Frequency conversion regulation and control equipment for monomethylamine absorption circulation flow velocity
By introducing frequency conversion control equipment into the monomethylamine absorption process and using vacuum sensors and frequency converters to form a closed-loop control system, the problems of inflexible flow rate adjustment and low precision were solved, efficient automatic control was achieved, and the absorption effect and production efficiency were improved.
Patent Information
- Application Number
- CN202422311413.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-23
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2034-09-23
AI Technical Summary
In the prior art, the flow rate adjustment during the monomethylamine absorption process is inflexible and has low precision, making it difficult to achieve automated control, which affects the absorption effect and production efficiency.
By adopting frequency conversion control equipment, a frequency converter is introduced between the circulation pump and the vacuum pump, and the vacuum degree in the kettle is monitored in real time in combination with a vacuum sensor, a closed-loop control system is formed to automatically adjust the circulation pump speed to maintain the flow rate and vacuum degree at the optimal state.
The flow rate adjustment accuracy and automatic control capability of monomethylamine absorption are improved, and the absorption effect and production efficiency are improved.
Smart Images
Figure CN223439515U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to frequency conversion control equipment technical field especially relates to a kind of for methylamine absorption circulating flow rate's frequency conversion control equipment. BACKGROUND
[0002] Methylamine is an organic compound, chemical formula is CH3NH2, colorless gas at room temperature and normal pressure, specific gravity is 1.07 times of air, flammable and explosive, with strong irritating ammonia smell. The specific use multiple or dosage varies with the preparation content in the current chemical industry, the production process of acetamiprid, the absorption process of methylamine is crucial to the whole production process, in actual production, methylamine absorption is usually driven by fixed speed motor circulating pump, to maintain the flow rate of circulating liquid, but this way cannot be adjusted according to actual situation Flow rate and vacuum degree, there is slow speed, low precision, and difficult to realize automatic control problem, affect absorption effect and production efficiency.
[0003] The existing frequency conversion control equipment for methylamine absorption circulating flow rate, in actual use, methylamine absorption process flow rate adjustment is not flexible, precision is low, difficult to realize automatic control problem. UTILITY MODEL CONTENT
[0004] (I) technical problem solved
[0005] The utility model solves the technical problem that the prior art methylamine absorption process flow rate adjustment is not flexible, precision is low, difficult to realize automatic control, provides a kind of frequency conversion control equipment for methylamine absorption circulating flow rate, with higher practicability, and can be operated simply, structure is relatively simple.
[0006] (II) technical scheme
[0007] To achieve the above object, the utility model is realized by the following technical scheme: a kind of frequency conversion control equipment for methylamine absorption circulating flow rate, including methylamine removal kettle, the methylamine removal kettle one side is connected with two groups of absorption circulating pipe, one group of the absorption circulating pipe one end is sleeved with clamping assembly, the clamping assembly one side is rotatably connected with rotating rod, the rotating rod surface is sleeved with limit component, the clamping assembly is clamped with tee joint in the inside, the tee joint one end is communicated with buffer tank, the methylamine removal kettle top is sleeved with detection adjustment component, the buffer tank one side top is connected with nozzle, the nozzle one end is connected with injection pump, the nozzle other end is connected with centrifugal pump.
[0008] As a further scheme of the utility model, the clamping assembly comprises a lower clamping ring sleeved at one end of the absorption circulation pipe, and one end of the lower clamping ring is rotationally connected with an upper clamping ring, and the upper clamping ring is convenient for clamping and mounting the tee pipe.
[0009] As a further scheme of the utility model, the limiting assembly comprises a threaded rod sleeved on the surface of the rotating rod, and the surface of the threaded rod is threadedly connected with a limiting nut, and the limiting nut is convenient for extruding the bottom surface of the lower clamping ring.
[0010] As a further scheme of the utility model, the detection and adjustment assembly comprises a vacuum degree sensor sleeved at the top of the dimethylamine distillation kettle, and one end of the vacuum degree sensor is electrically connected with a frequency converter through a power line, and the frequency converter is convenient for adjusting the rotating speed of the circulating pump.
[0011] As a further scheme of the utility model, one end of the other group of absorption circulation pipes is throughly connected with a circulating pump, and the tee pipe is internally provided with a ball valve, and the ball valve is convenient for opening and closing the tee pipe.
[0012] As a further scheme of the utility model, one end of the jet pump is throughly connected with an elbow pipe, and the bottom of the elbow pipe is throughly connected with a water tank, and the water tank is convenient for storing jet water.
[0013] As a further scheme of the utility model, the bottom of the water tank is fixedly connected with a base, and one side of the base is fixedly connected with a supporting table, and the supporting table is convenient for supporting the frequency converter.
[0014] As a further scheme of the utility model, the top of the water tank is throughly connected with a water filling pipe, and the top of the buffer tank is sleeved with a pressure gauge, and the pressure gauge is convenient for detecting the internal pressure of the buffer tank.
[0015] As a further scheme of the utility model, the surface of the dimethylamine distillation kettle is fixedly connected with a hanging bracket, and the bottom of the dimethylamine distillation kettle is fixedly connected with four groups of supporting columns, and the supporting columns are convenient for supporting the dimethylamine distillation kettle and improve the stability.
[0016] (Three) beneficial effects
[0017] The utility model provides a kind of for dimethylamine absorption circulation flow rate frequency conversion control equipment, with following beneficial effects:
[0018] 1. The variable frequency control equipment for the flow rate of monomethylamine absorption cycle, through the setting of the detection adjustment assembly, in use, a water jet vacuum pump group is installed on the monomethylamine absorption cycle pipeline, the principle of mutual conversion of static pressure energy and dynamic pressure energy when fluid flows is used to extract gas, and the vacuum degree in the monomethylamine removal kettle is maintained; a frequency converter is introduced between the circulating pump and the vacuum pump, a vacuum degree sensor is arranged in the monomethylamine removal kettle, the vacuum degree in the kettle is monitored in real time, and a signal is fed back to the frequency converter, so that a closed loop control system is formed; according to the feedback signal of the vacuum degree sensor, the frequency converter automatically adjusts the rotating speed of the circulating pump, so that the flow rate of the circulating liquid and the vacuum degree are maintained at the set optimal state, and thus the absorption effect and the production efficiency are improved.
[0019] 2. The variable frequency control equipment for the flow rate of monomethylamine absorption cycle, through the setting of the clamping assembly and the limiting assembly, when it is necessary to connect and install the water jet vacuum pump group, the absorption cycle pipe is aligned with one end of the tee pipe, then two groups of lower clamping rings are clamped on the surfaces of the absorption cycle pipe and the tee pipe, the upper clamping ring is pulled to tightly adhere to the surface, the threaded rod is pulled, the rotating rod is rotated on the upper clamping ring, the threaded rod is clamped into the lower clamping ring, the limiting nut is twisted, the limiting nut is pressed against the bottom surface of the lower clamping ring, and thus the effect of conveniently installing the water jet vacuum pump group is achieved, the installation workload is reduced, and the convenience of the variable frequency control equipment is improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Fig. 1 It is a whole structure schematic view of the utility model;
[0021] Fig. 2 It is a split structure schematic view of the utility model;
[0022] Fig. 3 It is a detection adjustment assembly structure schematic view of the utility model;
[0023] Fig. 4 It is a clamping assembly and limiting assembly structure schematic view of the utility model.
[0024] In the drawing: 1, monomethylamine removal kettle; 2, absorption cycle pipe; 3, clamping assembly; 301, lower clamping ring; 302, upper clamping ring; 4, rotating rod; 5, limiting assembly; 501, threaded rod; 502, limiting nut; 6, tee pipe; 7, buffer tank; 8, detection adjustment assembly; 801, vacuum degree sensor; 802, frequency converter; 9, nozzle; 10, jet pump; 11, centrifugal pump; 12, circulating pump; 13, ball valve; 14, elbow; 15, water tank; 16, base; 17, support table; 18, water injection pipe; 19, pressure gauge; 20, hanger; 21, support column. DETAILED DESCRIPTION
[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the scope of protection of the utility model.
[0026] Please refer to Figs. 1 to 4 The utility model provides a kind of technical scheme: a kind of frequency conversion control equipment for monomethylamine absorption circulating flow rate, including monomethylamine removal kettle 1, and two groups of absorption circulating pipes 2 are connected through one side of monomethylamine removal kettle 1, and one end of one group of absorption circulating pipes 2 is sleeved with clamping assembly 3, the effect of water injection vacuum pump group is reached by the setting of clamping assembly 3 and limiting component 5, reduce installation workload, improve the convenience of frequency conversion control equipment, and one side of clamping assembly 3 is rotatably connected with rotating rod 4, and the surface of rotating rod 4 is sleeved with limiting component 5, and three-way pipe 6 is clamped in the inside of clamping assembly 3, and one end of three-way pipe 6 is communicated with buffer tank 7, and the top of monomethylamine removal kettle 1 is sleeved with detection adjustment component 8, the flow rate of circulating liquid and vacuum degree are maintained at the best state set, so as to improve absorption effect and production efficiency by the setting of detection adjustment component 8, and the top of one side of buffer tank 7 is connected through with nozzle 9, and one end of nozzle 9 is connected through with injection pump 10, and the other end of nozzle 9 is connected through with centrifugal pump 11.
[0027] Clamping assembly 3 includes lower clamping ring 301 that is sleeved on the one end of absorption circulating pipe 2, and one end of lower clamping ring 301 is rotatably connected with upper clamping ring 302, and the setting of upper clamping ring 302 plays the role of clamping and installing three-way pipe 6.
[0028] Limiting component 5 includes threaded rod 501 that is sleeved on the surface of rotating rod 4, and limiting nut 502 is screw-connected on the surface of threaded rod 501, and the setting of limiting nut 502 plays the role of extruding the bottom surface of lower clamping ring 301.
[0029] Detection adjustment component 8 includes vacuum degree sensor 801 that is sleeved on the top of monomethylamine removal kettle 1, and one end of vacuum degree sensor 801 is electrically connected with frequency converter 802 by power line, and the setting of frequency converter 802 plays the role of adjusting the rotating speed of circulating pump 12.
[0030] One end of the other group of absorption circulating pipes 2 is connected through with circulating pump 12, and ball valve 13 is arranged in the inside of three-way pipe 6, and the setting of ball valve 13 plays the role of opening and closing three-way pipe 6.
[0031] One end of injection pump 10 is connected through with elbow pipe 14, and the bottom of elbow pipe 14 is connected through with water tank 15, and the setting of water tank 15 plays the role of storing injection water.
[0032] The bottom of the water tank 15 is fixedly connected with a base 16, one side of the base 16 is fixedly connected with a supporting table 17, through the setting of the supporting table 17, the supporting table 17 plays a role of supporting the frequency converter 802.
[0033] The top of the water tank 15 is throughly connected with a water injection pipe 18, the top of the buffer tank 7 is sleeved with a pressure gauge 19, through the setting of the pressure gauge 19, the pressure gauge 19 plays a role of detecting the pressure inside the buffer tank 7.
[0034] The surface of the monomethylamine removal kettle 1 is fixedly connected with a hanging bracket 20, the bottom of the monomethylamine removal kettle 1 is fixedly connected with four groups of supporting columns 21, through the setting of the supporting columns 21, the supporting columns 21 play a role of supporting the monomethylamine removal kettle 1 and improving stability.
[0035] The model of the vacuum degree sensor 801 is HM27G of Hongmu Technology, and the model of the frequency converter 802 is ZYV800, and the above parameters and models can be selected according to actual conditions.
[0036] In the utility model, the working steps of the device are as follows:
[0037] The first step is that when the water injection vacuum pump group needs to be connected and installed, the absorption circulation pipe 2 is aligned with one end of the three-way pipe 6, then the two groups of lower clamping rings 301 are clamped on the surfaces of the absorption circulation pipe 2 and the three-way pipe 6, the upper clamping ring 302 is pulled to be close to the surface, the threaded rod 501 is pulled, the rotating rod 4 is rotated on the upper clamping ring 302, after the threaded rod 501 is clamped into the lower clamping ring 301, the limiting nut 502 is twisted, so that the limiting nut 502 extrudes the bottom surface of the lower clamping ring 301;
[0038] The second step is that when in use, the water injection vacuum pump group is additionally installed on the monomethylamine absorption circulation pipe 2, the principle that static pressure energy and dynamic pressure energy are converted with each other when fluid flows is utilized to extract gas, and the vacuum degree inside the monomethylamine removal kettle 1 is maintained; the frequency converter 802 is introduced between the circulating pump and the vacuum pump.
[0039] The third step is that the vacuum degree sensor 801 is arranged in the monomethylamine removal kettle 1 at the same time, the vacuum degree inside the kettle is monitored in real time, signals are fed back to the frequency converter 802, a closed loop control system is formed; according to the feedback signals of the vacuum degree sensor 801, the frequency converter 802 automatically adjusts the rotating speed of the circulating pump 12.
[0040] It should be noted that the equipment structure and the drawings of the utility model mainly describe the principle of the utility model, the setting of the power mechanism, the power supply system and the control system of the device is not completely described clearly in the technical principle of the design, and under the premise that the technical personnel in the field understand the principle of the above-mentioned utility model, the specific of the power mechanism, the power supply system and the control system can be clearly known, the control mode of the application file is automatically controlled through the controller, and the control circuit of the controller can be realized through simple programming of the technical personnel in the field.
[0041] The standard parts used in the application can be purchased from the market, and can be ordered according to the description and the drawings, the specific connection mode of each part adopts the conventional means such as bolt, rivet and welding in the prior art, the mechanical, part and equipment adopt the conventional type in the prior art, and the components known by the person skilled in the art, the structure and principle thereof can be known by the person skilled in the art through the technical manual or through the conventional experimental method.
[0042] Although the embodiments of the application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to the embodiments without departing from the principles and spirits of the application, and the scope of the application is defined by the appended claims and their equivalents.
Claims
1. A frequency conversion control device for monomethylamine absorption circulation flow rate, comprising a monomethylamine removal kettle (1), characterized in that: One side of the demethylamine kettle (1) is connected with two groups of absorption circulation pipes (2), one end of one group of the absorption circulation pipes (2) is sleeved with a clamping assembly (3), one side of the clamping assembly (3) is rotatably connected with a rotating rod (4), the surface of the rotating rod (4) is sleeved with a limiting assembly (5), the interior of the clamping assembly (3) is clamped with a three-way pipe (6), one end of the three-way pipe (6) is connected to a buffer tank (7), the top of the demethylamine kettle (1) is sleeved with a detection and adjustment assembly (8), the top of one side of the buffer tank (7) is connected with a nozzle (9), one end of the nozzle (9) is connected with a jet pump (10), and the other end of the nozzle (9) is connected with a centrifugal pump (11).
2. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: The clamping assembly (3) comprises a lower clamping ring (301) sleeved on one end of the absorption circulation pipe (2), and one end of the lower clamping ring (301) is rotatably connected to an upper clamping ring (302).
3. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: The limiting assembly (5) comprises a threaded rod (501) sleeved on the surface of the rotating rod (4), and the surface of the threaded rod (501) is threadedly connected to a limiting nut (502).
4. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: The detection and adjustment component (8) comprises a vacuum sensor (801) sleeved on the top of the demethylamine kettle (1), and one end of the vacuum sensor (801) is electrically connected to a frequency converter (802) via a power line.
5. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: One end of the other group of absorption circulation pipes (2) is connected to a circulation pump (12), and a ball valve (13) is provided inside the three-way pipe (6).
6. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: One end of the jet pump (10) is connected to a curved pipe (14), and the bottom of the curved pipe (14) is connected to a water tank (15).
7. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 6, characterized in that: The bottom of the water tank (15) is fixedly connected to a base (16), and one side of the base (16) is fixedly connected to a support platform (17).
8. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 7, characterized in that: The top of the water tank (15) is connected with a water injection pipe (18), and the top of the buffer tank (7) is sleeved with a pressure gauge (19).
9. The frequency conversion control device for monomethylamine absorption circulation flow rate according to claim 1, characterized in that: A hanger (20) is fixedly connected to the surface of the monomethylamine removal kettle (1), and four groups of support columns (21) are fixedly connected to the bottom of the monomethylamine removal kettle (1).