporator 3, the evaporation chamber 22 is arranged in the lower part of the shell of the combined evaporator 3, and the central tube bundle 21 is arranged in the gas-liquid separation section 16 in the shell of the combined evaporator 3 and the evaporation chamber 22 is arranged. In the middle position between the evaporation chambers 22, the heating chamber 18 is sealed around the central tube bundle 21, and several heat exchange tubes 17 are vertically inserted in the heating chamber 18. The upper end of each heat exchange tube 17 is respectively connected to the liquid material feed pipe 7 of the combined evaporator 3, and the lower end of each heat exchange tube 17 is respectively connected to the evaporation chamber 22 located below. The hot water inlet 19 and the hot water outlet 20 are respectively arranged on the shell of the combined evaporator 3 at the corresponding positions of the lower and upper parts of the heating chamber 18. The secondary gas product outlet 23 is arranged on the top of the shell of the combined evaporator 3.
[0025] As a further embodiment, the combined evaporator 3 also includes a wire mesh demister 24, a baffle demister 25, a gas-liquid separation cleaning spray pipe 26 and a gas-liquid separation cleaning liquid inlet 27. The wire mesh demister 24 is arranged at the upper part of the gas-liquid separation section 16 in the combined evaporator 3, the baffle demister 25 is arranged below the wire mesh demister 24, and the gas-liquid separation cleaning spray pipe 26 is horizontally arranged above the wire mesh demister 24. One end of the gas-liquid separation cleaning spray pipe 26 passes through the side wall of the combined evaporator 3 shell and is connected to the gas-liquid separation cleaning liquid inlet 27.
[0026] As a further embodiment, the combined evaporator 3 also includes an overflow annular water distribution tray 28, a porous secondary water distribution tray 29 and a liquid film distributor 30. The overflow annular water distribution tray 28, the porous secondary water distribution tray 29 and the liquid film distributor 30 are arranged in sequence from top to bottom above the upper port of the heat exchange tube 17. After the oil phase material separated by the coalescing separator 2 enters the combined evaporator 3 through the material conveying pump 9, it forms a uniform and stable film through the overflow annular water distribution tray 28, the porous secondary water distribution tray 29 and the liquid film distributor 30 and flows downward at a uniform speed along the tube wall of the heat exchange tube 17.
[0027] As a further embodiment, the combined evaporator 3 also includes a packing section wire mesh demister 31, a trough distributor 32, a packing cleaning liquid inlet pipe 33, a packing cleaning liquid inlet port 48 and a packing support plate 34, wherein the packing support plate 34 is arranged on the upper and lower ends of the packing layer 15, the trough distributor 32 is arranged on the packing support plate 34 located above the packing layer 15, the packing section wire mesh demister 31 is arranged at a position above the trough distributor 32, and the packing cleaning liquid inlet pipe 33 is horizontally arranged in the shell of the combined evaporator 3 between the packing section wire mesh demister 31 and the trough distributor 32, and one end of the packing cleaning liquid inlet pipe 33 passes through the shell of the combined evaporator 3 and is connected to the packing cleaning liquid inlet port 48.
[0028] As a further embodiment, the coalescing separator 2 also includes a separation cleaning liquid inlet pipe 35 and a separation spray cleaner 36. The separation cleaning liquid inlet pipe 35 is vertically arranged, the upper part of the separation cleaning liquid inlet pipe 35 is arranged above the shell of the coalescing separator 2, and the lower part of the separation cleaning liquid inlet pipe 35 extends into the coalescing separator 2. The separation spray cleaner 36 is arranged at the lower part of the separation cleaning liquid inlet pipe 35 in front of the separation filter element 12.
[0029] As a further embodiment, the coalescing separator 2 also includes a separation vent 37 and a separation wire mesh demister 38. The separation vent 37 is arranged on the coalescing separator 2 shell above the overflow baffle 13, and the separation wire mesh demister 38 is arranged in the coalescing separator 2 shell at the position corresponding to the separation vent 37.
[0030] As a further embodiment, it also includes a separator level gauge 39, a separator thermometer 40, a separator pressure gauge 41, a separator safety valve 42, a separator manhole 43, an evaporator safety valve 44, an evaporator pressure gauge 45, an evaporator sight glass 46 and an evaporator manhole 47. The two separator level gauges 39 are respectively arranged at the upper and lower positions of the front end of the coalescing separator 2, and the separator thermometer 40, the separator pressure gauge 41 and the separator safety valve 42 are respectively arranged on the upper shell of the coalescing separator 2 corresponding to the coalescing filter element 11 and the separation filter element 12, and the separator manhole 43 is arranged on the upper shell of the rear part of the coalescing separator 2; the evaporator safety valve 44 and the evaporator pressure gauge 45 are respectively arranged on the top of the shell of the combined evaporator 3, and the evaporator sight glass 46 and the evaporator manhole 47 are respectively arranged on the outside of the shell of the combined evaporator 3 corresponding to the evaporation chamber 22 in the combined evaporator 3.
[0031] In an embodiment of the present utility model, the baffle demister 25 is of S type, with a plate spacing of 30 mm and a height of 180~250 mm; the filter screen of the wire mesh demister 24 and the packing section wire mesh demister 31 is of DP type, with a porosity of 0.95~0.98 and a height of 200~300 mm; the packing layer 15 uses a corrugated metal plate regular packing with a packing porosity of 0.95~0.97 and a height of 2.5~3.5 m.
[0032] When the coalescing separator 2 of the present invention is working, the carbonyl synthesis reaction product and the catalyst enter the front end top of the coalescing separator 2 from the output end of the catalyst material mixer 1 through the catalyst material feed pipe 4, and are sequentially separated from the oil and water after passing through the combined action of the coalescing filter element 11, the separation filter element 12 and the overflow baffle 13, with high filtration accuracy. Thus, the aqueous phase material containing the catalyst passes through the weight mechanism 14 and the aqueous phase material discharge pipe 5, and then returns to the catalyst material mixer 1 through the playback pump 10 for recycling. The oil phase material containing the main product and the catalyst passes over the overflow baffle 13, flows out of the coalescing separator 2 through the oil phase material discharge pipe 6 at the bottom of the rear end of the coalescing separator 2, and then enters the combined evaporator 3 through the liquid phase material feed pipe 7 of the combined evaporator 3 through the material conveying pump 9.
[0033] When the combined evaporator 3 of the present invention is working, after the oil phase product material enters the combined evaporator 3, it enters the heat exchange tube 17 through the overflow annular water distribution tray 28, the porous secondary water distribution tray 29 and the liquid film distributor 30, and forms a uniform and stable film and flows downward at a uniform speed along the wall of the heat exchange tube 17. The heating medium enters the heating chamber 18 from the hot water inlet 19, exchanges heat with the heat exchange tube 17 and is discharged from the heating chamber 18 through the hot water outlet 20, realizing countercurrent wall heat exchange of the material in the heat exchange tube 17. After being heated, the oil phase product material enters the evaporation chamber 22 at the bottom of the combined evaporator 3 from top to bottom, and its aldehydes and other products with lower boiling points move upward in the form of a gas-liquid mixture through the central tube bundle 21 for secondary heating and evaporation. A small amount of catalyst and part of the polymer heavy components are discharged through the liquid phase material discharge port 8 at the bottom of the combined evaporator 3 to be heated and evaporated. The connecting pipelines of the aqueous phase material discharge pipe 5 of the junction separator 2 are merged and transported back to the catalyst material mixer 1 through the replay pump 10, thereby recycling the catalyst to the greatest extent and reducing production costs; the gas-liquid mixture product is further heated by the central tube bundle 21 and enters the gas-liquid separation section 16, whose cylinder diameter is larger, giving the product a larger distribution space. When the gas-liquid mixture flows upward, it first contacts the baffle demister 25 at the lower part of the gas-liquid separation section 16. The larger volume and inertia droplets and solid particles in the gas-liquid mixture collide with it and are separated and settled from the flowing gas. After the initial separation, the remaining gas with mist passes through and continues to contact the wire mesh demister 24 upward, and the mist accumulated on the wire mesh surface is further settled and separated, thereby improving the demisting efficiency and minimizing the entrainment loss of the catalyst. Taking into account the problem that the wire mesh demister 24 may become clogged during long-term operation, thereby causing catalyst loss, a gas-liquid separation cleaning spray pipe 26 is provided above it, and the cleaning liquid is connected from the gas-liquid separation cleaning liquid inlet 27, and the cleaning liquid is cleaned through the nozzles distributed on the gas-liquid separation cleaning spray pipe 26, and then the solvent is recovered, thereby ensuring the long-term stable operation of the equipment; part of the catalyst ligand triphenylphosphine will be entrained in the gas phase product separated and rising from the gas-liquid separation section 16, causing certain losses and poisoning the hydrogenation catalyst. Therefore, a packing layer 15 is provided above the combined evaporator 3, and the gas phase product diffuses into the packing layer 15 and rises. The packing layer 15 is a single-segment metal plate with regular corrugations. The packing has a series of advantages such as low pressure drop, high flux, low liquid holding capacity, not easy to clog, high mass transfer efficiency and low cost. The upper and lower parts are provided with packing support plates 34, which are suitable for the current working conditions. The cleaning liquid can be an aldehyde product. It is cleaned from the packing liquid inlet pipe 33 and is fully and evenly distributed through the trough distributor 32, and then enters the packing layer 15 downward, where it is fully contacted with the rising gas phase. The triphenylphosphine entrained in the gas phase is washed and absorbed into the liquid phase by aldehydes and recycled, thereby improving the economic benefits of the entire equipment. After the cleaning and recycling process is completed, the rising gas phase product is further defoamed by the wire mesh demister 31 of the packing section, and is discharged from the secondary gas phase product outlet 23 to enter the subsequent unit.
[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Claims
1. An integrated evaporation device for carbonyl synthesis process, characterized in that: It includes a catalyst material mixer, a coalescence separator and a combined evaporator, wherein a catalyst material feed pipe is provided above the front of the coalescence separator, a water phase material discharge pipe is provided in the middle position below the middle of the coalescence separator, an oil phase material discharge pipe is provided at the lower rear of the coalescence separator, a liquid phase material feed pipe is provided in the middle of the combined evaporator, and a liquid phase material discharge port is provided at the bottom of the combined evaporator. The output end of the catalyst material mixer is connected with the catalyst material feed pipe of the coalescence separator through a connecting pipeline, the oil phase material discharge pipe of the coalescence separator is connected with the liquid phase material feed pipe of the combined evaporator through a connecting pipeline and a material conveying pump, the water phase material discharge pipe of the coalescence separator and the liquid phase discharge port of the combined evaporator are connected in parallel through a connecting pipeline, and then connected with the input end of the catalyst material mixer through a playback pump.
2. The integrated evaporation device for carbonyl synthesis process according to claim 1, characterized in that: The coalescing separator also includes a coalescing filter element, a separation filter element and an overflow baffle. The coalescing filter element is encapsulated in the coalescing separator shell at a position behind the catalyst material feed pipe, and the separation filter element is encapsulated in the coalescing separator shell at a position behind the water phase material discharge pipe. The overflow baffle is vertically upward, and the upper end of the overflow baffle is higher than or equal to the horizontal center position of the coalescing separator shell, and is arranged behind the separation filter element of the coalescing separator and in front of the liquid phase material discharge pipe of the coalescing separator.
3. The integrated evaporation device for carbonyl synthesis process according to claim 1, characterized in that: The catalyst material feed pipe extends from the upper outer side of the coalescing separator shell into the coalescing separator shell, and the discharge port of the catalyst material feed pipe is arranged at the lower position inside the coalescing separator shell; the coalescing separator also includes a weight mechanism, and the water phase material discharge pipe is arranged below the weight mechanism, and the weight mechanism is fixed above the corresponding bottom position of the coalescing separator shell.
4. The integrated evaporation device for carbonyl synthesis process according to claim 1, characterized in that: The combined evaporator also includes a packing layer, a gas-liquid separation section, a heat exchange tube, a heating chamber, a hot water inlet, a hot water outlet, a central tube bundle, an evaporation chamber and a secondary gas-phase product outlet. The packing layer is arranged in the upper part of the combined evaporator shell, the gas-liquid separation section is arranged below the packing layer of the combined evaporator, the evaporation chamber is arranged in the lower part of the combined evaporator shell, the central tube bundle is arranged in the middle position between the gas-liquid separation section and the evaporation chamber in the combined evaporator shell, the heating chamber seal is arranged around the central tube bundle, and several heat exchange tubes are vertically inserted in the heating chamber. The upper port of each heat exchange tube is respectively connected to the liquid material feed pipe of the combined evaporator, and the lower port of each heat exchange tube is respectively connected to the evaporation chamber located below. The hot water inlet and the hot water outlet are respectively arranged on the combined evaporator shell at the corresponding positions of the lower and upper parts of the heating chamber, and the secondary gas-phase product outlet is arranged on the top of the combined evaporator shell.
5. The integrated evaporation device for carbonyl synthesis process according to claim 1 or 4, characterized in that: The combined evaporator also includes a wire mesh demister, a baffle demister, a gas-liquid separation cleaning spray pipe and a gas-liquid separation cleaning liquid inlet. The wire mesh demister is arranged at the upper part of the gas-liquid separation section in the combined evaporator, the baffle demister is arranged below the wire mesh demister, and the gas-liquid separation cleaning spray pipe is horizontally arranged above the wire mesh demister. One end of the gas-liquid separation cleaning spray pipe passes through the side wall of the combined evaporator and is connected to the gas-liquid separation cleaning liquid inlet pipe.
6. The integrated evaporation device for carbonyl synthesis process according to claim 1 or 4, characterized in that: The combined evaporator also includes an overflow annular water distribution pan, a porous secondary water distribution pan and a liquid-feed membrane distributor, which are arranged in sequence from top to bottom above the upper port of the heat exchange tube. The liquid phase material separated by the coalescing separator enters the integrated evaporator through the material conveying pump and then forms a uniform and stable film through the overflow annular water distribution pan, the porous secondary water distribution pan and the liquid-feed membrane distributor, and flows downward at a uniform speed along the tube wall of the heat exchange tube.
7. The integrated evaporation device for carbonyl synthesis process according to claim 1 or 4, characterized in that: The combined evaporator also includes a packing section wire mesh demister, a trough distributor, a packing cleaning liquid inlet pipe, a packing cleaning liquid inlet and a packing support plate. The packing support plate is arranged on the upper and lower ends of the packing, the trough distributor is arranged on the packing support plate above the packing, the packing section wire mesh demister is arranged above the trough distributor, and the packing cleaning liquid inlet pipe is horizontally arranged in the combined evaporator shell between the packing section wire mesh demister and the trough distributor. One end of the packing cleaning liquid inlet pipe passes through the combined evaporator shell and is connected to the packing cleaning liquid inlet.
8. The integrated evaporation device for carbonyl synthesis process according to claim 1 or 2, characterized in that: The coalescing separator also includes a separation cleaning liquid inlet pipe and a separation spray cleaner. The separation cleaning liquid inlet pipe is vertically arranged, the upper part of the separation cleaning liquid inlet pipe is arranged above the coalescing separator shell, and the lower part of the separation cleaning liquid inlet pipe extends into the coalescing separator. The separation spray cleaner is arranged at the lower part of the separation cleaning liquid inlet pipe in front of the separation filter element.
9. The integrated evaporation device for carbonyl synthesis process according to claim 1 or 2, characterized in that: The coalescing separator further includes a separation vent and a separation wire mesh demister. The separation vent is arranged on the coalescing separator shell above the overflow baffle, and the separation wire mesh demister is arranged in the coalescing separator shell at a position corresponding to the separation vent.
10. The integrated evaporation device for carbonyl synthesis process according to claim 1, characterized in that: It also includes a separator level gauge, a separator thermometer, a separator pressure gauge, a separator safety valve, a separator manhole, an evaporator safety valve, an evaporator pressure gauge, an evaporator sight glass and an evaporator manhole. The two separator level gauges are respectively arranged at the upper and lower positions of the front end of the coalescing separator, and the separator thermometer, the separator pressure gauge and the separator safety valve are respectively arranged on the upper shell of the coalescing separator corresponding to the coalescing filter element and the separation filter element, and the separator manhole is arranged on the upper shell of the rear part of the coalescing separator; the evaporator safety valve and the evaporator pressure gauge are respectively arranged on the top of the combined evaporator shell, and the evaporator sight glass and the evaporator manhole are respectively arranged on the outside of the combined evaporator shell corresponding to the evaporation chamber in the combined evaporator.
Citation Information
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