CSTR reactor

Abstract

The utility model discloses a CSTR (continuous stirred-tank reactor). The CSTR comprises a first raw material tank, a second raw material tank, a third raw material tank, a first-stage reactor, a first-stage material transfer pump, a first-stage heat exchanger, a first-stage condenser, a second-stage reactor, a second-stage condenser, a first-stage material transfer pump and a tail gas absorption tower, the first raw material tank, the second raw material tank and the third raw material tank are all communicated with the first-stage reactor, and the first raw material tank is also communicated with the second-stage reactor; the first-stage reactor and the second-stage reactor are respectively provided with a first-stage condenser and a second-stage condenser which are matched with the tail gas absorption tower; the first-stage reactor forms internal circulation through a first-stage material transfer pump and a first-stage heat exchanger; the second-stage reactor forms internal circulation through a first-stage material transfer pump; the primary reactor is provided with an overflow pipe communicated with the secondary reactor. According to the technical scheme, existing equipment is optimized, and the number of the reaction kettles is reduced through continuous transformation.

Description

Technical Field

[0001] The utility model relates to a chemical equipment, in particular to a full mixed flow reactor, referred to as a CSTR reactor. Background Art

[0002] The existing reaction device is limited in production efficiency and requires more than 9 20m 3 The reactor is needed to complete the production, and the above method currently needs to be optimized.

[0003] A fully mixed flow reactor (CSTR) is a reactor that evenly mixes reactants in the reactor to maintain uniform concentration of reactants so that the reaction can achieve the best effect. Depending on whether there is a reflux pipe in the reactor, the fully mixed flow reactor can be divided into a fully mixed flow reactor with a reflux pipe and a fully mixed flow reactor without a reflux pipe. Utility Model Content

[0004] The utility model aims to provide a CSTR reactor, and solves the technical problem of optimizing the existing equipment and reducing the number of reaction kettles through continuous transformation.

[0005] The CSTR reactor comprises a first raw material tank, a second raw material tank, a third raw material tank, a primary reactor, a primary material transfer pump, a primary heat exchanger, a primary condenser, a secondary reactor, a secondary condenser, a primary material transfer pump and a tail gas absorption tower; the first raw material tank, the second raw material tank and the third raw material tank are all connected with the primary reactor, and the first raw material tank is also connected with the secondary reactor; the primary reactor and the secondary reactor are respectively equipped with a primary condenser and a secondary condenser to cooperate with the tail gas absorption tower; the primary reactor forms an internal circulation through the primary material transfer pump and the primary heat exchanger; the secondary reactor forms an internal circulation through the primary material transfer pump; the primary reactor has an overflow pipe connected to the secondary reactor.

[0006] The third raw material tank is a solid raw material weighing storage tank.

[0007] The first raw material tank is provided with an explosion vent, which is communicated with the buffer tank.

[0008] The primary reactor and the secondary reactor are both full mixed flow reactors.

[0009] The beneficial effects of the utility model are:

[0010] 1. The third raw material tank is a weighing storage tank for solid raw materials, which can control the feed amount. The liquid raw materials in the first and second raw material tanks are transferred by pumps, which are interlocked with flow meters to monitor the instantaneous flow and total feed amount in real time.

[0011] 2. A transfer pump and a heat exchanger are configured after the primary reactor to meet the strong exothermic reaction and make up for the insufficient heat exchange area of ​​the reactor. At the same time, an overflow pipe is set in the primary reactor to effectively control the discharge and prevent blockage, which is suitable for solid environments.

[0012] 3. The reactor is a fully mixed flow reactor, which can be set to different volumes to match different production capacities. It has good flexibility and can be used for gradual capacity increase.

[0013] 4. Compared with the existing technology, this CSTR reactor can effectively reduce the concentration of the reactor for high-risk and high reaction heat systems. The introduction of multiple sensors and automatic control interlocking makes the device have the advantages of reasonable design, safety, stability, economy and environmental protection. It is carried out under conditions where the risks are relatively controllable. At the same time, the setting of the external heat exchanger can effectively transfer heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the present CSTR reactor;

[0015] In the picture

[0016] 1. The first raw material tank;

[0017] 2. The second raw material tank;

[0018] 3. The third raw material tank;

[0019] 4. Primary reactor, 41. Overflow pipe;

[0020] 5. Secondary reactor;

[0021] 6. Primary material transfer pump;

[0022] 7. Primary condenser;

[0023] 8. Secondary condenser;

[0024] 9. Primary heat exchanger;

[0025] 10. Tail gas absorption tower. DETAILED DESCRIPTION

[0026] Please refer to Figure 1 The first raw material tank 1 in the figure is used to store the first liquid raw material, and the liquid raw material is transported into the primary reactor 4 and the secondary reactor 5 by a pump for reaction. The liquid raw material is measured by a flow meter at the same time. The pump and the flow meter are interlocked to monitor the instantaneous flow rate and the total amount of feed in real time.

[0027] The second raw material tank 2 in the figure is used to store the second liquid raw material, which is transported by a pump to the primary reactor 4 for reaction. The liquid raw material is also measured by a flow meter. The pump and the flow meter are interlocked to monitor the instantaneous flow rate and the total amount of feed in real time.

[0028] The third raw material tank 3 in the figure is used to store solid raw materials. The raw material tank is equipped with a weighing device to control the feeding amount. Through the configuration of the above three raw material tanks, the feeding of solid and liquid raw materials can achieve continuous mixed feeding and the feeding ratio can be controlled during continuous feeding. It can be adjusted according to the state of different materials and reaction capacity, and it has universality.

[0029] The primary reactor 4 in the figure is a full mixed flow reactor, which can be set with different volumes to match different production capacities, has good flexibility, and can be used for gradual capacity improvement. A plurality of temperature and liquid level sensors are arranged on the reactor to monitor the reaction of the reactor. A primary transfer pump 6 and a primary heat exchanger 9 are designed after the primary reactor 4 to meet the strong exothermic reaction and make up for the problem of insufficient heat exchange area of ​​the reactor. At the same time, an overflow pipe 41 is designed for the primary reactor 4 to effectively control the discharge and prevent blockage, which is suitable for solid environments. In this way, the primary reactor 4 adds a dual discharge form of an overflow pipe 41 and a pump transfer, and uses working conditions with different media. When there are solid impurities in the material, overflow discharge can be used. When the material is a homogeneous liquid system, pump discharge can be used. At the same time, the pump uses a large flow circulation pump, which can enhance the reaction mixing. The reaction in this reactor is a continuous reaction, and the concentration in the reaction is low, which is conducive to the control of the reaction. The material in the primary reactor 4 is partially refluxed after the primary circulation pump and the primary heat exchanger 9, and part of it is continuously entered into the secondary reactor 5 through liquid level metering, and the material of the secondary reactor 5 goes to the out-of-bounds receiving tank. Through the overflow pipe 41, when the material is viscous or contains solids, the material can be discharged in the form of overflow. The material in the primary reactor 4 continuously enters the secondary reactor 5 through the overflow pipe 41, and the material in the secondary reactor 5 goes to the receiving tank outside the boundary. The heat exchange area of ​​the primary heat exchanger 9 is large due to its internal structure, which can reach several times the specific surface area of ​​the stirred tank, which can make up for the problem of insufficient area of ​​the kettle heat exchanger. The reactor is also equipped with a primary condenser 7, so that the tail gas generated by the reaction is transported to the tail gas absorption tower 10 for treatment.

[0030] The secondary reactor 5 in the figure is also a full mixed flow reactor, which can be set to different volumes to match different production capacities, has good flexibility, and can be used for gradual capacity improvement. A plurality of temperature and liquid level sensors are arranged on the reactor to monitor the reaction conditions of the reactor. A secondary condenser 8 and a primary transfer pump 6 are designed after the secondary reactor 5. The secondary condenser 8 thus transports the tail gas generated by the reaction to the tail gas absorption tower 10 for treatment, and the primary transfer pump 6 realizes the reaction cycle of the reactants in the reactor.

[0031] The primary condenser 7, the secondary condenser 8, the primary material transfer pump 6 and the primary heat exchanger 9 in the figure are all existing components, and their functions can also refer to the existing technology.

[0032] The working principle of this CSTR reactor is: two liquid raw materials enter the primary reactor 4 after being measured by a flow meter, and the solid raw materials enter the primary reactor 4 continuously by weighing and vacuum feeding to ensure the homogeneity of the materials. After the reaction, the heat is transferred through the cooling water of the reactor jacket, and the setting of the primary heat exchanger 9 outside the reactor can flexibly increase the heat exchange area required for the reaction, which is conducive to the heat transfer and avoids the problem of insufficient heat exchange area of ​​the kettle reaction used in the existing equipment. When over-temperature occurs, the reaction device starts in a chain, automatically cuts off the feed and adds cooling medium to the reactor, interrupting the reaction to ensure the safety of the reaction. When over-temperature is uncontrollable, the material enters the buffer tank through the explosion vent. .

[0033] The specific embodiments described above are only used to explain the present technical solution and are not used to limit the present technical solution. In the description of the present technical solution, it should be noted that the terms such as "upper" and "inner" indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present technical solution and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present technical solution.

[0034] At the same time, in the description of this technical solution, it should be noted that, unless otherwise clearly specified and limited, the terms "fixed" and "matched" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this technical solution can be understood according to specific circumstances.

[0035] Although embodiments of the present technical solution have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present technical solution, and that the scope of the present technical solution is defined by the appended claims and their equivalents.

Claims

1. CSTR reactor, characterized in that: The invention comprises a first raw material tank (1), a second raw material tank (2), a third raw material tank (3), a primary reactor (4), a primary material transfer pump (6), a primary heat exchanger (9), a primary condenser (7), a secondary reactor (5), a secondary condenser (8), and a tail gas absorption tower (10); the first raw material tank (1), the second raw material tank (2), and the third raw material tank (3) are all connected to the primary reactor (4), and the first raw material tank (1) is also connected to the secondary reactor (5); the primary reactor (4) and the secondary reactor (5) are respectively equipped with a primary condenser (7) and a secondary condenser (8) to cooperate with the tail gas absorption tower (10); the primary reactor (4) forms an internal circulation through the primary material transfer pump (6) and the primary heat exchanger (9); the secondary reactor (5) forms an internal circulation through another primary material transfer pump (6); and the primary reactor (4) has an overflow pipe (41) connected to the secondary reactor (5).

2. The CSTR reactor according to claim 1, characterized in that: The third raw material tank (3) is a solid raw material weighing storage tank.

3. The CSTR reactor according to claim 2, characterized in that: The first raw material tank (1) is provided with an explosion vent, which is connected to the buffer tank.

4. The CSTR reactor according to claim 3, characterized in that: The primary reactor (4) and the secondary reactor (5) are both fully mixed flow reactors.

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