Evaporation separator for chemical production

Abstract

The utility model discloses an evaporation separator for chemical production, relates to the technical field of evaporation separators, and is used for solving the problem that a urea hydrolysis system is easily blocked due to the fact that a high-concentration urea aqueous solution is easily heated to generate water-insoluble biuret and other condensation compounds. The interception assembly is installed on an original catalytic hydrolysis reactor, the interception assembly is used for blocking impurities in the ventilation process, and the flushing assembly is arranged for regular cleaning, so that the probability that a pipeline is blocked in the ammonia gas preparation process is reduced, the whole flushing time of the pipeline is prolonged, and the production efficiency is improved. The device is specifically composed of a first separator and a second separator, a transmission case drives a rotating shaft to rotate, the rotating angle of a first baffle disc and the rotating angle of a second baffle disc are changed, and when the ventilation end of the catalytic hydrolysis reactor is switched and a connecting rod fixed to the air cylinder end extrudes a complete set of hanging plates, a large-area intercepting space formed by combining the hanging plates is used for intercepting impurities.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of evaporation separator, specifically to a kind of evaporation separator for chemical production. BACKGROUND

[0002] Urea is also called carbamide, molecular weight 60.06, colorless or white needle or rod-shaped crystalline, white slightly reddish solid particles for industrial or agricultural products, odorless and tasteless, density 1.335g / cm3, melting point 132.7℃, soluble in water, alcohol, insoluble in diethyl ether, chloroform, slightly alkaline, can be reacted with acid to generate salt, urea preparation ammonia gas has higher safety relative to ammonia water evaporation and liquid ammonia evaporation technology, in the mature area of city development has gradually replaced liquid ammonia as reducing agent preparation raw material;

[0003] High-concentration urea aqueous solution is easy to generate biuret and other condensates that are difficult to dissolve in water when heated, which is one of the reasons for the easy plugging of urea hydrolysis system, therefore, by using urea hydrolysis process scheme, lower mass concentration of urea aqueous solution can be selected, higher requirement heat tracing pipe and heat tracing device are arranged around ammonia gas pipeline and hydrolysis reactor to avoid plugging of urea solution pipeline, such as the patent with publication number CN221243961U, spiral coil is arranged on the outside top of top cover, and steam is introduced into the spiral coil during use to heat the top cover, so that the temperature of the top is higher than the melting point of biuret, which can prevent biuret from adhering and crystallizing inside the top cover, that is, heat tracing pipe is used for reactor heating, but preventing top cover crystallization will cause the surrounding connecting pipeline to continue to be plugged, therefore, biuret and other condensates generated during the reaction process are intercepted to reduce the concentration of mixture and prolong the cleaning time of the whole pipeline during subsequent system shutdown.

[0004] Therefore, we propose a kind to be used for chemical production evaporative separator. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a kind to be used for chemical production evaporative separator to solve the problems raised in the background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind to be used for chemical production evaporative separator, including catalytic hydrolysis reactor and breather cover, the side of catalytic hydrolysis reactor is sealed with breather cover by bolt fixed, the top of catalytic hydrolysis reactor is connected with separator one and separator two with fixed communication;

[0007] The separator one and the separator two are fixed with a cylinder at the top by bolts, the cylinder is fixed with a connecting rod in the separator one and the separator two, the connecting rod is uniformly sleeved with a hanging plate in the separator one and the separator two, the outer wall of the connecting rod is fixed with a sealing plate at the bottom of the hanging plate, and the top of the sealing plate is uniformly fixed with a plug column by welding.

[0008] Further, the connecting rod is provided with a pressing plate at the top of the hanging plate, the pressing plate abuts against the hanging plate, the separator one and the separator two are communicated with an ammonia gas outlet and a flushing pipe at the top of the pressing plate, and a sealing valve is installed on the flushing pipe.

[0009] Further, the inner wall of the separator one is movably connected with a baffle one at the bottom of the connecting rod, the inner wall of the separator two is movably connected with a baffle two at the bottom of the connecting rod, the top outer wall of the catalytic hydrolysis reactor is fixed with a transmission box by bolts, the transmission box is movably connected with a rotating shaft, and the two ends of the rotating shaft respectively penetrate the separator one and the separator two and are correspondingly fixed with the baffle one and the baffle two.

[0010] Further, the outer walls of the separator one and the separator two are fixedly communicated with a blowdown pipe, a liquid inlet is formed on one side of the separator one and located on the catalytic hydrolysis reactor, and a liquid outlet is formed and installed at the bottom of the catalytic hydrolysis reactor.

[0011] Further, the top of the breather cover is communicated and provided with an air inlet, the bottom outer wall of the breather cover is provided with an air outlet, the breather cover is uniformly and fixedly communicated with a heat conduction pipeline in the catalytic hydrolysis reactor, and the breather cover is separated by a partition plate at the end of the heat conduction pipeline.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] In the utility model, the interception assembly is installed on the original catalytic hydrolysis reactor, the impurities are blocked during the ventilation process by the interception assembly, the flushing assembly is arranged to perform regular cleaning, the probability of pipeline blockage during the preparation of ammonia gas is reduced, the overall flushing time of the pipeline is extended, the separator one and the separator two are used, the rotating shaft is driven to rotate by the transmission box, the rotating angles of the baffle one and the baffle two are changed, the ventilation end of the catalytic hydrolysis reactor is switched, the large-area interception space formed by the combination of the hanging plates is used to intercept biuret and other condensates mixed in the gas when the connecting rod fixed by the cylinder extrudes the complete hanging plate, the hanging plates are relaxed, the flushing liquid flows from inside to outside, the impurities on the hanging plates are dissolved and flushed, the biuret and other condensates are cleaned without affecting the normal exhaust, and the overall cleaning time of the entire pipeline section is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view of the evaporation separator for chemical production of the utility model;

[0015] Figure 2 It is the main view structure schematic view of the evaporation separator for chemical production of the utility model;

[0016] Figure 3 It is the main view section structure schematic view of the evaporation separator for chemical production of the utility model;

[0017] Figure 4 It is the communication schematic view of the catalytic hydrolysis reactor and separator one, separator two of the utility model;

[0018] Figure 5 It is the side connecting rod and hanging plate abutment structure schematic view of the utility model.

[0019] In the figure: 1, catalytic hydrolysis reactor; 2, air cover; 3, air inlet; 4, heat transfer pipeline; 5, air outlet; 6, liquid outlet; 7, liquid inlet; 8, separator one; 9, separator two; 10, transmission box; 11, rotating shaft; 12, baffle one; 13, baffle two; 14, blowdown pipe; 15, cylinder; 16, connecting rod; 17, hanging plate; 18, ammonia gas outlet; 19, flushing pipe; 20, sealing plate; 21, plug column. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0021] Please refer to Figures 1-5 The utility model provides a technical scheme:

[0022] The urea catalytic hydrolysis ammonia preparation technology adds phosphate as catalyst on the basis of mainstream urea hydrolysis ammonia preparation technology, reduces urea hydrolysis reaction temperature, and the catalyst is added once when starting, because the quality of urea is not pure, the urea hydrolysis reactor needs to be regularly discharged, and the catalyst will be consumed with regular discharge, according to the discharge frequency, it needs to be supplemented regularly, and the supplement cycle is half a year to one year, for example, Figure 1 and Figure 2As shown, the bottom of the catalytic hydrolysis reactor 1 is provided with a liquid outlet 6 for regular liquid discharge, and the top of the catalytic hydrolysis reactor 1 is provided with a liquid inlet 7 for adding urea with a mass concentration of 50%, and steam is needed for auxiliary heating during the reaction. Therefore, an air hood 2 is installed on one side of the catalytic hydrolysis reactor 1, and the air hood 2 is divided into two halves by a partition. The air hood 2 is connected with a heat conduction pipeline 4 in the catalytic hydrolysis reactor 1, and the two ends of the heat conduction pipeline 4 are located on the two sides of the air hood 2. The top of the air hood 2 is provided with an air inlet 3, and the steam discharged from the air inlet 3 flows along the heat conduction pipeline 4 to the air outlet 5 side, thereby heating the pipeline and completing the heating of the urea in the catalytic hydrolysis reactor 1.

[0023] To prevent the heating from generating ammonia gas and the biuret and other condensates from staying in the air pipe wall and causing pipe blockage for a long time, a separator one 8 and a separator two 9 are additionally installed on the top of the catalytic hydrolysis reactor 1, as shown in Figure 3 and Figure 4 As shown, the separator one 8 and the separator two 9 work alternately, as shown in Figure 5 The top outer wall of the catalytic hydrolysis reactor 1 is fixedly connected with a transmission box 10, and a motor installed in the transmission box 10 can drive the entire rotating shaft 11 to rotate. The two ends of the rotating shaft 11 are respectively connected with a baffle one 12 and a baffle two 13 in the separator one 8 and the separator two 9. The baffle one 12 and the baffle two 13 are placed at different angles, that is, the rotating shaft 11 rotates by a specific angle to realize the angle rotation of the baffle one 12 and the baffle two 13, thereby realizing the plugging connection of the separator one 8 or the separator two 9, and one side of the two must be connected.

[0024] A gas cylinder 15 is fixedly connected to the top of the separator one 8 and the separator two 9. The gas cylinder 15 is fixedly connected with a connecting rod 16 in the separator one 8 or the separator two 9. A plurality of hanging plates 17 are movably sleeved on the outer wall of the connecting rod 16. The hanging plates 17 are made of urea-grade corrosion-resistant materials. The gas cylinder 15 pushes the pressing plate to extrude the plurality of hanging plates 17, thereby forming a closed interception space. A sealing plate 20 is fixedly sleeved on the connecting rod 16. The top of the sealing plate 20 is uniformly fixed with a plurality of plugging columns 21. Holes are formed in the sealing plate 20. The ammonia gas moving upward from the catalytic hydrolysis reactor 1 passes through the baffle one 12 and the sealing plate 20 to the bottom of the hanging plate 17. When the entire hanging plate 17 is extruded to drive the sealing plate 20 to move downward, the plurality of plugging columns 21 on the sealing plate 20 are separated from the holes on the baffle side to block the holes. The gas will come to the periphery of the hanging plate 17, and finally be discharged from the ammonia gas outlet 18 through the hanging plate 17. The mixed impurities in the ammonia gas are intercepted by the large area of the hanging plate 17 and stay on the outside of the hanging plate 17.

[0025] When the increasing impurities intercepted by the hanging plate 17 affect the normal flow rate, the hanging plate 17 needs to be cleaned, at this time, the transmission box 10 drives the rotating shaft 11 to rotate, changes the rotating direction of the baffle plate one 12 and the baffle plate two 13, and the flushing pipe 19 is used to discharge the flushing liquid to clean the hanging plate 17. The connecting rod 16 is driven by the cylinder 15 to move upwards, the squeezed hanging plate 17 starts to relax, the rising flushing liquid flows from the inside to the outside of the hanging plate 17, the cleaning of the impurities on the hanging plate 17 is completed, the sealing plate 20 connected to the bottom of the connecting rod 16 is used to move, the blocking column 21 and the pressing plate are cyclically moved to drive the hanging plate 17 to move, and the cleaning of the hanging plate 17 is better completed. The flushing liquid finally reaches the side of the baffle plate one 12 and is discharged through the blowdown pipe 14, the cleaning work of the whole hanging plate 17 is completed, and the above work is repeated, most of the impurities in the ammonia gas are intercepted, and the subsequent centralized cleaning time of the pipeline is prolonged.

[0026] The above content is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or use similar ways to replace the described specific embodiments, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims.

[0027] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0028] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details and limit the utility model to the specific implementation. Obviously, according to the content of the present specification, many modifications and changes can be made. The present specification selects and describes these embodiments in order to better explain the principles and practical application of the utility model, so that those skilled in the art can well understand and use the utility model. The utility model is limited by the claims and the whole scope and equivalents thereof.

Claims

1. An evaporation separator for chemical production, comprising a catalytic hydrolysis reactor (1) and a vent hood (2), one side of the catalytic hydrolysis reactor (1) being sealed with the vent hood (2) by bolt fixation, characterized in that: The top of the catalytic hydrolysis reactor (1) is communicated with a separator one (8) and a separator two (9); The top of the separator one (8) and the separator two (9) is bolted with a cylinder (15), the end of the cylinder (15) is fixedly connected with a connecting rod (16) in the separator one (8) and the separator two, the separator one (8) and the separator two (9) are uniformly and stably connected with a hanging plate (17) outside the connecting rod (16), the outer wall of the connecting rod (16) and the bottom of the hanging plate (17) are fixedly connected with a sealing plate (20), and the top of the sealing plate (20) is uniformly welded with a plug column (21).

2. The evaporative separator for chemical production according to claim 1, characterized in that: The top of the connecting rod (16) is provided with a pressing plate abutting against the hanging plate (17), the top of the pressing plate is communicated with an ammonia gas outlet (18) and a flushing pipe (19) in the separator one (8) and the separator two (9), and the flushing pipe (19) is provided with a sealing valve.

3. The evaporative separator for chemical production according to claim 2, characterized in that: The inner wall of the separator one (8) and the bottom of the connecting rod (16) are movably connected with a baffle one (12), the inner wall of the separator two (9) and the bottom of the connecting rod (16) are movably connected with a baffle two (13), the top of the catalytic hydrolysis reactor (1) is bolted with a transmission box (10), the transmission box (10) is movably connected with a rotating shaft (11), and the two ends of the rotating shaft (11) are respectively penetrated through the separator one (8) and the separator two (9) and are correspondingly fixed with the baffle one (12) and the baffle two (13).

4. The evaporative separator for chemical production according to claim 3, characterized in that: The outer wall of the separator one (8) and the separator two (9) is communicated with a blowdown pipe (14), one side of the separator one (8) and the top of the catalytic hydrolysis reactor (1) are provided with a liquid inlet (7), and the bottom of the catalytic hydrolysis reactor (1) is provided with a liquid outlet (6).

5. The evaporative separator for use in chemical production according to claim 4, characterized in that: The top of the vent hood (2) is communicated with an air inlet (3), the bottom of the vent hood (2) is provided with an air outlet (5), the vent hood (2) is uniformly and fixedly connected with a heat conduction pipeline (4) in the catalytic hydrolysis reactor (1), and the vent hood (2) is separated by a partition plate.

Images