Recovery and cyclic utilization system of industrial strong brine for benzodioxole production
Through the recycling system composed of distillation kettle and filler tower, the problem of the inability to recycle concentrated brine in pepper ring production is solved, efficient resource recycling is achieved, production costs and sewage treatment volume are reduced, and economic benefits are created.
Patent Information
- Application Number
- CN202422006584.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In the prior art, the concentrated brine generated during the pepper ring production process cannot be effectively recycled, resulting in high costs and waste of water resources, and direct discharge into the sewage treatment system will increase the production costs of the enterprise.
The recycling system consisting of a distillation kettle and filler tower is used to treat concentrated brine through distillation and adsorption purification, sodium chloride is recovered and purified water can be generated directly utilized. The heat exchange efficiency is improved by using a segmented jacket, combined with stirring and sensor monitoring, and efficient recycling and resource utilization are achieved.
It significantly reduces the amount and cost of sewage treatment, saves fresh water, improves resource utilization, reduces pollution, and creates economic benefits.
Smart Images
Figure CN223060748U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical fields of piperylene production and wastewater treatment, in particular to a recovery and recycling system for industrial concentrated brine used in piperylene production. Background Art
[0002] Piperylene, chemically named 1,2-methylenedioxybenzene, is widely used in the preparation of low-toxic pesticides, berberine, heliotropin, sesamol, antioxidants, etc. Piperylene and its derivatives have attracted wide attention due to their special biochemical activities. Due to the needs of social development, the output of piperylene is increasing day by day, and the treatment of waste salt and water generated in the production process has gradually become the focus of production. At present, a large amount of concentrated brine is generated in the piperylene production process. The concentrated brine is mainly a sodium chloride solution, and the concentration of the concentrated brine can usually reach more than 32.3%. The sources of the concentrated brine are mainly divided into three parts: one part is the effluent from the alkali preparation process, accounting for about 63%; one part is the washing effluent from the washing process, accounting for about 27.2%; one part is the generated water in the reaction process, accounting for about 9.8%.
[0003] Since the concentrated brine generated in the piperylene production process is rich in sodium chloride, in order to ensure product quality and meet environmental protection requirements, it is necessary to remove the sodium salt in the concentrated brine in the subsequent process. In the prior art, the concentrated brine is often directly discharged into the sewage treatment system. However, the salt content of the concentrated brine discharged directly into the regulating tank of the sewage treatment system is higher than 32%. At this time, the concentration of the concentrated brine is relatively high and it cannot directly enter the biochemical system of the sewage treatment, otherwise the bacteria in the biochemical system will die. It can only be diluted with other water until the salt content is lower than 1% and then subjected to biochemical treatment, which results in a significant increase in the enterprise's water use cost, sewage treatment cost and production cost, and is prone to waste of water resources. In addition, a large amount of sodium chloride in the concentrated brine is directly biochemically treated without being recycled, which also leads to waste of by-product resources in production.
[0004] Therefore, the technical problem of how to treat the industrial concentrated brine in piperylene production, effectively separate and recover the effective component of sodium chloride therein, and realize the resource recovery and utilization of low-cost wastewater in production enterprises is extremely urgent. Content of the Utility Model
[0005] The utility model provides a recovery and recycling system for industrial concentrated brine used in piperylene production to solve the problems in the prior art that the sodium chloride in the concentrated brine cannot be recycled and the treatment cost of the concentrated brine is relatively high.
[0006] Specifically, the present utility model provides a recovery and recycling system for industrial concentrated brine used in the production of piperylene, comprising: a distillation kettle, the material inlet at the top of the distillation kettle is connected to a concentrated brine collection tank, and the gas-phase outlet at the top of the distillation kettle is connected to the gas-phase inlet at the bottom of a packing tower; the purified gas outlet at the top of the packing tower is connected to the material inlet of a condenser, and the material outlet of the condenser is connected to the inlet of a water receiving tank; the outlet of the water receiving tank is connected to an alkali preparation process, a water washing process, and a circulation water pool through pipelines respectively; the material outlet at the bottom of the distillation kettle is connected to the material inlet of a centrifuge, the material outlet of the centrifuge is connected to the inlet of a dryer, the outlet of the dryer is connected to a packaging machine, and the packaging machine is connected to a by-product warehouse.
[0007] Preferably, the packing tower comprises a tower body, an adsorption cavity is arranged inside the tower body, and both the upper and lower sides of the adsorption cavity are supported by grids; the adsorption cavity is divided into a vertical cavity and a spiral cavity by a cylindrical support frame, and a spiral partition plate is arranged between the inner wall of the tower body and the vertical cavity, and the partition plate makes the gas guiding channel in the spiral cavity be spiral; regular packing is placed in the vertical cavity, and random packing is placed in the spiral cavity.
[0008] Preferably, the regular packing is wire mesh corrugated packing; the random packing is activated carbon packing or resin packing.
[0009] Preferably, a segmented jacket is arranged outside the distillation kettle; the segmented jacket comprises a first jacket, a second jacket, and a third jacket arranged in sequence from top to bottom; a first feed pipe, a second feed pipe, and a third feed pipe are respectively arranged corresponding to the first jacket, the second jacket, and the third jacket; a first discharge pipe, a second discharge pipe, and a third discharge pipe are also respectively arranged corresponding to the first jacket, the second jacket, and the third jacket.
[0010] Preferably, the first feed pipe, the second feed pipe, and the third feed pipe are all connected to a feed main pipe; the first discharge pipe, the second discharge pipe, and the third discharge pipe are all connected to a discharge main pipe.
[0011] Preferably, the distillation kettle is further provided with a liquid level sensor, a temperature sensor, and a pressure sensor.
[0012] Preferably, the distillation kettle is further provided with a stirring mechanism, the stirring mechanism comprises a motor arranged at the top of the distillation kettle, the output shaft of the motor is connected to a stirring shaft arranged inside the distillation kettle, and a plurality of stirring blades are evenly distributed on the stirring shaft.
[0013] Preferably, a heat insulation layer is arranged outside the segmented jacket, and heat insulation materials are filled in the heat insulation layer.
[0014] The industrial brine recovery and recycling system for piperylene production provided by the utility model uses a distillation kettle to sequentially heat and distill the brine and then cool and crystallize it. The gas phase distilled out is adsorbed and purified by a packing tower, and finally, purified water that can be directly reused in the production process and by-product sodium chloride that can be directly sold to increase production income are obtained. This solves the problem of brine treatment in the piperylene production process, makes the production more environmentally friendly, does not cause secondary pollution, can recycle the recovered water, reduces the sewage discharge volume and sewage treatment volume, and also reduces the sewage treatment cost.
[0015] The adsorption chamber of the packing tower of this system adopts the mutual cooperation of a vertical chamber formed by structured packing and a spiral chamber formed by dumped packing, which prolongs the flow path of the gas phase, increases the contact time and contact area between the gas phase and the packing, and is beneficial to improving the adsorption rate of impurities and the purity of the purified gas. The heating or cooling jacket of the distillation kettle adopts a segmented design. While improving the heat exchange efficiency, it can also adjust the heat exchange height of the segmented jacket according to the liquid level height of the material in the distillation kettle, and can reduce the usage amount and loss of heat energy or circulating water.
[0016] The operation of this system is simple and convenient, the process conditions are mild, and it is easy to realize large-scale production. While recovering and recycling the brine, it is environmentally friendly. The whole operation route is environmentally friendly and clean. After recycling the wastewater in the brine, each ton of piperylene product can save 3.0t of fresh water, significantly reducing the production cost. Brief Description of the Drawings
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 It is a schematic structural diagram of the industrial brine recovery and recycling system for piperylene production provided by an embodiment of the present utility model;
[0019] Figure 2 It is a schematic structural diagram of the packing tower provided by an embodiment of the present utility model;
[0020] Figure 3 It is a schematic structural diagram of the distillation kettle provided by an embodiment of the present utility model.
[0021] Description of the Reference Numerals:
[0022] 1 - Concentrated brine collection tank, 2 - Distillation kettle, 3 - Packed tower, 4 - Condenser, 5 - Water receiving tank, 6 - Centrifuge, 7 - Dryer, 8 - Packaging machine, 9 - By - product warehouse, 21 - First jacket, 22 - Second jacket, 23 - Third jacket, 24 - Feed main pipe, 25 - Discharge main pipe, 26 - Motor, 27 - Stirring shaft, 28 - Stirring blade, 31 - Gas phase inlet, 32 - Purified gas outlet, 33 - Tower body, 34 - Adsorption chamber, 35 - Vertical chamber, 36 - Spiral chamber, 37 - Partition plate, 211 - First feed pipe, 212 - First discharge pipe, 221 - Second feed pipe, 222 - Second discharge pipe, 231 - Third feed pipe, 232 - Third discharge pipe. Detailed implementation manners
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be described clearly and completely below. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts also belong to the protection scope of the present utility model.
[0024] As Figure 1 and Figure 2 , the industrial concentrated brine recovery and recycling system for piperylene production provided by the present utility model includes: a distillation kettle 2, the material inlet at the top of the distillation kettle 2 is connected to the concentrated brine collection tank 1, and the gas phase outlet at the top of the distillation kettle 2 is connected to the gas phase inlet 31 at the bottom of the packed tower 3; the purified gas outlet 32 at the top of the packed tower 3 is connected to the material inlet of the condenser 4, and the material outlet of the condenser 4 is connected to the inlet of the water receiving tank 5; the outlet of the water receiving tank 5 is connected to the caustic soda preparation process, the water washing process and the circulating water pool through pipelines; the material outlet at the bottom of the distillation kettle 2 is connected to the material inlet of the centrifuge 6, the material outlet of the centrifuge 6 is connected to the inlet of the dryer 7, the outlet of the dryer 7 is connected to the packaging machine 8, and the packaging machine 8 is connected to the by - product warehouse 9.
[0025] The concentrated brine collection tank 1 is used to collect and store all the concentrated brine generated in the production of piperylene, and send the concentrated brine to be treated into the distillation kettle 2 through a pipeline. The concentrated brine is subjected to atmospheric distillation in the distillation kettle 2, and the distillation temperature is set at 100 - 120 °C. The water in the concentrated brine absorbs heat to form a gas phase, which is discharged through the gas phase outlet at the top of the distillation kettle 2, and then enters the packing tower 3. In the gas phase from the distillation kettle 2, in addition to water, it also contains mechanical impurities and / or other material impurities entrained in the production process. During the process of the gas phase rising from the bottom to the top in the packing tower 3, the impurities can be blocked by the packing in the packing tower 3, while the water continues to be discharged without being affected. The gas phase is purified and decontaminated in the packing tower 3, and finally the purified gas is discharged from the packing tower 3 and enters the condenser 4 for condensation. After the purified gas is condensed to 30 - 40 °C in the condenser 4, purified water with a higher purity, meeting the soft water index and a salt content < 200 ppm can be formed. The purified water is sent to the water receiving tank 5 for storage, which is convenient for reuse in the later stage. The purified water recovered from the concentrated brine, due to less impurities, can be directly used to prepare the production alkali solution in the alkali preparation process, for washing the reaction products in the water washing process, and can also be discharged into the circulating water pool as a supplement to the circulating water system for recycling. It can effectively reduce the fresh water usage in the alkali preparation process, water washing process and circulating water pool, effectively save water resources, and also significantly reduce the sewage discharge volume and sewage treatment volume, and reduce the sewage treatment cost and production cost.
[0026] After the distillation in the distillation kettle 2 is completed, the distillation kettle 2 is cooled with circulating water, so that the higher concentration sodium chloride solution in the distillation kettle 2 can be cooled and crystallized. The crystallized material is discharged from the material outlet at the bottom of the distillation kettle 2 into the centrifuge 6. The sodium chloride solid obtained by centrifugation in the centrifuge 6 is then sent to the dryer 7 for drying, and then the by-product sodium chloride can be obtained. After being bagged by the bagging machine 8, it is sent to the by-product warehouse 9 for temporary storage, and can be sold externally in the later stage. The sodium chloride component in the concentrated brine is effectively recovered, the by-product resources are saved, and new economic benefits are created.
[0027] In the existing packing tower 3 with a conventional structure, during the adsorption process, due to the limitation of its own structure, the adsorption packing cannot be in full contact with the gas phase, resulting in low utilization rate. Therefore, in the present utility model, the interior of the packing tower 3 is improved. Specifically, as Figure 2 , the packing tower 3 includes a tower body 33. An adsorption cavity 34 is arranged inside the tower body 33, and both the upper and lower sides of the adsorption cavity 34 are supported by gratings (conventionally arranged, not shown in the drawings); the adsorption cavity 34 is divided into a vertical cavity 35 and a spiral cavity 36 by a cylindrical support frame (conventionally arranged, not shown in the drawings). A spiral partition plate 37 is arranged between the inner wall of the tower body 33 and the vertical cavity 35, and the partition plate 37 makes the gas guiding channel in the spiral cavity 36 in a spiral shape; regular packing is placed in the vertical cavity 35, and random packing is placed in the spiral cavity 36.
[0028] An adsorption cavity 34 is formed by using a grid support, which facilitates the replacement of the adsorption packing. The adsorption cavity 34 is divided by a support frame into a vertically connected vertical cavity 35 and a spiral cavity 36. During the upward flow of the gas phase, part of it flows vertically upward along the vertical cavity 35, and part can flow upward in a spiral shape along the partition plate 37. At the same time, there are usually gaps on the sides of the structured packing, and the gas phase can also exchange between the vertical cavity 35 and the spiral cavity 36, thereby extending the flow path of the gas phase, increasing the contact time and contact area between the gas phase and the packing, and being beneficial to improving the adsorption rate of impurities and the purity of the purified gas.
[0029] Preferably, the structured packing is wire mesh corrugated packing; the random packing is activated carbon packing or resin packing. The structured packing can make the gas phase distribution more uniform, and the random packing can change the gas flow direction, prevent the formation of a stagnant layer at the inner wall of the tower body 33, improve the adsorption efficiency, and the combined use of the two can also improve the operation flexibility of the packed tower 3, and enhance the purification efficiency and purity of the purified gas.
[0030] Such as Figure 3 , preferably, a segmented jacket is arranged outside the distillation kettle 2; the segmented jacket includes a first jacket 21, a second jacket 22 and a third jacket 23 arranged in sequence from top to bottom; a first feed pipe 211, a second feed pipe 221 and a third feed pipe 231 are respectively and correspondingly arranged on the first jacket 21, the second jacket 22 and the third jacket 23; a first discharge pipe 212, a second discharge pipe 222 and a third discharge pipe 232 are respectively and correspondingly arranged on the first jacket 21, the second jacket 22 and the third jacket 23.
[0031] Preferably, the first feed pipe 211, the second feed pipe 221 and the third feed pipe 231 are all connected to the feed main pipe 24; the first discharge pipe 212, the second discharge pipe 222 and the third discharge pipe 232 are all connected to the discharge main pipe 25.
[0032] Feed valves are respectively and correspondingly arranged on the first feed pipe 211, the second feed pipe 221 and the third feed pipe 231. Similarly, discharge valves are respectively and correspondingly arranged on the first discharge pipe 212, the second discharge pipe 222 and the third discharge pipe 232. Through the combined use of the feed valves and the discharge valves, segmented heating or cooling of the first jacket 21, the second jacket 22 and the third jacket 23 can be realized. While improving the heat exchange efficiency, it can also determine whether to introduce the heat exchange medium into the jacket according to the amount of materials in the distillation kettle 2, and can reduce the loss of heat energy or circulating water. The heat exchange medium includes the heating medium in the distillation stage and the cooling medium in the cooling crystallization stage. The heating medium is preferably hot water or steam. Such heating media have a fast heating speed, uniform heating and energy-saving and high efficiency. The cooling medium is preferably circulating water. The heating medium and the cooling medium are from the same source, and mutual switching will not introduce impurities to each other, making the heating distillation and cooling crystallization operations of the distillation kettle 2 more convenient, simple and efficient.
[0033] Preferably, the distillation kettle 2 is also provided with a liquid level sensor, a temperature sensor and a pressure sensor (conventional settings, not shown in the drawings). The multiple sensors in the distillation kettle 2 are mainly used to monitor the liquid level, temperature and pressure of the materials therein in real time, which is convenient for operators to adjust and operate in a timely manner, accurately control the operating parameters of the distillation kettle 2, and can improve the recovery rate and purity of gaseous water and sodium chloride. The liquid level provided by the liquid level sensor therein is also convenient for determining the feeding and discharging conditions of the segmented jacket. For example, when the liquid level of the material is lower than the height of the third jacket 23, the heat exchange medium can be only introduced into the third jacket 23 to reduce the usage and loss of the medium, so as to realize the operation of adjusting the heat exchange height of the segmented jacket according to the liquid level height.
[0034] Such as Figure 3 , preferably, the distillation kettle 2 is also provided with a stirring mechanism. The stirring mechanism includes a motor 26 arranged at the top of the distillation kettle 2. The output shaft of the motor 26 is connected to a stirring shaft 27 arranged inside the distillation kettle 2, and a plurality of stirring blades 28 are evenly distributed on the stirring shaft 27. The stirring mechanism is arranged in the distillation kettle 2, and the motor 26 is used to drive the stirring shaft 27 to rotate, so as to facilitate the stirring blades 28 to stir and turn the materials in the distillation kettle 2, intensify the mixing degree between the materials, and accelerate the heat exchange efficiency between the materials both during heating and distillation and during cooling and crystallization. The stirring blade 28 is a conventional structure in the art and is not specially limited herein.
[0035] Preferably, a heat preservation layer (conventional setting, not shown in the drawings) is arranged outside the segmented jacket, and the heat preservation layer is filled with heat preservation materials. The heat preservation materials are commonly used rock wool, polyurethane foam, glass wool, etc. in the art and are not specially limited herein. The heat preservation layer uses the heat insulation performance of the heat preservation materials to insulate the segmented jacket and the distillation kettle 2, so that the materials in the distillation kettle 2 are heated or cooled sufficiently without being affected by the external environment, and the working efficiency is improved.
[0036] When the industrial concentrated brine recovery and recycling system for the production of piperylene of the present utility model works specifically, the concentrated brine in the concentrated brine collecting tank 1 is sent into the distillation kettle 2 through a pipeline. According to the liquid level of the materials in the distillation kettle 2, the heating medium is injected into the corresponding segmented jacket through the corresponding feed pipe and discharge pipe to heat the materials in the distillation kettle 2, and the distillation temperature is set to 100-120 °C. At the same time, the motor 26 at the top of the distillation kettle 2 is started, and the motor 26 is used to drive the stirring shaft 27 to rotate, so as to facilitate the stirring blades 28 to stir and turn the materials in the distillation kettle 2, accelerate the heat exchange efficiency between the materials, and also improve the distillation efficiency.
[0037] The water in the brine absorbs heat to form a gas phase. The distilled gas phase is discharged through the gas phase outlet at the top of the distillation kettle 2 and then enters the packing tower 3. Part of the gas phase flows vertically upward along the vertical cavity 35, and part of the gas phase can flow upward in a spiral shape along the partition plate 37. At the same time, the gas phase can also exchange with each other in the vertical cavity 35 and the spiral cavity 36, increasing the contact time and contact area between the gas phase and the packing. The packing is used to block and remove the impurities entrained in the gas phase, and the water continues to be discharged from the packing tower 3 without being affected and enters the condenser 4 for condensation. After the purified gas from the packing tower 3 is condensed to 30 - 40 °C in the condenser 4, purified water with a salt content < 200 ppm can be formed. The purified water is sent to the water receiving tank 5 for storage, and it can be directly used to prepare the production alkali solution in the alkali preparation process, wash the reaction products in the water washing process, and can also be discharged into the circulating water pool as makeup water for the circulating water system for recycling.
[0038] After the distillation in the distillation kettle 2 is completed, according to the material liquid level in the distillation kettle 2, cooling medium circulating water is injected into the corresponding segmented jacket to start cooling the distillation kettle 2, so that the higher-concentration sodium chloride solution in the distillation kettle 2 can be cooled and crystallized. The crystallized material is discharged from the material outlet at the bottom of the distillation kettle 2 into the centrifuge 6. The sodium chloride solid obtained by centrifugation in the centrifuge 6 is then sent to the dryer 7 for drying, and the by-product sodium chloride can be obtained. After being bagged by the bagging machine 8, it is sent to the by-product warehouse 9 for temporary storage and can be sold externally later.
[0039] It should be noted that in the present utility model, the detailed structures of some devices are not described in detail, but they belong to the prior art known to those skilled in the art, so they will not be elaborated here. In addition, the parts not involved in this device are the same as or can be implemented by the prior art.
[0040] It should be noted that pressure sensors, flow meters or temperature sensors are provided on the conveying pipelines inside the system between different units or devices and equipment, and different valves are also provided, such as pressure relief valves, pressure regulating valves, safety valves, etc., which are used to adjust and stabilize the pressure of the entire system.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model.
Claims
1. An industrial concentrated brine recovery and recycling system for the production of piperylene, characterized in that, Including: A distillation kettle, the material inlet at the top of the distillation kettle is connected to a concentrated brine collection tank, and the gas-phase outlet at the top of the distillation kettle is connected to the gas-phase inlet at the bottom of a packed tower; the purified gas outlet at the top of the packed tower is connected to the material inlet of a condenser, and the material outlet of the condenser is connected to the inlet of a water receiving tank; the outlet of the water receiving tank is connected to an alkali preparation process, a water washing process, and a circulating water tank through pipelines respectively; the material outlet at the bottom of the distillation kettle is connected to the material inlet of a centrifuge, the material outlet of the centrifuge is connected to the inlet of a dryer, the outlet of the dryer is connected to a packaging machine, and the packaging machine is connected to a by-product warehouse.
2. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 1, is characterized in that, The packed tower includes a tower body, an adsorption chamber is arranged inside the tower body, and both the upper and lower sides of the adsorption chamber are supported by grids; the adsorption chamber is divided into a vertical chamber and a spiral chamber by a cylindrical support frame, and a spiral partition plate is arranged between the inner wall of the tower body and the vertical chamber, and the partition plate makes the gas guiding channel in the spiral chamber be spiral; structured packing is placed in the vertical chamber, and random packing is placed in the spiral chamber.
3. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 2, is characterized in that, The structured packing is wire mesh corrugated packing; the random packing is activated carbon packing or resin packing.
4. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to any one of claims 1-3, is characterized in that, A segmented jacket is arranged outside the distillation kettle; the segmented jacket includes a first jacket, a second jacket, and a third jacket arranged in sequence from top to bottom; a first feed pipe, a second feed pipe, and a third feed pipe are respectively and correspondingly arranged on the first jacket, the second jacket, and the third jacket; a first discharge pipe, a second discharge pipe, and a third discharge pipe are also respectively and correspondingly arranged on the first jacket, the second jacket, and the third jacket.
5. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 4, is characterized in that The first feed pipe, the second feed pipe, and the third feed pipe are all connected to a feed main pipe; the first discharge pipe, the second discharge pipe, and the third discharge pipe are all connected to a discharge main pipe.
6. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 4, is characterized in that, The distillation kettle is also provided with a liquid level sensor, a temperature sensor, and a pressure sensor.
7. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 4, is characterized in that, The distillation kettle is also provided with a stirring mechanism, the stirring mechanism includes a motor arranged at the top of the distillation kettle, the output shaft of the motor is connected to a stirring shaft arranged inside the distillation kettle, and a plurality of stirring blades are evenly distributed on the stirring shaft.
8. The recovery and recycling system for industrial concentrated brine used in the production of piperylene, according to claim 4, is characterized in that, A heat preservation layer is arranged outside the segmented jacket, and the heat preservation layer is filled with heat preservation materials.