Condensate water recovery device of catalyst preparation system
By designing a condensate recovery device in the catalyst formulation system to collect and recover condensate at different temperatures, the problems of equipment water accumulation and energy waste are solved, the effective utilization of condensate and secondary steam is achieved, and the quality of catalyst and energy utilization are improved.
Patent Information
- Application Number
- CN202422583860.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-10-25
AI Technical Summary
During the catalyst preparation process, the condensate water flows to the synthesis section long pipelines, resulting in large transport resistance and water accumulation in equipment, affecting temperature stability and catalyst quality. At the same time, the direct discharge of condensate water leads to energy waste and equipment corrosion.
A condensate recovery device for a catalyst preparation system is designed, including a condensate recovery tank, which collects low-temperature and high-temperature high-pressure condensate through different inlets, and controls the frequency of the delivery pump with a remote level meter and controller to ensure the stability of the liquid level, reduce the generation of secondary steam, and recover the condensed water to the synthesis section, and the secondary steam is transported to the reboiler for use.
It solves the problem of water accumulation in the equipment, avoids equipment corrosion, improves energy utilization, and ensures the temperature stability and quality of the catalyst preparation process.
Smart Images
Figure CN223283474U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of condensed water recovery, and in particular relates to a condensed water recovery device for a catalyst preparation system. Background Art
[0002] Polyvinyl alcohol (PVA), an important chemical raw material, is widely used in industries such as industry, agriculture, fisheries, transportation, and medicine. The production process of PVA includes synthesis, distillation, polymerization, and alcoholysis. The synthesis stage uses acetylene and acetic acid as raw materials to produce vinyl acetate. The polymerization stage involves the polymerization of vinyl acetate under certain conditions to produce polyvinyl acetate. The alcoholysis stage involves the alcoholysis of polyvinyl acetate to produce polyvinyl alcohol.
[0003] Catalyst is another name for catalyst. Zinc acetate is a catalyst used in the vinyl acetate synthesis process. Acetylene and acetic acid are synthesized into vinyl acetate under the catalysis of zinc acetate. Currently, the catalysts used for synthesizing vinyl acetate in the PVA industry are all prepared by spraying. When preparing the catalyst containing zinc acetate, first prepare the zinc acetate solution in the zinc acetate dissolution tank, and then pump the zinc acetate solution into the drying tower. The drying tower is filled with activated carbon. By passing hot air into the drying tower, the activated carbon is suspended. The zinc acetate solution enters the drying tower and is sprayed on the activated carbon, drying the activated carbon and evaporating the water adsorbed by the activated carbon. Finally, the catalyst containing zinc acetate is obtained. The zinc acetate dissolution tank needs to be heated by water vapor to dissolve the zinc acetate. Water vapor is passed into the jacket of the zinc acetate dissolution tank for heating. Water vapor is passed into the drying tower for heating to maintain the temperature required for preparing the catalyst. At the same time, water vapor also needs to be passed into the drying tower for heating when the activated carbon is dried. Therefore, a large amount of steam condensate is generated during the catalyst preparation process.
[0004] Temperature control at various points in the drying tower is crucial during the catalyst preparation process, as temperature stability at each point directly impacts catalyst quality. The hydrophobicity of the steam condensate system directly impacts the temperature at each point in the catalyst drying system. Currently, the condensate generated during the catalyst preparation process flows through pipes to the condensate recovery tank in the synthesis section. Due to the long distance between the catalyst preparation system and the condensate recovery tank in the synthesis section, the condensate transport pipes are long, increasing the resistance to condensate transport and causing water accumulation in the equipment. To stabilize the temperature at each point in the catalyst preparation process, a portion of the condensate must be discharged to the drain. Failure to discharge the condensate will cause water accumulation in equipment such as the drying tower, affecting the temperature at each point in the catalyst drying tower and, consequently, the catalyst quality. Directly discharging steam condensate into the drain indoors generates secondary steam, which increases water vapor levels in the catalyst preparation workshop, accelerates equipment corrosion, and wastes energy. Utility Model Content
[0005] In response to the problems existing in the prior art, the utility model provides a condensate recovery device for a catalyst preparation system, which recovers the condensate generated during the catalyst preparation process and then transports it to the synthesis section. At the same time, the secondary steam generated is recycled to reduce equipment corrosion.
[0006] The technical solutions adopted in this utility model are as follows:
[0007] A condensate recovery device for a catalyst preparation system includes a condensate recovery tank for temporarily storing condensate, a first liquid inlet and a second liquid inlet are provided on the tank body of the condensate recovery tank, the second liquid inlet is arranged below the first liquid inlet, the first liquid inlet is connected to a low-temperature, low-pressure condensate input pipeline, the second liquid inlet is connected to a high-temperature, high-pressure condensate input pipeline, the condensate output pipeline of the condensate recovery tank is connected to a condensate delivery main pipe of a synthesis section, a secondary steam outlet is provided on the top of the condensate recovery tank, the secondary steam outlet is connected to the secondary steam output pipeline, and the other end of the secondary steam output pipeline is connected to a reboiler of the synthesis section.
[0008] Furthermore, the second liquid inlet is arranged near the bottom of the condensate recovery tank. During use, the second liquid inlet is below the liquid level of the condensate.
[0009] Furthermore, the high-temperature and high-pressure condensate water input pipe extends to the interior of the condensate water recovery tank and bends downward, which is conducive to the liquid outlet of the high-temperature and high-pressure condensate water input pipe being located below the condensate liquid level. The low-temperature condensate stored in the condensate water recovery tank cools the high-temperature condensate entering through the high-temperature and high-pressure condensate water input pipe, thereby reducing the generation of secondary steam.
[0010] Furthermore, a condensate outlet is provided at the bottom of the condensate recovery tank, which is connected to one end of a condensate output pipe, and the other end of the condensate output pipe is connected to the condensate delivery main pipe of the synthesis section.
[0011] Furthermore, the condensate output pipeline is provided with a valve for controlling the output of condensate, a filter for removing impurities in condensate, a delivery pump for providing power to the condensate, and a check valve for preventing the backflow of condensate in sequence along the delivery direction of the condensate. The delivery pump is a variable frequency pump, which is connected to the output end of the controller. The controller performs variable frequency control on the delivery pump to speed up or slow down the output of the condensate in the condensate recovery tank. For example, the liquid level in the condensate recovery tank is set to 30%-40% of the tank height, thereby ensuring that the second liquid inlet is located below the condensate liquid level.
[0012] Furthermore, a remote level gauge and a pressure sensor are provided in the condensate recovery tank, and both the remote level gauge and the pressure sensor are connected to the input end of the controller. The remote level gauge monitors the liquid level height in the condensate recovery tank. When the liquid level height in the condensate recovery tank is higher than the preset value, the controller interlocks and controls the delivery pump, increases the frequency of the delivery pump, and speeds up the condensate output speed in the condensate recovery tank. When the liquid level height in the condensate recovery tank is lower than the preset value, reverse adjustment is performed to slow down the condensate output speed in the condensate recovery tank, thereby maintaining the liquid level in the condensate recovery tank at the preset height, ensuring that the outlet of the high-temperature and high-pressure condensate input pipe is below the liquid surface of the condensate.
[0013] Furthermore, a pressure relief valve is provided on the top of the condensate recovery tank, which is connected to the output end of the controller for stabilizing the pressure in the condensate recovery tank. When the pressure sensor detects that the pressure in the condensate recovery tank exceeds the threshold, the controller interlocks and opens the pressure relief valve until the normal pressure is reached, and then closes the pressure relief valve.
[0014] Furthermore, the controller is a programmable logic controller having storage, calculation and control functions, and is used for receiving, processing and outputting data to implement central control, for example, it may be a DCS controller.
[0015] Furthermore, the condensate inlet of the low-temperature and low-pressure condensate input pipe is connected to the jacket of the zinc acetate dissolution tank, and the high-temperature steam enters the zinc acetate dissolution tank. The steam condenses after heat exchange in the zinc acetate dissolution tank to form low-temperature and low-pressure condensate. The condensate temperature can be, for example, 80-90°C, and the pressure can be, for example, 0.1-0.2MPa. The low-temperature and low-pressure condensate enters the condensate recovery tank through the first liquid inlet, and the secondary steam generated by the condensed water enters the secondary steam output pipe through the secondary steam outlet. The secondary steam is transported to the reboiler of the synthesis section for recycling.
[0016] Furthermore, a high-temperature and high-pressure condensate input pipeline is formed by the confluence of a drying tower condensate delivery pipeline and an air preheater condensate delivery pipeline. The high-temperature steam enters the drying tower and the air preheater, and the steam condenses after heat exchange inside the drying tower and the air preheater to form high-temperature and high-pressure condensate. The condensate temperature can be, for example, 90-105°C, and the pressure can be, for example, 0.15-0.25MPa. The high-temperature and high-pressure condensate enters the condensate recovery tank through the second liquid inlet. Since the second liquid inlet is arranged below the condensate liquid level, the high-temperature and high-pressure condensate entering the condensate recovery tank contacts the low-temperature condensate in the condensate recovery tank, thereby lowering the temperature of the high-temperature and high-pressure condensate and reducing the secondary steam released by the high-temperature and high-pressure condensate. At the same time, the small amount of steam carried by the high-temperature and high-pressure condensate is cooled by the low-temperature condensate in the condensate recovery tank, thereby recovering the heat of the condensate to the greatest extent.
[0017] Furthermore, the drying tower condensate delivery pipeline, the air preheater condensate delivery pipeline and the low-temperature and low-pressure condensate input pipeline are all equipped with steam traps to output the condensate in a timely manner.
[0018] Furthermore, the condensate recovery tank is set at a height lower than the zinc acetate dissolution tank, drying tower and air preheater, which is conducive to the condensate in the zinc acetate dissolution tank, drying tower and air preheater flowing into the condensate recovery tank under the action of gravity.
[0019] Beneficial effects of the utility model:
[0020] The utility model discloses a condensate recovery device for a catalyst preparation system. A condensate recovery tank is provided to collect condensate from the catalyst preparation system to avoid water accumulation in the equipment. A first liquid inlet and a second liquid inlet are provided. The second liquid inlet is provided below the first liquid inlet. Low-temperature and low-pressure condensate enters the condensate recovery tank through the first liquid inlet, and high-temperature and high-pressure condensate enters the condensate recovery tank through the second liquid inlet. The second liquid inlet is located below the condensate liquid level. Condensate of different temperatures and pressures enters the condensate recovery tank in different ways, thereby realizing the recovery of condensate and secondary steam. The condensate is recovered to the maximum extent possible by utilizing a remote level gauge installed in the condensate recovery tank and a delivery pump on the condensate output pipe. The remote level gauge monitors the liquid level in the condensate recovery tank and transmits the data to a controller. The controller controls the frequency of the delivery pump to maintain the liquid level in the condensate recovery tank at a preset height, ensuring that the outlet of the high-temperature and high-pressure condensate input pipe is below the condensate surface. The condensate in the condensate recovery tank is returned to the synthesis section, and the secondary steam is delivered to the reboiler in the synthesis section, thereby recycling the condensate and the secondary steam. The utility model relates to a condensate recovery device for a catalyst preparation system, which solves the problem of water accumulation in the catalyst preparation system, while preventing steam from corroding the equipment and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 This is a schematic diagram of a condensate recovery device for a catalyst preparation system of the present invention.
[0022] Reference numerals:
[0023] 1-Condensate recovery tank; 2-Low-temperature and low-pressure condensate input pipeline; 3-High-temperature and high-pressure condensate input pipeline; 4-Condensate output pipeline; 5-Secondary steam output pipeline; 6-Valve; 7-Filter; 8-Discharge pump; 9-Check valve; 10-Controller; 11-Remote level gauge; 12-Pressure sensor; 13-Pressure relief valve; 14-Zinc acetate dissolution tank; 15-Drying tower condensate delivery pipeline; 16-Air preheater condensate delivery pipeline; 17-Air preheater; 18-Air compressor; 19-Drying tower; 20-Steam trap. DETAILED DESCRIPTION
[0024] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0025] like Figure 1 As shown, the utility model provides a condensate recovery device for a catalyst preparation system, which includes a condensate recovery tank 1 for temporarily storing condensate, and a first liquid inlet and a second liquid inlet are provided on the tank body of the condensate recovery tank 1, the second liquid inlet is arranged below the first liquid inlet, the first liquid inlet is connected to the low-temperature and low-pressure condensate input pipe 2, the second liquid inlet is connected to the high-temperature and high-pressure condensate input pipe 3, the condensate output pipe 4 of the condensate recovery tank 1 is connected to the condensate delivery main pipe of the synthesis section, and a secondary steam outlet is provided on the top of the condensate recovery tank 1, the secondary steam outlet is connected to the secondary steam output pipe 5, and the other end of the secondary steam output pipe 5 is connected to the reboiler of the synthesis section.
[0026] The second liquid inlet is arranged near the bottom of the condensed water recovery tank 1. During use, the second liquid inlet is below the liquid level of the condensed water.
[0027] The high-temperature and high-pressure condensed water input pipe 3 extends to the inside of the condensed water recovery tank 1 and bends downward, which is conducive to the liquid outlet of the high-temperature and high-pressure condensed water input pipe 3 being located below the condensed water liquid level. The low-temperature condensed water stored in the condensed water recovery tank 1 cools the high-temperature condensed water entering through the high-temperature and high-pressure condensed water input pipe 3, thereby reducing the generation of secondary steam.
[0028] A condensate outlet is provided at the bottom of the condensate recovery tank 1 , which is connected to one end of a condensate output pipe 4 , and the other end of the condensate output pipe 4 is connected to the condensate delivery main pipe of the synthesis section.
[0029] The condensate output pipe 4 is provided with a valve 6 for controlling the output of condensate, a filter 7 for removing impurities in the condensate, a delivery pump 8 for providing power to the condensate, and a check valve 9 for preventing the backflow of condensate in sequence along the delivery direction of the condensate. The delivery pump 8 is a variable frequency pump, and the delivery pump 8 is connected to the output end of the controller 10. The controller 10 performs variable frequency control on the delivery pump 8 to speed up or slow down the output of the condensate inside the condensate recovery tank 1. For example, the liquid level in the condensate recovery tank 1 is set to 30%-40% of the tank body height to ensure that the second liquid inlet is located below the condensate liquid level.
[0030] A remote level gauge 11 and a pressure sensor 12 are provided in the condensate recovery tank 1. The remote level gauge 11 and the pressure sensor 12 are both connected to the input end of the controller 10. The remote level gauge 11 monitors the liquid level height in the condensate recovery tank 1. When the liquid level height in the condensate recovery tank 1 is higher than the preset value, the controller 10 interlocks and controls the delivery pump 8, increases the frequency of the delivery pump 8, and speeds up the condensate output speed in the condensate recovery tank 1. When the liquid level height in the condensate recovery tank 1 is lower than the preset value, reverse adjustment is performed to slow down the condensate output speed in the condensate recovery tank 1, thereby maintaining the liquid level in the condensate recovery tank 1 at the preset height, ensuring that the outlet of the high-temperature and high-pressure condensate input pipe 3 is below the liquid surface of the condensate.
[0031] A pressure relief valve 13 is provided at the top of the condensate recovery tank 1. The pressure relief valve 13 is connected to the output end of the controller 10 and is used to stabilize the pressure inside the condensate recovery tank 1. When the pressure sensor 12 detects that the pressure inside the condensate recovery tank 1 exceeds the threshold, the controller 10 interlocks and opens the pressure relief valve 13 until the normal pressure is reached, and then closes the pressure relief valve 13.
[0032] The controller 10 is a programmable logic controller having storage, calculation and control functions, and is used for receiving, processing and outputting data to implement central control, for example, it may be a DCS controller.
[0033] The condensate inlet of the low-temperature and low-pressure condensate input pipe 2 is connected to the jacket of the zinc acetate dissolution tank 14, and the high-temperature steam enters the zinc acetate dissolution tank 14. The steam condenses after heat exchange in the zinc acetate dissolution tank 14 to form low-temperature and low-pressure condensate. The condensate temperature can be, for example, 80-90°C, and the pressure can be, for example, 0.1-0.2MPa. The low-temperature and low-pressure condensate enters the condensate recovery tank 1 through the first liquid inlet, and the secondary steam generated by the condensed water enters the secondary steam output pipe 5 through the secondary steam outlet. The secondary steam is transported to the reboiler of the synthesis section for recycling.
[0034] The high-temperature and high-pressure condensed water input pipeline 3 is formed by the confluence of the drying tower condensed water delivery pipeline 15 and the air preheater condensed water delivery pipeline 16. The high-temperature steam enters the drying tower 19 and the air preheater 17. The steam condenses after heat exchange inside the drying tower 19 and the air preheater 17 to form high-temperature and high-pressure condensed water. The condensed water temperature can be, for example, 90-105°C, and the pressure can be, for example, 0.15-0.25MPa. The high-temperature and high-pressure condensed water enters the condensed water recovery tank 1 through the second liquid inlet. Since the second liquid inlet is arranged below the condensed water liquid level, the high-temperature and high-pressure condensed water entering the condensed water recovery tank 1 contacts the low-temperature condensed water in the condensed water recovery tank 1, thereby lowering the temperature of the high-temperature and high-pressure condensed water and reducing the secondary steam released by the high-temperature and high-pressure condensed water. At the same time, the small amount of steam carried by the high-temperature and high-pressure condensed water is cooled by the low-temperature condensed water in the condensed water recovery tank 1, thereby recovering the heat of the condensed water to the greatest extent.
[0035] The drying tower condensate delivery pipeline 15, the air preheater condensate delivery pipeline 16 and the low-temperature and low-pressure condensate input pipeline 2 are all provided with steam traps 20 to output the condensate in time.
[0036] The condensate recovery tank 1 is set at a height lower than the zinc acetate dissolution tank 14, the drying tower 19 and the air preheater 17, that is, the top plane of the condensate recovery tank 1 is located below the bottom horizontal plane of the zinc acetate dissolution tank 14, the drying tower 19 and the air preheater 17, which is conducive to the steam condensate formed in the zinc acetate dissolution tank 14, the drying tower 19 and the air preheater 17 to flow into the condensate recovery tank 1 under the action of gravity. Example
[0037] like Figure 1 As shown, the catalyst preparation system includes a zinc acetate dissolving tank 14, an air compressor 18, an air preheater 17, and a drying tower 19. The zinc acetate dissolving tank 14 is heated by a steam jacket to dissolve zinc acetate in water. The air compressor 18 inputs air into the air preheater 17. The air preheater 17 uses steam to heat the air to make it high-temperature air. The high-temperature air is transported to the drying tower 19. The drying tower 19 is used to carry activated carbon. The drying tower 19 is a place for adsorbing zinc acetate and drying it.
[0038] The catalyst preparation process includes: heating the zinc acetate dissolving tank 14 with steam at a steam pressure of 0.4 MPa and a temperature of 225°C, dissolving zinc acetate in water at a weight ratio of zinc acetate to water of 1:18, adding 1200 kg of activated carbon into the drying tower 19, starting the air compressor 18, blowing air into the drying tower at a pressure of 0.025 MPa, so that the activated carbon in the drying tower 19 is in a suspended state; passing steam into the air preheater 17 and the drying tower 19 for heating, and the steam pressure entering the drying tower 19 is 0.4 MPa. a. The temperature is 225°C. Steam enters the drying tower 19 in two ways, one from the middle of the drying tower and the other from the bottom of the drying tower. The steam pressure entering the air preheater 17 is 0.4 MPa and the temperature is 225°C. When the temperature of the drying tower reaches 130-140°C, the solution in the zinc acetate dissolving tank 14 is pumped into the drying tower 19 and sprayed on the activated carbon. After the zinc acetate solution is sprayed, the temperature of the drying tower 19 is controlled at 130-140°C to dry the activated carbon therein and evaporate the moisture adsorbed by the activated carbon.
[0039] The condensed water with a temperature of about 85°C and 0.1MPa outputted from the zinc acetate dissolving tank 14 flows by gravity into the condensed water recovery tank 1 through the low-temperature and low-pressure condensed water input pipe 2. The volume of the condensed water recovery tank is 1.5m³ and the height is 0.5m. After the low-temperature and low-pressure condensed water enters the condensed water recovery tank 1, secondary steam will be generated due to the pressure drop. The temperature of the secondary steam is about 107°C and the pressure is 0.2MPa. The generated secondary steam is transported to the reboiler of the synthesis section through the secondary steam output pipe 5. The condensed water with a temperature of about 98°C and 0.2MPa outputted from the drying tower and the condensed water with a temperature of about 98°C and 0.2MPa outputted from the air preheater 17 are merged into the high-temperature and high-pressure condensed water input pipe 3 and transported by gravity to the condensed water recovery tank 1. The condensed water in the condensed water recovery tank 1 (with a temperature of about 90°C) is transported by gravity through the condensed water output pipe 5. Pipeline 4 returns to the synthesis section, and the diameter of the condensate output pipe 4 is DN50. The liquid level in the condensate recovery tank 1 is set to 35-40% of the tank height. When the liquid level in the condensate recovery tank 1 is higher than 40%, the controller 10 interlocks and controls the delivery pump 8, increases the frequency of the delivery pump 8 to 40Hz, and speeds up the condensate output speed in the condensate recovery tank 1. When the liquid level in the condensate recovery tank 1 is lower than 35%, reverse adjustment is performed to adjust the frequency of the delivery pump 8 to 0-5Hz, slowing down the condensate output speed in the condensate recovery tank 1. The pressure threshold inside the condensate recovery tank 1 is set to 0.25MPa. When the pressure sensor 12 detects that the pressure in the condensate recovery tank 1 exceeds the threshold, the controller 10 interlocks and opens the pressure relief valve 13 until the normal pressure is reached, and then closes the pressure relief valve 13.
[0040] The above describes preferred embodiments of the present invention. However, the above description is not intended to be limiting. Those skilled in the art may make numerous changes or modifications to the present invention without departing from the spirit and scope of the present invention. Such changes or modifications are intended to fall within the scope of the appended claims.
Claims
1. A condensate recovery device for a catalyst preparation system, characterized in that: The invention comprises a condensate recovery tank (1) for temporarily storing condensate, wherein a first liquid inlet and a second liquid inlet are provided on the tank body of the condensate recovery tank (1), the second liquid inlet is arranged below the first liquid inlet, the first liquid inlet is connected to a low-temperature, low-pressure condensate input pipe (2), the second liquid inlet is connected to a high-temperature, high-pressure condensate input pipe (3), the condensate output pipe (4) of the condensate recovery tank (1) is connected to a condensate transport main pipe of a synthesis section, a secondary steam outlet is provided at the top of the condensate recovery tank (1), the secondary steam outlet is connected to a secondary steam output pipe (5), and the other end of the secondary steam output pipe (5) is connected to a reboiler of the synthesis section.
2. The condensed water recovery device for the catalyst preparation system according to claim 1, characterized in that: The second liquid inlet is arranged near the bottom of the condensed water recovery tank (1).
3. The condensed water recovery device for the catalyst preparation system according to claim 1 or 2, characterized in that: The high-temperature and high-pressure condensed water input pipe (3) extends into the interior of the condensed water recovery tank (1) and bends downward.
4. The condensed water recovery device for the catalyst preparation system according to claim 1, characterized in that: A condensate outlet is provided at the bottom of the condensate recovery tank (1), and the condensate outlet is connected to one end of a condensate output pipe (4), and the other end of the condensate output pipe (4) is connected to the condensate delivery main pipe of the synthesis section.
5. The condensed water recovery device for the catalyst preparation system according to claim 4, characterized in that: A valve (6) for controlling the output of condensed water, a filter (7) for removing impurities from the condensed water, a delivery pump (8) for providing power to the condensed water, and a check valve (9) for preventing the backflow of the condensed water are sequentially provided on the condensed water output pipe (4) along the delivery direction of the condensed water. The delivery pump (8) is a variable frequency pump. The delivery pump (8) is connected to the output end of the controller (10). The controller (10) performs variable frequency control on the delivery pump (8).
6. The condensed water recovery device for the catalyst preparation system according to claim 1, characterized in that: A remote level gauge (11) and a pressure sensor (12) are provided in the condensed water recovery tank (1), and both the remote level gauge (11) and the pressure sensor (12) are connected to the input end of the controller (10).
7. The condensed water recovery device for the catalyst preparation system according to claim 6, characterized in that: A pressure relief valve (13) is provided on the top of the condensed water recovery tank (1), and the pressure relief valve (13) is connected to the output end of the controller (10).
8. The condensed water recovery device for the catalyst preparation system according to claim 7, characterized in that: The controller (10) is a programmable logic controller.
9. The condensed water recovery device for the catalyst preparation system according to claim 1, characterized in that: The condensate inlet of the low-temperature and low-pressure condensate input pipe (2) is connected to the jacket of the zinc acetate dissolution tank (14), and the high-temperature and high-pressure condensate input pipe (3) is formed by the merging of the drying tower condensate delivery pipe (15) and the air preheater condensate delivery pipe (16).
10. The condensed water recovery device for the catalyst preparation system according to claim 9, characterized in that: The drying tower condensate water delivery pipeline (15), the air preheater condensate water delivery pipeline (16) and the low-temperature and low-pressure condensate water input pipeline (2) are all provided with steam traps (20).