Esterification tower tail gas condenser for butyl acetate production

Abstract

The utility model discloses an esterification tower tail gas condenser for butyl acetate production, and belongs to the technical field of esterification tower tail gas condensation. Comprising a reaction tower, and a tail gas channel is arranged on the outer wall of the reaction tower. According to the esterification tower disclosed by the utility model, the cooling cavity II with the hollow arc-shaped plate, the perforated plate with the thin pipe and the cooling cavity I with the heat exchange calandria are matched with tail gas and cooling water to realize countercurrent non-contact heat dissipation, and the condensation effect of the tail gas of the esterification tower for producing butyl acetate is improved by utilizing multiple times of cooling; the tail gas of the esterification tower is condensed more thoroughly, and the process effect of condensing and recycling the tail gas of the esterification tower is improved; according to the tail gas condenser, the modularized cooling cavity I, the modularized cooling cavity II, the porous plate, the partition net I and the partition net II are matched with the limiting strip and the locking screw rod for locking, so that components in the tail gas condenser can be conveniently disassembled, overhaul and later maintenance of devices in the condenser are facilitated, and the condenser is more convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of esterification tower tail gas condensation, and more specifically to an esterification tower tail gas condenser for butyl acetate production. Background Art

[0002] Butyl acetate is an organic compound with the chemical formula C6H 12 O2. It is an ester compound formed by the reaction of butanol and acetic acid. Butyl acetate is a colorless liquid with a fruity aroma and is widely used in solvents, coatings, inks, fragrances and cosmetics. In addition, butyl acetate can also be used as an industrial solvent, such as in the production of paints, coatings and adhesives.

[0003] The esterification tower tail gas condenser is a device used in the esterification reaction production process of butyl acetate, etc., to cool and condense the unreacted raw material vapor and a small amount of product in the esterification tower tail gas. The function of this condenser is to cool the steam in the esterification tower tail gas into liquid, thereby achieving the purpose of recovery and purification.

[0004] The patent document with announcement number CN206897096U in the prior art provides a tail gas condenser. The device is arranged in a condensate tank inside a cylinder, and has a tail gas outlet upper head arranged on the top of the cylinder. The upper part of the condensate tank is provided with a tail gas inlet and the lower part is provided with a condensate outlet. The upper part of the cylinder is provided with a cooling water outlet and the lower part is provided with a cooling water inlet. The heat exchange tube is arranged in the cylinder, and the scraper sleeve is arranged on the heat exchange tube to achieve the scraping and lifting recovery effect on the heat exchange tube. Although the device has many beneficial effects, the following problems still exist: the device uses a one-time countercurrent cooling, so that when the tail gas of the esterification tower used in the production of butyl acetate is condensed, the tail gas is directly discharged after passing through the heat exchange component, and the cooling effect on the tail gas is poor, so that the chemical components in the tail gas cannot be well condensed; and the heat exchange component inside the tail gas condenser adopts an integrated setting, which is not easy to disassemble, so that the later inspection and maintenance of the cooling water channel inside the heat exchange component are inconvenient, which is not conducive to the long-term use of the condenser. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The utility model aims to provide an esterification tower tail gas condenser for butyl acetate production, so as to solve the problems in the above background technology that the existing tail gas cooling is not thorough and is not convenient for disassembly and maintenance.

[0007] 2. Technical solution

[0008] An esterification tower tail gas condenser for producing butyl acetate, comprising:

[0009] A reaction tower, wherein an exhaust gas channel is disposed on the outer wall of the reaction tower, a bracket is disposed on the right side of the reaction tower, a shell is disposed on the top of the bracket, and a water inlet is disposed on the side wall of the shell;

[0010] A bottom pool, wherein the bottom pool is arranged inside the shell, a cooling chamber 1 is arranged on the top of the bottom pool, a heat exchange pipe is arranged inside the cooling chamber 1, a porous plate is arranged on the top of the cooling chamber 1, a plurality of thin tubes are embedded inside the porous plate, a partition net 1 is arranged on the top of the porous plate, a cooling chamber 2 is arranged on the top of the partition net 1, a plurality of hollow arc-shaped plates are arranged inside the cooling chamber 2, a partition net 2 is arranged on the top of the cooling chamber 2, and a discharge piece is arranged on the top of the partition net 2;

[0011] A bottom piece, the bottom piece is arranged on the side wall of the bottom pool, a limiting hole is opened on the top of the bottom piece, a fixing block is arranged on one side wall of the partition net, limiting strips are arranged at both ends of the fixing block, a limiting part is arranged on an outer wall of the cooling chamber, a top part is arranged on the side wall of the discharge part, and a locking screw passes through the top of the top part.

[0012] Preferably, the second cooling chamber is arranged at the input end of the exhaust gas channel, and a square opening is opened at the top of the second cooling chamber.

[0013] Preferably, a plurality of vertical tubes are provided on the second right side wall of the cooling chamber, and a horizontal tube is provided at the bottom of the vertical tubes.

[0014] Preferably, the transverse tube is arranged at the input end of the capillary tube, and a connecting tube is arranged at the output end of the capillary tube.

[0015] Preferably, the heat exchange exhaust pipe is arranged at the output end of the connecting pipe, and a fixing seat fixedly connected to the cooling chamber 1 is arranged at the bottom of the heat exchange exhaust pipe.

[0016] Preferably, a centralized discharge pipe is provided at the output end of the heat exchange exhaust pipe, and the centralized discharge pipe is fixedly connected to the bottom of the cooling chamber 1.

[0017] Preferably, the centralized discharge pipe is fitted into the interior of the bottom pool, and a circular hole fitting into the bottom pool is provided on the side wall of the bottom pool.

[0018] Preferably, a drain pipe is provided on the top of the discharge member, and the discharge member is in a rectangular parallelepiped structure.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] The utility model realizes countercurrent non-contact heat dissipation by arranging a cooling chamber 2 with a hollow arc plate, a porous plate with thin tubes, and a cooling chamber 1 with a heat exchange row pipe in cooperation with the tail gas and cooling water, and utilizes multiple cooling to improve the condensation effect of the tail gas of the esterification tower used in the production of butyl acetate, so that the tail gas of the esterification tower is condensed more thoroughly, and the process effect of the condensation and recycling of the tail gas of the esterification tower is improved; by arranging a modular cooling chamber 1, a cooling chamber 2, a porous plate, a partition net 1 and a partition net 2 in cooperation with a limit strip and a locking screw for locking, the components inside the tail gas condenser can be conveniently disassembled, which is convenient for the inspection and later maintenance of the devices inside the condenser, and the modular setting can eliminate the need for overall replacement of the device when it is damaged, thereby reducing the economic cost of the long-term operation and maintenance of the condenser and making the use of the condenser more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the disassembly of the internal components of the housing of the utility model;

[0024] Figure 3 It is a cross-sectional schematic diagram of the cooling chamber 2 and the porous plate of the utility model;

[0025] Figure 4 For the utility model Figure 2 A magnified schematic diagram of position A in the middle;

[0026] Figure 5 For the utility model Figure 2 A magnified schematic diagram of position B in the middle;

[0027] Explanation of the numbers in the figure: 100, reaction tower; 110, bracket; 120, shell; 121, water inlet; 122, exhaust gas channel; 200, bottom pool; 210, cooling chamber 1; 211, heat exchange exhaust pipe; 212, centralized discharge pipe; 220, porous plate; 221, capillary tube; 222, connecting pipe; 230, partition net 1; 240, cooling chamber 2; 241, hollow arc plate; 242, vertical pipe; 243, horizontal pipe; 250, partition net 2; 260, discharge piece; 300, bottom piece; 301, limiting hole; 310, limiting piece; 320, fixing block; 321, limiting strip; 330, top piece; 331, locking screw. DETAILED DESCRIPTION

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0030] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] See also Figure 1-5 , the utility model provides a technical solution:

[0032] An esterification tower tail gas condenser for producing butyl acetate, comprising:

[0033] The outer wall of the reaction tower 100 is provided with an exhaust gas channel 122, which is made of a common copper alloy on the market. A bracket 110 is provided on the right side of the reaction tower 100, and the bracket 110 is made of stainless steel as a whole. The top of the bracket 110 is fixedly connected with a shell 120 by bolts, and the side wall of the shell 120 is provided with a water inlet 121;

[0034] In some embodiments, the water inlet 121 is the water inlet channel of the cooling water of the condenser, and the channel is connected to an external cooling water supply device through a pipeline. The pipeline can be a common stainless steel pipeline, and a common thermal insulation cotton is arranged on the outside of the pipeline to reduce the excessive heat exchange between the cooling water and the air during the flow of the pipeline, which affects the cooling effect. The cooling water supply device can be a common water pump, a water tank, a pipeline and a control system on the market, which is used to extract cooling water from the water tank and transport it to the equipment or machine that needs to be cooled to reduce its temperature and keep it within its normal operating temperature range. The water pump can be a common pump on the market, the water tank is used to store water, and the control system can be a common control panel, which can be used A control box of Siemens brand with model number 6ES7515-2AM02-0AB0 is used to control the start and stop of the water pump and the power on and off of the entire device. The cooling equipment is a common closed cooling tower. The water cooling process of the closed cooling tower is carried out in a closed circulation system. The water circulates continuously in the circulation system and does not come into direct contact with the atmosphere. The cooling water of the closed cooling tower is pumped out from the water pool by the cooling tower pump, and enters the cooling tower after being pressurized by the water pump. Heat exchange is carried out with the air in the tower. After the water temperature is lowered, it returns to the water pool and the cycle is repeated. The advantage of a closed cooling tower is that the cooling water does not come into direct contact with the atmosphere, so it is not affected by the atmospheric environment, the water quality is stable, and the cooling efficiency is high.

[0035] The bottom pool 200 is disposed inside the housing 120, a cooling chamber 210 is disposed on the top of the bottom pool 200, and a heat exchange pipe 211 is disposed inside the cooling chamber 210;

[0036] In some embodiments, the outer diameters of the modules inside the condensation assembly are the same, and rubber sealing rings can be added between the modules. The rubber sealing rings use common silicone rubber sealing rings on the market. The components of silicone rubber and silicone rubber sealing rings mainly include silicone rubber, fillers, plasticizers, vulcanizers, coupling agents, etc. Among them, silicone rubber is the main raw material, accounting for 50% of the silicone rubber sealing ring. Fillers are the main reinforcing agent of silicone rubber sealing rings, which are mainly used to improve the strength and hardness of silicone rubber sealing rings. Plasticizers are the main softeners of silicone rubber sealing rings, which are mainly used to reduce the hardness of silicone rubber sealing rings and improve their flexibility. Vulcanizers are the main cross-linking agents of silicone rubber sealing rings, which are mainly used to cross-link silicone rubber molecular chains to make silicone rubber sealing rings elastic. , Coupling agent is the main surfactant of silicone rubber sealing ring, which is mainly used to improve the surface activity of silicone rubber sealing ring and make silicone rubber sealing ring better combined with other materials. The advantages of silicone rubber sealing ring are: high temperature resistance, silicone rubber sealing ring has better high temperature resistance than other rubber sealing rings, and will not be deformed or damaged when used for a long time at temperatures below 200℃; low temperature resistance, silicone rubber sealing ring has better low temperature resistance than other rubber sealing rings, and will not be deformed or damaged when used for a long time at temperatures below -40℃; corrosion resistance, silicone rubber sealing ring has good corrosion resistance and can resist corrosion from various chemical substances such as acid, alkali, and salt; aging resistance, silicone rubber sealing ring has good aging resistance and can be used for 10 years under normal conditions of use.

[0037] A porous plate 220 is arranged on the top of the cooling chamber 1 210, and a plurality of holes are opened on the top of the porous plate 220. A plurality of thin tubes 221 are embedded in the porous plate 220, and the thin tubes 221 are not connected to the holes. A partition net 1 230 is arranged on the top of the porous plate 220, and a common stainless steel net is arranged inside the partition net 1 230. A cooling chamber 240 is arranged on the top of the partition net 1 230, and a plurality of hollow arc plates 241 are arranged inside the cooling chamber 240, and a channel for exhaust gas flow is arranged inside the hollow arc plates 241. A partition net 250 is arranged on the top of the cooling chamber 240, and a discharge member 260 is arranged on the top of the partition net 250. The discharge member 260 is used to fix the drain pipe of the condenser to the condenser;

[0038] The bottom sheet 300 is tightly welded to the side wall of the bottom pool 200, and a limiting hole 301 is opened at the top of the bottom sheet 300. A fixing block 320 is arranged on the side wall of the partition net 230, and limiting strips 321 are tightly welded at both ends of the fixing block 320. The limiting strips 321 can be made of stainless steel plates commonly available on the market. A limiting member 310 is arranged on the outer wall of the cooling chamber 210, and the limiting member 310 is cut from stainless steel. A top member 330 is arranged on the side wall of the discharge member 260, and a locking screw 331 passes through the top of the top member 330.

[0039] Specifically, the cooling chamber 240 is threadedly connected to the input end of the exhaust gas channel 122. A common pressure pump on the market can be set at the half of the exhaust gas channel 122 to increase the pressure of the exhaust gas and reduce blockage in the hollow arc plate 241 and the capillary 221 as well as the connecting pipe 222, the horizontal pipe 243 and the vertical pipe. A square opening is opened at the top of the cooling chamber 240.

[0040] Furthermore, a plurality of vertical tubes 242 are fixedly connected to the right side wall of the second cooling chamber 240 by bolts, and a horizontal tube 243 is tightly welded to the bottom of the vertical tube 242 .

[0041] Furthermore, the transverse tube 243 is threadedly connected to the input end of the capillary tube 221 , and a connecting tube 222 is provided at the output end of the capillary tube 221 .

[0042] Furthermore, the heat exchange exhaust pipe 211 is tightly welded to the output end of the connecting pipe 222. The heat exchange exhaust pipe 211 is made of common copper alloy. A fixing seat is provided at the bottom of the heat exchange exhaust pipe 211, which is fixed to the cooling chamber 210 by bolts for fixing the heat exchange exhaust pipe 211.

[0043] Furthermore, a centralized discharge pipe 212 is provided at the output end of the heat exchange exhaust pipe 211 , and the centralized discharge pipe 212 is fixedly connected to the bottom of the cooling chamber 1 210 .

[0044] It is worth noting that the centralized discharge pipe 212 is matched with the interior of the bottom pool 200 , and a circular hole matched with the bottom pool 200 is opened on the side wall of the bottom pool 200 .

[0045] It is worth noting that a drain pipe is provided on the top of the discharge member 260, and the discharge member 260 is a rectangular parallelepiped structure.

[0046] In some embodiments, the electrical components and electrical equipment mentioned above all use external power sources.

[0047] In addition, the circuits, electronic components and modules involved in the utility model are all prior art, and can be fully implemented by those skilled in the art. Needless to say, the content protected by the utility model does not involve improvements to the internal structure and method.

[0048] Working principle: When the condenser is needed to condense the tail gas, the tail gas in the reaction tower 100 enters the cooling chamber 240 through the tail gas channel 122. At this time, the cooling water enters the bottom pool 200 through the water inlet 121 on the side wall of the shell 120. As the amount of water in the bottom pool 200 increases, the water level inside the condensation component rises, so that the cooling chamber 1 210 and the cooling chamber 2 240 are filled with cooling water. The cooling water is discharged from the top of the discharge piece 260 at the top of the condenser. At the same time, the tail gas passes through the left side wall of the cooling chamber 240 and enters the hollow arc plate 241. The larger arc surface area of ​​the hollow arc plate 241 is used to exchange heat with the cooling water inside the cooling chamber 240 to achieve preliminary cooling. Then the tail gas passes through the vertical pipe 242. The exhaust gas enters into the transverse tube 243 and enters into the thin tube 221 of the porous plate 220 through the transverse tube 243, and the cooling water flows upward through the holes of the porous plate 220, and the exhaust gas in the thin tube 221 is cooled again, and then the exhaust gas enters into the connecting tube 222 from the thin tube 221 and enters into the heat exchange exhaust pipe 211, at this time, the cooling water inside the cooling chamber is used to cool and condense the air in the heat exchange exhaust pipe 211 again, and finally, the condensed liquid can enter into the centralized exhaust pipe 212 through the bottom of the heat exchange exhaust pipe 211, and finally be discharged from the pipeline of the centralized exhaust pipe 212, and the multiple cooling is used to improve the condensation effect of the exhaust gas of the esterification tower used in the production of butyl acetate, so that the exhaust gas of the esterification tower is condensed more thoroughly, and the process effect of the condensation and recycling of the esterification tower is improved. When the condenser needs to be disassembled, first open the outer shell 120 and take out the condensation component, then loosen the nut of the locking bolt of the bottom piece 200. At this time, the locking screw 331 can be pulled out from the bottom piece 300 and the top part 330, and then keep the partition net 250 in place and slide each module upward or downward in conjunction with the limit strip 321. Each module can be disassembled, so that the components inside the exhaust gas condenser can be easily disassembled, which is convenient for the inspection and later maintenance of the devices inside the condenser, making the use of the condenser more convenient.

[0049] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An esterification tower tail gas condenser for butyl acetate production, characterized in that: include: A reaction tower (100), wherein an exhaust gas channel (122) is disposed on an outer wall of the reaction tower (100), a bracket (110) is disposed on the right side of the reaction tower (100), a housing (120) is disposed on the top of the bracket (110), and a water inlet (121) is disposed on a side wall of the housing (120); A bottom pool (200), wherein the bottom pool (200) is arranged inside the outer shell (120), a cooling chamber (210) is arranged on the top of the bottom pool (200), a heat exchange discharge pipe (211) is arranged inside the cooling chamber (210), a porous plate (220) is arranged on the top of the cooling chamber (210), a plurality of thin tubes (221) are embedded inside the porous plate (220), a partition net (230) is arranged on the top of the porous plate (220), a cooling chamber (240) is arranged on the top of the partition net (230), a plurality of hollow arc plates (241) are arranged inside the cooling chamber (240), a partition net (250) is arranged on the top of the cooling chamber (240), and a discharge member (260) is arranged on the top of the partition net (250); A bottom plate (300), the bottom plate (300) is arranged on the side wall of the bottom pool (200), a limiting hole (301) is opened on the top of the bottom plate (300), a fixing block (320) is arranged on the side wall of the partition net (230), limiting strips (321) are arranged at both ends of the fixing block (320), a limiting member (310) is arranged on the outer wall of the cooling chamber (210), a top member (330) is arranged on the side wall of the discharge member (260), and a locking screw (331) passes through the top of the top member (330).

2. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 1, characterized in that: The second cooling chamber (240) is arranged at the input end of the exhaust gas channel (122), and a square opening is opened at the top of the second cooling chamber (240).

3. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 2, characterized in that: The right side wall of the second cooling chamber (240) is provided with a plurality of vertical pipes (242), and the bottom of the vertical pipes (242) is provided with a horizontal pipe (243).

4. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 3, characterized in that: The transverse tube (243) is arranged at the input end of the capillary tube (221), and a connecting tube (222) is arranged at the output end of the capillary tube (221).

5. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 4, characterized in that: The heat exchange exhaust pipe (211) is arranged at the output end of the connecting pipe (222), and a fixing seat fixedly connected to the cooling chamber 1 (210) is arranged at the bottom of the heat exchange exhaust pipe (211).

6. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 5, characterized in that: The output end of the heat exchange exhaust pipe (211) is provided with a centralized exhaust pipe (212), and the centralized exhaust pipe (212) is fixedly connected to the bottom of the cooling chamber 1 (210).

7. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 6, characterized in that: The centralized discharge pipe (212) is matched with the interior of the bottom pool (200), and a circular hole matched with the bottom pool (200) is opened on the side wall of the bottom pool (200).

8. The tail gas condenser of an esterification tower for producing butyl acetate according to claim 7, characterized in that: A drainage pipe is arranged on the top of the discharge member (260), and the discharge member (260) is in a rectangular parallelepiped structure.

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