Organic peroxide waste acid recovery device

Abstract

The utility model relates to the technical field of organic peroxide waste acid recovery, and discloses an organic peroxide waste acid recovery device which comprises a waste acid collection unit, a pretreatment unit, a separation unit, an oxidation reduction treatment unit, a concentration and refining unit and a control unit. The waste acid feeding pipe, the filtering assembly and the cooler are sequentially communicated through a pipeline, a plurality of layers of filter screens with different pore diameters are arranged in the filtering assembly and are used for removing solid impurities and part of macromolecular organic matters in waste acid, the cooler adopts a jacket type structure, and the waste acid is cooled to a proper temperature through circulating cooling liquid. According to the organic peroxide waste acid recovery device, the requirements of high purity, good quality, efficient recovery and reuse of organic chemical raw materials in waste acid are realized, and the development requirements of circular economy, energy conservation and emission reduction are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of organic peroxide waste acid recovery, in particular to an organic peroxide waste acid recovery device. BACKGROUND

[0002] In the production process of organic peroxide, a large amount of waste acid is often generated. These waste acids not only contain corrosive acidic components, but also have certain danger and complexity due to the presence of organic peroxide. If they are directly discharged without treatment, they will cause serious environmental pollution, such as soil acidification and water pollution, and also cause waste of resources. The existing waste acid recovery device cannot effectively treat the characteristics of organic peroxide waste acid, has low treatment efficiency, low purity of recovered acid, cannot effectively remove organic impurities, has great safety hazards, and cannot effectively recover and utilize the waste acid. CONTENT OF THE UTILITY MODEL

[0003] In view of the defects of the prior art, the present application provides an organic peroxide waste acid recovery device, which has the advantages of efficient recovery of organic chemical raw materials in waste acid, and solves the problem of ineffective recovery and utilization of waste acid.

[0004] To achieve the above purpose, the present application provides the following technical scheme: an organic peroxide waste acid recovery device, comprising a waste acid collecting unit, a pretreatment unit, a separation unit, a redox treatment unit, a concentration and refining unit, and a control unit, the pretreatment unit comprises a waste acid feeding pipe, a filter assembly and a cooler, the waste acid feeding pipe, the filter assembly and the cooler are sequentially communicated through pipelines, the filter assembly is internally provided with multiple layers of filter screens with different pore sizes for removing solid impurities and part of macromolecular organic matters in the waste acid, and the cooler adopts a jacketed structure and cools the waste acid to a suitable temperature through circulating cooling liquid.

[0005] The waste acid collecting unit is used for collecting the waste acid generated in the production process; the pretreatment unit is used for adjusting the temperature and pH value of the waste acid to adapt to the subsequent treatment; the separation recovery system is used for separating the useful chemical substances in the waste acid by distillation and other methods; and the control system is used for monitoring the entire recovery process to ensure the safety and efficiency of the operation. The waste acid enters the filter assembly through the feeding pipe, the filter assembly is internally provided with multiple layers of filter screens with different pore sizes, which can effectively remove the solid impurities and part of macromolecular organic matters in the waste acid. The filtered waste acid enters the cooler, the cooler adopts a jacketed structure, and the waste acid is cooled to a suitable temperature through circulating cooling liquid, which reduces the activity of organic peroxide and reduces the possibility of decomposition, thereby improving the safety of subsequent treatment.

[0006] The separation unit comprises a centrifugal separator and a liquid separation funnel, the centrifugal separator separates the organic phase and the acid phase in the waste acid, and the liquid separation funnel is used for static separation of the mixed liquid after separation.

[0007] After pretreatment, the waste acid enters the centrifugal separator, and under high-speed rotation, the organic phase and the acid phase in the waste acid are further separated due to the difference in density. The mixed liquid after centrifugal separation enters the liquid separation funnel for static separation, and the lower layer of waste acid and the upper layer of organic phase can be better separated, and the separated organic phase can be separately treated or recycled.

[0008] The oxidation-reduction treatment unit comprises an oxidation reactor and a reduction reactor, the oxidation reactor is connected with an oxidizing agent for decomposing the residual organic matter oxidant in the waste acid, and the reduction reactor is connected with a reducing agent for reducing the high-valence oxidizing impurities possibly existing in the waste acid, and the oxidation reactor and the reduction reactor are both provided with stirring devices;

[0009] The waste acid flowing out of the liquid separation funnel enters the oxidation reactor, and by introducing an appropriate amount of oxidizing agent into the oxidation reactor, a small amount of residual organic matter in the waste acid can be oxidized and decomposed into harmless substances such as carbon dioxide and water. After oxidation treatment, the waste acid enters the reduction reactor, and a suitable reducing agent is added to reduce the high-valence oxidizing impurities possibly existing in the waste acid, so as to ensure the purity of the recovered acid. The oxidation reactor and the reduction reactor are both provided with stirring devices, so that the reaction can be fully carried out.

[0010] The concentration and refining unit comprises an evaporation concentrator and an ion exchange column, the evaporation concentrator is provided with a temperature and pressure control system inside, the water in the waste acid is removed by heating evaporation, and the ion exchange column is filled with ion exchange resin for removing impurities in the waste acid.

[0011] After oxidation-reduction treatment, the waste acid enters the evaporation concentrator, and the water in the waste acid is removed by heating evaporation to increase the concentration of the acid. The evaporation concentrator is provided with a temperature and pressure control system to ensure the safety and stability of operation. The concentrated acid liquid then passes through the ion exchange column, which is filled with ion exchange resin specially used for removing impurity ions in the waste acid, which can further improve the purity of the recovered acid and obtain reusable high-purity acid.

[0012] Preferably, the control unit comprises temperature sensors, pressure sensors, liquid level sensors and gas detection alarms, and the control unit is distributed at key positions for real-time monitoring of changes in waste acid.

[0013] Preferably, the temperature sensor is used to monitor temperature changes in real time, the pressure sensor is used to monitor the pressure in the device, the liquid level sensor ensures that the amount of liquid in each processing unit is within the normal range, and the gas detection alarm is used to detect harmful gas leaks in the device.

[0014] Temperature sensors are distributed at key locations to monitor temperature changes in real time and prevent dangerous situations such as decomposition of organic peroxides due to excessive temperature. Pressure sensors are used to monitor the pressure in the device to avoid safety accidents caused by abnormal pressure. Liquid level sensors ensure that the amount of liquid in each processing unit is within the normal range. The gas detection alarm can detect whether there is harmful gas leakage caused by the decomposition of organic peroxides in the device. Once an abnormality is detected, an alarm is immediately issued and the corresponding emergency measures are started.

[0015] Preferably, the waste acid collection unit is used to collect waste acid generated during production.

[0016] Preferably, the waste acid collection unit, the pretreatment unit, the separation unit, the oxidation-reduction treatment unit, the concentration and refining unit, and the control unit are sequentially connected by pipelines.

[0017] In summary, the present application includes at least one of the following beneficial effects:

[0018] 1. The organic peroxide waste acid recovery device realizes high purity, good quality, efficient recovery and repeated use of organic chemical raw materials in waste acid, and meets the development requirements of circular economy, energy saving and emission reduction.

[0019] 2. The organic peroxide waste acid recovery device has reasonable design, advanced technical route, simple operation, safe and stable treatment process, and does not produce secondary pollution in the treatment process. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The waste acid recovery device structure of the present application is shown in the figure.

[0021] Wherein: 1, waste acid feeding pipe; 2, filter assembly; 3, cooler; 4, centrifugal separator; 5, separatory funnel; 6, oxidation reactor; 7, reduction reactor; 8, evaporation concentrator; 9, ion exchange column. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] Please refer to Figure 1 The organic peroxide waste acid recovery device comprises a waste acid collection unit, a pretreatment unit, a separation unit, an oxidation-reduction treatment unit, a concentration and refining unit and a control unit, characterized in that the pretreatment unit comprises a waste acid feeding pipe 1, a filter assembly 2 and a cooler 3, the waste acid feeding pipe 1, the filter assembly 2 and the cooler 3 are sequentially communicated through pipelines, the filter assembly 2 is internally provided with multiple layers of filter screens with different pore sizes for removing solid impurities and part of macromolecular organic matters in the waste acid, the cooler 3 adopts a jacketed structure and cools the waste acid to a suitable temperature through circulating cooling liquid, the separation unit comprises a centrifugal separator 4 and a separatory funnel 5, the centrifugal separator 4 separates organic phase and acid phase in the waste acid, and the separatory funnel 5 is used for standing the mixed liquid after separation; the oxidation-reduction treatment unit comprises an oxidation reactor 6 and a reduction reactor 7, an oxidizing agent is introduced into the oxidation reactor 6 for decomposing residual organic matter oxidants in the waste acid, a reducing agent is introduced into the reduction reactor 7 for reducing high-valence state oxidizing impurities possibly existing in the waste acid, and stirring devices are installed in the oxidation reactor 6 and the reduction reactor 7; the concentration and refining unit comprises an evaporation concentrator 8 and an ion exchange column 9, the evaporation concentrator 8 is internally provided with a temperature and pressure control system and removes water in the waste acid through heating evaporation, the ion exchange column 9 is internally filled with ion exchange resin for removing impurities in the waste acid, the waste acid collection unit is used for collecting waste acid generated in the production process, and the waste acid collection unit, the pretreatment unit, the separation unit, the oxidation-reduction treatment unit, the concentration and refining unit and the control unit are sequentially communicated through pipelines.

[0024] Through the above technical scheme, the feeding pipe is communicated with the waste acid collection unit, after the waste liquid is collected, the waste acid enters the filter assembly 2 through the waste acid feeding pipe 1, in the filter assembly 2, the waste acid sequentially passes through filter screens with different pore sizes, and large-particle solid impurities and part of macromolecular organic matters are intercepted on the filter screens. After filtration, the waste acid flows into the cooler 3, and the cooling liquid in the jacket circulates to reduce the temperature of the waste acid by 5-10°C.

[0025] The cooled waste acid enters the centrifugal separator 4, and under the action of centrifugal force, the organic phase and the acid phase begin to be preliminarily separated. The mixed liquid after centrifugation enters the separatory funnel 5 for static layering, and the static layering time is 30 min. After layering, the lower layer of waste acid flows out through a pipeline to enter the next processing link, and the upper layer of organic phase can be collected through a special pipeline; the waste acid flowing out from the separatory funnel 5 enters the oxidation reactor 6, and hydrogen peroxide is introduced into the oxidation reactor 6 at a certain ratio, the stirring device is started, the stirring speed is set to 100 r / min, and the reaction time is 30 min to oxidize the organic matter in the waste acid. The oxidized waste acid enters the reduction reactor 7, and an appropriate amount of iron powder is added, and the stirring is continued at 100 r / min for 30 min to reduce the high-valence oxidizing impurities; the waste acid after oxidation and reduction treatment enters the evaporation concentrator 8, and the temperature is controlled at 150°C, and the pressure is controlled at 0.5 MPa to evaporate the water, and the concentrated acid liquid flows into the ion exchange column 9. In the ion exchange column 9, the acid liquid passes through the ion exchange resin at a flow rate of 2 m / h to remove impurity ions to obtain high-purity recovered acid; during the entire operation process, the temperature sensor, the pressure sensor and the liquid level sensor monitor the temperature, the pressure and the liquid level in the device in real time. If the temperature exceeds the upper limit (50°C), the cooling system automatically increases the flow rate of the cooling liquid; if the pressure exceeds the safety value (0.8 MPa), the safety valve automatically opens to release pressure; if the liquid level is abnormal, the corresponding feeding or discharging valve is automatically adjusted. The gas detection alarm continuously detects the gas composition in the device, and once harmful gases (combustible gas concentration exceeding 20% of the lower explosive limit) produced by the decomposition of organic peroxide are detected, an alarm is immediately given, and the ventilation system and the emergency shutdown program are started.

[0026] Specifically, the control unit includes temperature sensors, pressure sensors, liquid level sensors and gas detection alarms, which are distributed at key positions to monitor the changes of waste acid in real time. The temperature sensor is used to monitor the temperature change in real time, the pressure sensor is used to monitor the pressure in the device, the liquid level sensor ensures that the liquid volume in each processing unit is within the normal range, and the gas detection alarm is used to detect the leakage of harmful gases in the device.

[0027] Through the above technical solution, the temperature sensor is distributed at key positions to monitor the temperature change in real time, preventing dangerous situations such as decomposition of organic peroxide due to excessive temperature. The pressure sensor is used to monitor the pressure in the device to avoid safety accidents caused by abnormal pressure. The liquid level sensor ensures that the liquid volume in each processing unit is within the normal range. The gas detection alarm can detect whether harmful gases produced by the decomposition of organic peroxide leak in the device. Once an abnormality is detected, an alarm is immediately given and the corresponding emergency treatment measures are started.

[0028] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely exemplary and that changes can be made in detail without departing from the principles and spirit of the application. The scope of the application is therefore defined by the appended claims and their equivalents.

Claims

1. An organic peroxide waste acid recovery apparatus comprising a waste acid collection unit, a pretreatment unit, a separation unit, a redox treatment unit, a concentration and purification unit, and a control unit, characterized by: The pre-treatment unit comprises a waste acid feeding pipe (1), a filter assembly (2) and a cooler (3), which are sequentially communicated through pipes, the filter assembly (2) is internally provided with multiple layers of filter screens with different aperture sizes for removing solid impurities and part of macromolecular organic matters in the waste acid, and the cooler (3) adopts a jacketed structure and cools the waste acid to a suitable temperature through circulating cooling liquid; The separation unit comprises a centrifugal separator (4) and a separatory funnel (5), the centrifugal separator (4) separates organic phase and acid phase in the waste acid, and the separatory funnel (5) is used for standing the mixed liquid after separation; the oxidation-reduction treatment unit comprises an oxidation reactor (6) and a reduction reactor (7), the oxidation reactor (6) is provided with an oxidizing agent for decomposing residual organic matter oxides in the waste acid, and the reduction reactor (7) is provided with a reducing agent for reducing high-valence state oxidizing impurities possibly existing in the waste acid, and the oxidation reactor (6) and the reduction reactor (7) are both provided with stirring devices; the concentration and refining unit comprises an evaporation concentrator (8) and an ion exchange column (9), the evaporation concentrator (8) is internally provided with a temperature and pressure control system and removes water in the waste acid through heating evaporation, and the ion exchange column (9) is filled with ion exchange resin for removing impurities in the waste acid.

2. The organic peroxide waste acid recovery apparatus according to claim 1, characterized by: The control unit comprises temperature sensors, pressure sensors, liquid level sensors and gas detection alarms, and is distributed at key positions for real-time monitoring of waste acid changes.

3. An organic peroxide waste acid recovery apparatus according to claim 2, characterized by: The temperature sensors are used for real-time monitoring of temperature changes, the pressure sensors are used for monitoring pressure conditions in the device, the liquid level sensors ensure that the liquid amount in each treatment unit is within a normal range, and the gas detection alarms are used for detecting harmful gas leakage in the device.

4. The organic peroxide waste acid recovery apparatus according to claim 1, characterized by: The waste acid collecting unit is used for collecting waste acid generated in the production process.

5. The organic peroxide waste acid recovery apparatus according to claim 1, characterized by: The waste acid collecting unit, the pre-treatment unit, the separation unit, the oxidation-reduction treatment unit, the concentration and refining unit and the control unit are sequentially communicated through pipes. The waste acid collecting unit, the pre-treatment unit, the separation unit, the oxidation-reduction treatment unit, the concentration and refining unit and the control unit are sequentially communicated through pipes.

Images