Anti-scaling device of saponification mixer
By using regular reverse flushing of feed diameter variable joints and backlash joints in the saponification mixer, changing the flow rate of the diameter variable tube and built-in baffle structure, combined with ultrasonic scale-proof device, the scaling problem of saponification mixer is solved, and the long-term operation and cost reduction of the system are achieved.
Patent Information
- Application Number
- CN202422401602.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-30
AI Technical Summary
In the chlorohydrin propylene oxide production process, the saponification mixer is prone to scale due to the reaction of lime milk and chloropropanol, which affects the operating load of the device and requires frequent cleaning and cannot operate for a long period of time.
The feed diameter variable joint and the diameter variable backflush joint are used to achieve regular reverse flushing. Combined with the feed diameter variable tube, the feed diameter is changed, the fluid flow rate is increased, and an axial connecting plate and baffle plate are installed in the saponification mixer to promote mixing, and an ultrasonic scale preventer is installed to prevent scaling.
It extends the use cycle of the saponification system, reduces the frequency of cleaning, and reduces production costs.
Smart Images
Figure CN223112948U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a saponification mixer in the production process of propylene oxide, and particularly relates to an anti-scaling device for a saponification mixer. Background Art
[0002] In the production process of propylene oxide by the chlorohydrin method, the saponification reaction is one of the core processes. That is, the chloropropanol hydrochloric acid solution and about 17% lime milk are pre-reacted in a saponification mixer under alkaline conditions, and then completely reacted in a saponification tower. The propylene oxide generated in the reaction is blown out by steam stripping to form crude propylene oxide. During the saponification reaction process, the saponification mixer is important as a mixing and pre-reaction equipment for the saponification reaction. Due to the exothermic reaction between lime milk and chloropropanol, and the excess of lime milk, it is easy to scale inside the mixer, resulting in a continuous decrease in the operating load of the device, and regular cleaning is required, which is not conducive to the long-term operation of the saponification system. According to the above situation, anti-scaling research is carried out on the mixing process and external structure of the saponification mixer, and an anti-scaling device for the saponification mixer is designed. Content of the Utility Model
[0003] The purpose of the utility model is to provide an anti-scaling device for a saponification mixer aiming at the above-mentioned defects existing in the prior art. By realizing regular switching through the feed diameter-changing joint and the diameter-changing backflush joint, the main body of the saponification mixer can be flushed in the reverse direction, and the scaling period can be prolonged. In addition, by changing the feed pipe diameter through the feed diameter-changing pipe and increasing the fluid flow rate and other measures, the internal scaling of the saponification mixer and the pipeline can be alleviated, the service life of the saponification system can be prolonged, the cleaning frequency of the saponification system can be reduced, and thus the production cost can be reduced.
[0004] An anti-scaling device for a saponification mixer mentioned in the utility model, its technical solution is: it includes a feed diameter-changing joint (1), a feed diameter-changing pipe (2), a main body of the saponification mixer (3), a diameter-changing backflush joint (4), a lime milk storage tank (6), a chloropropanol solution storage tank (7), a lime milk feed pump (8), a chloropropanol feed pump (9), and a mixed liquid storage tank (10). One end of the main body of the saponification mixer (3) is movably connected to one end of the feed diameter-changing pipe (2), the other end of the feed diameter-changing pipe (2) is movably connected to the feed diameter-changing joint (1), the outer end of the feed diameter-changing joint (1) is connected to the chloropropanol solution storage tank (7) through a pipeline and the chloropropanol feed pump (9), and a lime milk inlet pipe (1.2) is arranged on the upper wall of the feed diameter-changing joint (1); the other end of the main body of the saponification mixer (3) is movably connected to the diameter-changing backflush joint (4), the outer end of the diameter-changing backflush joint (4) is connected to the mixed liquid storage tank (10) through a pipeline, and a lime milk backflush pipe (4.3) is arranged at the upper end of the diameter-changing backflush joint (4).
[0005] Preferably, a mixing agitator (3.2) is provided in the inner cavity of the saponification mixer body (3), a mixer backflush joint (3.1) is provided at the lower part of the saponification mixer body (3), an ultrasonic anti-scaling device (5) is installed on the saponification mixer body (3), one end of the saponification mixer body (3) is provided with a first connection flange (3.3), and the other end is provided with a second connection flange (3.4).
[0006] Preferably, the above-mentioned mixing agitator (3.2) includes an axial connecting plate (3.2.1), a first arc-shaped baffle (3.2.2), a first baffle plate (3.2.3), a second arc-shaped baffle (3.2.4), and a second baffle plate (3.2.5). A plurality of axial connecting plates (3.2.1) are arranged along the inner cavity of the saponification mixer body (3). A first arc-shaped baffle (3.2.2) and a second arc-shaped baffle (3.2.4) are installed between the plurality of axial connecting plates (3.2.1), a first baffle plate (3.2.3) is provided on the front side, and a second baffle plate (3.2.5) is provided on the rear side.
[0007] Preferably, there are two groups of the above-mentioned first arc-shaped baffles (3.2.2), which are cross-connected to form a cross-shaped structure.
[0008] Preferably, the above-mentioned first baffle plate (3.2.3) is installed on the lower side of the inner wall of the saponification mixer body (3), and the second baffle plate (3.2.5) is installed on the upper side of the inner wall of the saponification mixer body (3).
[0009] Preferably, the above-mentioned first baffle plate (3.2.3) and the second baffle plate (3.2.5) are rectangular structures.
[0010] Preferably, a first flange (1.1) is provided at the outer end of the above-mentioned feed reducer joint (1), a second flange (1.3) is provided at the inner end, and it is connected to the first connection flange (3.3) of the saponification mixer body (3) through the second flange (1.3).
[0011] Preferably, a third flange (4.1) is provided at the inner end of the above-mentioned reducer backflush joint (4), a fourth flange (4.2) is provided at the outer end, and the third flange (4.1) is connected to the second connection flange (3.4) of the saponification mixer body (3).
[0012] The beneficial effects of the present utility model are as follows: The present utility model adopts a feed reducing joint and a feed reducing pipe, whose inner diameters change, causing the flow rate of the liquid to change, reducing the probability of siltation and the occurrence of fouling; inside the saponification mixer body, there are an axial connecting plate, a first arc-shaped baffle, a first baffle plate, a second arc-shaped baffle, and a second baffle plate, which can make the liquid mix better. Moreover, on the right side of the saponification mixer body, there is a reducing backflush joint, and lime milk solution can be periodically injected into the reducing backflush joint through the lime milk backflush pipe, thereby flushing the inner cavity of the saponification mixer body, alleviating the fouling situation, and prolonging the fouling cycle; in addition, an ultrasonic anti-scaling device can also be installed on the saponification mixer body to achieve the anti-scaling effect, prolong the service life of the saponification system, reduce the cleaning frequency of the saponification system, and thus reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural diagram of the first embodiment of the present utility model;
[0014] Figure 2 is a schematic structural diagram of the saponification mixer body;
[0015] Figure 3 is a schematic side structural diagram of the axial connecting plate and the first arc-shaped baffle;
[0016] Figure 4 is a schematic structural diagram of the second embodiment of the present utility model;
[0017] Figure 5 is a schematic structural diagram of the saponification mixer body of the second embodiment; In the above figures: feed reducing joint 1, feed reducing pipe 2, saponification mixer body 3, reducing backflush joint 4, ultrasonic anti-scaling device 5, lime milk storage tank 6, chloropropanol solution storage tank 7, lime milk feed pump 8, chloropropanol feed pump 9, mixed liquid storage tank 10, first control valve 11, second control valve 12, third control valve 13, first flange 1.1, lime milk inlet pipe 1.2, second flange 1.3, mixer backflush joint 3.1, mixing agitator 3.2, first connecting flange 3.3, second connecting flange 3.4, axial connecting plate 3.2.1, first arc-shaped baffle 3.2.2, first baffle plate 3.2.3, second arc-shaped baffle 3.2.4, second baffle plate 3.2.5; third flange 4.1, fourth flange 4.2, lime milk backflush pipe 4.3. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0019] The following is a description of the preferred embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not intended to limit the present utility model.
[0020]
[0020] Example 1, referring to Figures 1-3 , a scale prevention device for a saponification mixer mentioned in the present utility model includes a feed reducer joint 1, a feed reducer pipe 2, a saponification mixer main body 3, a reducer backflush joint 4, a lime milk storage tank 6, a chloropropanol solution storage tank 7, a lime milk feed pump 8, a chloropropanol feed pump 9, and a mixed liquid storage tank 10. One end of the saponification mixer main body 3 is movably connected to one end of the feed reducer pipe 2, and the other end of the feed reducer pipe 2 is movably connected to the feed reducer joint 1. The outer end of the feed reducer joint 1 is connected to the chloropropanol solution storage tank 7 through a pipeline and the chloropropanol feed pump 9, and a lime milk inlet pipe 1.2 is provided on the upper wall of the feed reducer joint 1. The other end of the saponification mixer main body 3 is movably connected to the reducer backflush joint 4, and the outer end of the reducer backflush joint 4 is connected to the mixed liquid storage tank 10 through a pipeline, and a lime milk backflush pipe 4.3 is provided on the upper end of the reducer backflush joint 4.
[0021] Among them, a mixing agitator 3.2 is provided in the inner cavity of the above-mentioned saponification mixer main body 3, a mixer backflush joint 3.1 is provided at the lower part of the saponification mixer main body 3, a first connection flange 3.3 is provided at one end of the saponification mixer main body 3, and a second connection flange 3.4 is provided at the other end.
[0022] Referring to Figure 2 , the mixing agitator 3.2 mentioned in the present utility model includes axial connecting plates 3.2.1, first arc baffles 3.2.2, first baffle plates 3.2.3, second arc baffles 3.2.4, and second baffle plates 3.2.5. A plurality of axial connecting plates 3.2.1 are arranged along the inner cavity of the saponification mixer main body 3, the first arc baffles 3.2.2 and the second arc baffles 3.2.4 are installed between the plurality of axial connecting plates 3.2.1, and a first baffle plate 3.2.3 is provided on the front side and a second baffle plate 3.2.5 is provided on the rear side.
[0023] Referring to Figure 2 , two groups of the above-mentioned first arc baffles 3.2.2 are provided and cross-connected to form a cross-shaped structure, which can play a role in disturbing the flow and better realize the functions of mixing and scale prevention.
[0024] Among them, the above-mentioned first baffle plate 3.2.3 is installed on the lower side of the inner wall of the saponification mixer main body 3, and the second baffle plate 3.2.5 is installed on the upper side of the inner wall of the saponification mixer main body 3, which better plays the role of mixing.
[0025] The above-mentioned first baffle plate 3.2.3 and second baffle plate 3.2.5 are of rectangular structures.
[0026] The outer end of the above-mentioned feed reducer joint 1 is provided with a first flange 1.1, and the inner end is provided with a second flange 1.3, and is connected to the first connection flange 3.3 of the saponification mixer main body 3 through the second flange 1.3.
[0027] The inner end of the variable-diameter recoil joint 4 described above is provided with a third flange 4.1, and the outer end is provided with a fourth flange 4.2. The third flange 4.1 is connected to the second connection flange 3.4 of the saponification mixer main body 3.
[0028] When the utility model is in use, the chloropropanol solution is sent into the first flange 1.1 of the feed variable-diameter joint 1 through the chloropropanol feed pump 9. The first control valve 11 is opened, and the second control valve 12 and the third control valve 13 are closed. The 17% lime milk solution is sent into the lime milk inlet pipe 1.2 of the feed variable-diameter joint 1 through the lime milk feed pump 8. Since the feed variable-diameter joint 1 and the feed variable-diameter pipe 2 adopt a variable-diameter structure, the inner diameter changes, which causes the flow rate of the liquid to change, reduces the probability of siltation, and reduces the fouling situation; the saponification mixer main body 3 is provided with an axial connecting plate 3.2.1, a first arc-shaped baffle 3.2.2, a first baffle 3.2.3, a second arc-shaped baffle 3.2.4, and a second baffle 3.2.5, which can make the liquid mix better. Moreover, a variable-diameter recoil joint 4 is provided on the right side of the saponification mixer main body 3. By closing the first control valve 11 and opening the second control valve 12 and the third control valve 13 regularly, the lime milk solution can be injected into the variable-diameter recoil joint 4 through the lime milk recoil pipe 4.3, so as to realize flushing the inner cavity of the saponification mixer main body 3, relieve the fouling situation, and extend the fouling cycle.
[0029] Embodiment 2, a saponification mixer anti-fouling device mentioned in the utility model, includes a feed variable-diameter joint 1, a feed variable-diameter pipe 2, a saponification mixer main body 3, a variable-diameter recoil joint 4, a lime milk storage tank 6, a chloropropanol solution storage tank 7, a lime milk feed pump 8, a chloropropanol feed pump 9, and a mixed liquid storage tank 10. One end of the saponification mixer main body 3 is movably connected to one end of the feed variable-diameter pipe 2, and the other end of the feed variable-diameter pipe 2 is movably connected to the feed variable-diameter joint 1. The outer end of the feed variable-diameter joint 1 is connected to the chloropropanol solution storage tank 7 through a pipeline and the chloropropanol feed pump 9, and the upper wall of the feed variable-diameter joint 1 is provided with a lime milk inlet pipe 1.2; the other end of the saponification mixer main body 3 is movably connected to the variable-diameter recoil joint 4, the outer end of the variable-diameter recoil joint 4 is connected to the mixed liquid storage tank 10 through a pipeline, and the upper end of the variable-diameter recoil joint 4 is provided with a lime milk recoil pipe 4.3.
[0030] The difference from Embodiment 1 is:
[0031] Referring to Figure 4 and Figure 5 , an ultrasonic anti-fouling device 5 is installed on the saponification mixer main body 3, and the anti-fouling effect is achieved through the ultrasonic anti-fouling device 5, and the service life is extended.
[0032] The above are only the preferred embodiments of the present utility model. Any person skilled in the art may modify the present utility model by using the technical solutions described above or modify it into equivalent technical solutions. Therefore, any simple modification or equivalent transformation made according to the technical solutions of the present utility model falls within the scope of protection required by the present utility model.
Claims
1. A device for preventing scale formation in a saponification mixer, characterized in that: It includes a feed reducer joint (1), a feed reducer pipe (2), a saponification mixer body (3), a reducer backflush joint (4), a lime milk storage tank (6), a chloropropanol solution storage tank (7), a lime milk feed pump (8), a chloropropanol feed pump (9), and a mixed liquid storage tank (10). One end of the saponification mixer body (3) is movably connected to one end of the feed reducer pipe (2), and the other end of the feed reducer pipe (2) is movably connected to the feed reducer joint (1). The outer end of the feed reducer joint (1) is connected to the chloropropanol solution storage tank (7) through a pipeline and the chloropropanol feed pump (9), and a lime milk inlet pipe (1.2) is provided on the upper wall of the feed reducer joint (1). The other end of the saponification mixer body (3) is movably connected to the reducer backflush joint (4). The outer end of the reducer backflush joint (4) is connected to the mixed liquid storage tank (10) through a pipeline, and a lime milk backflush pipe (4.3) is provided at the upper end of the reducer backflush joint (4).
2. The anti-scaling device for a saponification mixer according to claim 1, wherein: A mixing agitator (3.2) is provided in the inner cavity of the saponification mixer body (3). A mixer backflush joint (3.1) is provided at the lower part of the saponification mixer body (3). An ultrasonic anti-scaling device (5) is installed on the saponification mixer body (3). One end of the saponification mixer body (3) is provided with a first connection flange (3.3), and the other end is provided with a second connection flange (3.4).
3. The anti-scaling device for a saponification mixer according to claim 2, characterized in that: The mixing agitator (3.2) includes an axial connection plate (3.2.1), a first arc-shaped baffle (3.2.2), a first baffle plate (3.2.3), a second arc-shaped baffle (3.2.4), and a second baffle plate (3.2.5). A plurality of axial connection plates (3.2.1) are arranged along the inner cavity of the saponification mixer body (3). The first arc-shaped baffle (3.2.2) and the second arc-shaped baffle (3.2.4) are installed between the plurality of axial connection plates (3.2.1), and a first baffle plate (3.2.3) is provided on the front side, and a second baffle plate (3.2.5) is provided on the rear side.
4. A device for preventing scale formation in a saponification mixer according to claim 3, characterized in that: There are two groups of the first arc-shaped baffles (3.2.2), which are cross-connected to form a cross-shaped structure.
5. The anti-scaling device for a saponification mixer according to claim 3, characterized in that: The first baffle plate (3.2.3) is installed on the lower side of the inner wall of the saponification mixer body (3), and the second baffle plate (3.2.5) is installed on the upper side of the inner wall of the saponification mixer body (3).
6. The anti-scaling device for a saponification mixer according to claim 5, characterized in that: The first baffle plate (3.2.3) and the second baffle plate (3.2.5) are rectangular structures.
7. A scale prevention device for a saponification mixer according to claim 1, characterized in that: The outer end of the feed reducer joint (1) is provided with a first flange (1.1), and the inner end is provided with a second flange (1.3), and is connected to the first connection flange (3.3) of the saponification mixer body (3) through the second flange (1.3).
8. The anti-scaling device for a saponification mixer according to claim 7, wherein: The inner end of the reducer backflush joint (4) is provided with a third flange (4.1), and the outer end is provided with a fourth flange (4.2). The third flange (4.1) is connected to the second connection flange (3.4) of the saponification mixer body (3).