CN113230934B - Liquid level control system for scale-prone reactor and automatic mixed liquid blending system - Google Patents
Liquid level control system for scale-prone reactor and automatic mixed liquid blending system Download PDFInfo
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- CN113230934B CN113230934B CN202110563115.1A CN202110563115A CN113230934B CN 113230934 B CN113230934 B CN 113230934B CN 202110563115 A CN202110563115 A CN 202110563115A CN 113230934 B CN113230934 B CN 113230934B
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- liquid inlet
- lead
- control cabinet
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- 239000007788 liquid Substances 0.000 title claims abstract description 308
- 238000002156 mixing Methods 0.000 title claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 7
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229910001388 sodium aluminate Inorganic materials 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000010668 complexation reaction Methods 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
- B01F35/221—Control or regulation of operational parameters, e.g. level of material in the mixer, temperature or pressure
- B01F35/2212—Level of the material in the mixer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Control Of Non-Electrical Variables (AREA)
Abstract
The invention relates to the technical field of liquid level control, and provides a liquid level control system and an automatic blending system for mixed liquid. The liquid level control system includes: the liquid feeding device, the tank body, the first lead, the voltage control box and the PLC control cabinet; the tank body is provided with a liquid inlet through which the liquid is injected into the tank body by the liquid inlet device; the inner wall of the tank body can conduct electricity; one end of the first lead is arranged in the tank body and is not contacted with the inner wall of the tank body, and the other end of the first lead is connected with the voltage control box; the voltage control box is connected with the inner wall of the tank body, and when the liquid in the tank body contacts with the first wire, the liquid, the inner wall of the tank body and the voltage control box form a connected circuit; the PLC control cabinet is connected with the liquid inlet device and the voltage control box and is used for judging the height of liquid in the tank body according to the connected circuit and controlling the liquid injection and stop of the liquid inlet device. According to the scheme, the liquid inlet amount of the liquid is controlled through the height of the first lead, and the device is simple in structure, high in accuracy and low in price.
Description
Technical Field
The invention relates to the technical field of liquid level control, in particular to a liquid level control system for an easily-structured reactor and an automatic mixing system for mixed liquid.
Background
In some chemical processes, the mixture within the reactor is often a solid-liquid mixture, and the reaction temperature also needs to be maintained at a higher temperature, producing significant amounts of steam and foam. In this way, the steam will entrain solids adhering to the equipment inside the reactor. When liquid level detection is required, the liquid level meter can cause monitoring failure of the liquid level meter due to scaling in the reaction process. Taking the production of superfine aluminum hydroxide as an example, in the production, water, alkali liquor, seed slurry and sodium aluminate solution are mixed in proportion for reaction, a liquid level meter is usually arranged in the reactor, at the top or outside, and the liquid level meter commonly used at present comprises a communicating vessel liquid level meter, an ultrasonic liquid level meter, a radar liquid level meter, a floating ball liquid level meter, an electrode liquid level meter and the like. If an ultrasonic or radar level gauge is used, the scale may clog the sensing hole or a protective cover covering the sensing head, so that the sensitivity of the level gauge is greatly reduced after 1 month of use. If the scale is a floating ball liquid level meter, the scale is used for fixing the floating ball at a certain position or seriously affecting the position detection precision. If an electrode type liquid level meter is adopted, the arrangement of the electrode type liquid level meter makes a control circuit more complex and calculation more complex because of different conductive properties of various substances of the mixed liquid; if a plurality of electrode type liquid level meters are adopted, the complexity of the whole structure is increased, and the cost is increased.
Therefore, there is a need to develop a liquid level control system with simple structure, low cost and accurate measurement.
Disclosure of Invention
The invention aims to provide a liquid level control system which has the advantages of simple structure, accurate measurement and low cost, and meets the requirements of liquid level measurement after liquid mixing reactions with different conductivities.
According to a first aspect of the present invention, there is provided a liquid level control system comprising:
the liquid feeding device, the tank body, the first lead, the voltage control box and the PLC control cabinet;
the tank body is provided with a liquid inlet, and the liquid inlet is used for injecting liquid into the tank body;
the inner wall of the tank body can conduct electricity;
one end of the first lead extends into the tank body and is not in contact with the inner wall of the tank body, and the other end of the first lead is connected with the voltage control box;
the voltage control box is connected with the inner wall of the tank body through a second wire, and when the liquid in the tank body contacts with the first wire, the liquid, the inner wall of the tank body and the voltage control box form a connected circuit;
the PLC control cabinet is connected with the liquid inlet device and the voltage control box and is used for judging the height of liquid in the tank body according to the connected circuit and controlling the liquid injection and stop of the liquid inlet device.
Further, one end of the first lead extending into the tank body is a liquid contact end, and the first lead is contacted with liquid, so that the connection of a circuit is realized.
Further, the liquid is a conductive liquid.
Further, the first wires are arranged at the height of one end in the tank body according to the requirement.
Further, the height of one end of the plurality of first wires in the tank body corresponds to the height of the required liquid level.
Further, the liquid inlet device comprises a plurality of liquid inlet tanks, the liquid inlet on the tank body is a plurality of liquid inlet ports, and each liquid inlet tank corresponds to one liquid inlet port.
Further, the liquid inlet device further comprises a plurality of liquid inlet pumps, wherein the liquid inlet pumps are arranged between the liquid inlet tanks and the liquid inlet openings, and each liquid inlet pump corresponds to one liquid inlet tank; each liquid inlet pump is connected with the PLC control cabinet in a communication mode, and is controlled by the PLC control cabinet to pump or stop pumping liquid into the tank body.
Further, the liquid inlet device further comprises a plurality of valves, the valves are arranged between the liquid inlet pump and the liquid inlet, and each valve corresponds to one liquid inlet pump; each valve is connected with the PLC control cabinet in a communication mode and is controlled by the PLC control cabinet to open or close.
Further, the first wire is suspended at one end within the tank by a plumb.
Further, the first wire is composed of a single or multiple branch wires.
Further, a wire protection sleeve is arranged outside the first wire, and only one end of the first wire in the tank body is exposed from the liquid contact part.
Further, the voltage control box comprises an intermediate relay, the intermediate relay comprises a coil, two ends of the coil are respectively connected with the first lead and the inner wall of the tank body, the intermediate relay comprises a normally open point, the normally open point is connected with the PLC control cabinet, and when a closed circuit is formed, the normally open point is closed and a closing signal is sent to the PLC control cabinet.
Further, the voltage control box comprises a transformer, and two ends of the transformer are respectively connected with the first lead and the inner wall of the tank body.
Further, the voltage of the transformer is 5-24V, and the voltage is continuously provided in the using process.
Further, the PLC control cabinet comprises a control module, the control module receives signals of the voltage control box and sends out signals to control the closing and opening of the valve of the liquid inlet device and the liquid inlet pump. After the valve and the liquid inlet pump are switched from open to closed, the control module enters a locking state, and the valve and the liquid inlet pump are not allowed to be opened again. The valve and the liquid inlet pump will not be automatically opened again, and the valve and the liquid inlet pump can be opened when the valve and the liquid inlet pump are used next time.
Further, the liquid level control system further comprises an alarm, and the alarm is connected with the PLC control cabinet in a communication mode and used for reminding operators of completing liquid allocation.
According to a second aspect of the present invention, there is provided an automatic blending system for mixed liquids, comprising: the liquid level control system and the stirring equipment;
the PLC control cabinet of the liquid level control system is connected with the stirring equipment in a communication manner and is used for controlling the running and stopping of the stirring equipment;
the liquid level control system comprises more than two first leads, wherein the heights of the two first leads are not equal, the PLC control cabinet controls the liquid inlet device to inject more than two types of liquid into the tank body, and the number of the injected liquid is consistent with that of the first leads; the height of the injected 1 st liquid in the tank body is equal to the height of the first lead at the lowest position in one end of the tank body, the height of the injected n-th liquid in the tank body is equal to the difference between the heights of the first leads from the n-th low position to the n-1 th low position in one end of the tank body, and n is a natural number larger than 1.
The beneficial effects of the invention are as follows:
according to the principle that the liquid has conductivity, the liquid inlet amount is controlled by switching on and off the first conducting wire and the conductive reaction liquid in the reactor, so that the device has the advantages of simple structure, low price and high accuracy, and improves the quality stability of products. The first wires are connected with the PLC control cabinet, so that the liquid inlet amount of liquid and the mixing of various liquids are automatically controlled, the operation process is simplified, and the working efficiency is improved. The first lead uses a common conductive cable, and the material is simple and easy to obtain and has low cost. When one end of the first wire is found to be scaled to influence the monitoring effect, the first wire is only required to be drawn out, and the scale is knocked off and replaced, so that the device is very easy to maintain.
Drawings
Fig. 1 schematically illustrates an automatic compounding system for mixing liquids.
The device comprises a first lead, a second lead, a protective sleeve, a 3-tank body, a 4-second lead, a 5-voltage control box, a 6-PLC control cabinet, a 7-alarm, an 8-1-first valve, an 8-2-second valve, a 9-1-first liquid inlet pump, a 9-2-second liquid inlet pump, a 10-first liquid inlet tank, an 11-second liquid inlet tank and a 12-stirring device, wherein the first lead is 1-1, the second lead is 1-2, the protective sleeve is 2-lead, the 3-tank body is 4-second lead, the 5-voltage control box is 6-PLC control cabinet, the 7-alarm is 8-1-first valve, the 8-2-second valve is 9-1-first liquid inlet pump, the 9-2-second liquid inlet pump is 9-second liquid inlet tank and the stirring equipment is 12-stirring equipment.
Detailed Description
The following describes embodiments of the invention in detail, but the invention may be practiced in a variety of different ways, as defined and covered by the claims.
As a first embodiment of the present invention, there is provided an automatic blending system for mixed liquids, as shown in fig. 1, comprising: a fluid level control system and a stirring device 12.
The liquid level control system includes: the liquid inlet device, the tank body 3, the first leads 1-1 and 1-2, the second lead 4, the voltage control box 5, the PLC control cabinet 6 and the alarm 7.
The liquid inlet device comprises a first liquid inlet tank 10, a second liquid inlet tank 11, a first liquid inlet pump 9-1, a second liquid inlet pump 9-2, a first valve 8-1 and a second valve 8-2, wherein the liquid inlet tank, the liquid inlet pump and the valves are in one-to-one correspondence respectively. The tank body 3 is provided with 2 liquid inlets which are respectively a first liquid inlet and a second liquid inlet in one-to-one correspondence with the number of the liquid inlets. The first liquid inlet tank 10 is connected with a first liquid inlet, and the first liquid inlet pump 9-1 is arranged between the first liquid inlet tank 10 and the first liquid inlet and is used for pumping liquid in the first liquid inlet tank 10 into the tank body 3. The first valve 8-1 is arranged between the first liquid inlet pump 9-1 and the first liquid inlet and is used for opening or intercepting liquid in the first liquid inlet tank 10 from being injected into the tank body 3. The second liquid inlet tank 11 is connected with a second liquid inlet port, and the second liquid inlet pump 9-2 is arranged between the second liquid inlet tank pipe 10 and the second liquid inlet port and is used for pumping liquid in the second liquid inlet tank 11 into the tank body 3. The second valve 8-2 is arranged between the second liquid inlet pump 9-2 and the second liquid inlet and is used for opening or intercepting the liquid in the second liquid inlet tank 11 from being injected into the tank body 3. In actual operation, a plurality of liquid inlets can be arranged according to the types of the liquid. The liquid in the liquid inlet tank can be solution or evenly mixed slurry. The stirring tool can be arranged in the liquid inlet tank according to the liquid requirement.
The inner wall of the tank body 3 can be conductive, and conductive materials such as carbon steel, iron and the like can be selected. The stirring device 12 is arranged in the tank 3. The stirring device 12 enables a plurality of liquids to be mixed uniformly and rapidly, and the components of the liquids in the tank body 3 are kept consistent.
In this embodiment, the number of the first wires is 1-1 and 1-2. In actual operation, a plurality of first wires can be arranged according to the requirement, and the number of the first wires is the same as the number of the types of the injected liquid. The liquid level height is measured by using the lead, so that the cost is greatly reduced. One end of each first wire is a liquid contact end, is arranged in the tank body 3 and is not in contact with the inner wall of the tank body 3, and the other end of each first wire is connected with the voltage control box 6. A part of each first wire is arranged in the tank body 3, another part is arranged outside the tank body 3, and the part arranged outside the tank body 3 is connected to the voltage control box 5. The height of the liquid contact ends of each first wire is not equal. As shown in fig. 1, the height of the liquid contact end of the first wire 1-1 is lower than that of the liquid contact end of the first wire 1-2, and when the liquid contact end contacts with liquid, the first wire 1-1 or the first wire 1-2 and the liquid and the voltage control box 5 form a connected current, so that the liquid level measuring device can measure the liquid level. These heights are adjusted according to the volume of liquid entering the tank 3, and the more the number of first wires is, the more automatic dispensing of the liquid of various kinds can be controlled. Typically, the portion of the first wire within the tank 3 is disposed vertically. As an example, the first wires are suspended one plumb each such that the first wires are vertically perpendicular. . In another embodiment, the first wire is an electric wire covered with an insulating material, and the lower end of the first wire is connected to an electrode (electrode plate or electrode rod), and the electrode itself also has the function of a plumb. Each first wire is composed of a single or multiple branch wires. Preferably, the outside of the branch line in the tank 3 is provided with a wire protecting sleeve 2, and only the contact part of the liquid contacting end (namely the lowest end) of the first wire is exposed to the liquid, so that other parts of the first wire are prevented from being corroded by the liquid. When the outside of the wire protection sleeve 2 is fouled, the fouled dirt can be knocked down only by taking out the wire protection sleeve 2 and knocking, or the first wire is directly drawn out to remove the surface fouled and then used, so that the cost is greatly reduced and the measurement accuracy is improved. In this scheme, feed liquor device pours into two kinds of liquid into the jar body 3 in, and the kind quantity of liquid of pouring into is unanimous with the quantity of first wire. In an actual application scenario, if the number of kinds of injected liquid increases, the number of first wires correspondingly increases. The height of the 1 st liquid in the tank body 3 is equal to the height of the liquid contact end of the first lead at the lowest position, the height of the n-th liquid in the tank body is equal to the height difference between the n-th low position and the liquid contact end of the first lead at the n-1 th low position, and n is a natural number greater than 1. In this scheme, the height of 1 st kind of liquid of injection in jar body 3 equals the height of the contact end of first wire 1-1, and the height of 2 nd kind of liquid of injection in jar body 3 equals the difference in height of first wire 1-2 contact end to first wire 1-1 contact end.
A circuit is arranged in the voltage control box 5, the circuit is connected with the inner wall of the tank body 3 through a second lead 4, and the circuit comprises an intermediate relay and a transformer. The intermediate relay comprises a coil, and two ends of the coil are respectively connected with the two first leads 1-1 and 1-2 and the inner wall of the tank body for switching on an induction circuit. The intermediate relay also includes a normally open point. The two ends of the transformer are respectively connected with the first lead 1-1, the first lead 1-2 and the inner wall of the tank body 3 to provide voltage for the connected circuit. The transformer provides a safe voltage of 5-24V, and continuously provides voltage for the liquid level circuit to be conducted. When the liquid in the tank 3 is in contact with the liquid contact end of the first lead 1-1 or the liquid contact end of the first lead 1-2, the first lead 1-1 or 1-2, the liquid, the inner wall of the tank 3 and the voltage control box 5 form a closed circuit. When a closed circuit is formed, the normally open point of the intermediate relay is closed, and a closing signal of the normally open point is sent to the PLC control cabinet 6, so that the PLC control cabinet 6 obtains a signal that the liquid level reaches a certain height.
The PLC control cabinet 6 is connected with a liquid inlet pump and a valve of a liquid inlet device, a voltage control box 5, an alarm 7 and stirring equipment 12. The liquid feeding device is used for judging the height of liquid in the tank body 3 according to the connected circuit, controlling the liquid injection and stop injection of the liquid feeding device, controlling the starting and stop of the stirring equipment 12, reminding a worker of completing the mixing liquid preparation work, and prompting the worker to carry out the next related operation. The PLC is a programmable logic controller. A programmable logic controller is a digital operation electronic system designed specifically for application in an industrial environment. It adopts a programmable memory, in its interior is stored the instruction for executing logic operation, sequence control, timing, counting and arithmetic operation, etc. and utilizes digital or analog input and output to control various mechanical equipments or production processes.
The automatic blending system of the mixed liquid is adopted to produce the superfine aluminum hydroxide, and in the liquid blending of the production process of the superfine aluminum hydroxide, the liquid A (namely seed slurry) and the liquid B (namely sodium aluminate solution) are uniformly mixed, namely the decomposition liquid of the superfine aluminum hydroxide seed. Both the liquid a and the liquid B have conductivity and need to be injected into the tank 3 separately. Liquid a is stored in the first liquid-feeding tank 10 and liquid B is stored in the second liquid-feeding tank 11. The specific method comprises the following steps:
(1) Liquid a feed: the PLC control cabinet 6 sends out a signal, the stirring equipment 12 is started, the first valve 8-1 and the first liquid inlet pump 9-1 are opened, and the liquid A enters the tank body 3 from the first liquid inlet tank 10. After the liquid level contacts with the liquid contact end of the first lead wire 1-1, a circuit in the voltage control box 5 is connected, a normally open point in the voltage control box 5 is closed, a closing signal is sent to the PLC control cabinet 6, the PLC control cabinet 6 sends out a signal, and the first valve 8-1 and the first liquid inlet pump 9-1 are closed. The liquid A is fed to the end, the current control signal enters a locking state, the first valve 8-1 and the first liquid feeding pump 9-1 cannot be opened again, namely, the first valve 8-1 and the first liquid feeding pump 9-1 cannot be opened again automatically even though the liquid is suddenly high or low in the stirring process, the liquid can be opened manually when the liquid A is used next time, the liquid is prevented from being contacted with the liquid contact end of the first lead 1-1 again due to stirring, the first valve 8-1 and the first liquid feeding pump 9-1 are opened again to add the liquid A, and the accurate control of the volume of the liquid A is affected.
(2) Liquid B feed: after the step (1) is finished, the PLC control cabinet 6 sends out a signal, the second valve 8-2 and the second liquid inlet pump 9-2 are opened, and the liquid B enters the tank body 3 from the second liquid inlet tank 11. After the liquid level contacts with the liquid contact end of the first lead 1-2, a circuit in the voltage control box 5 is connected, a normally open point in the voltage control box 5 is closed, a closing signal is sent to the PLC control cabinet 6, the PLC control cabinet 6 sends out a signal, and the second valve 8-2 and the second liquid inlet pump 9-2 are closed. The liquid B is fed to the end, the current control signal enters a locking state, the second valve 8-2 and the second liquid feeding pump 9-2 cannot be opened again, namely, the second valve 8-2 and the second liquid feeding pump 9-2 cannot be opened again automatically even though the liquid is suddenly high or low in the stirring process, the liquid can be opened manually when the liquid B is used next time, the liquid B is prevented from being added due to the fact that the second valve 8-2 and the second liquid feeding pump 8-2 are opened again due to the fact that the liquid is stirred to contact with the liquid contact end of the first lead 1-2 again, and the accurate control of the volume of the liquid B is affected. The PLC control cabinet 6 opens the alarm 7 to remind the staff to enter the next process.
The method can accurately control the liquid level of various liquids in the production of superfine aluminum hydroxide and can automatically allocate the liquid level through the automatic mixed liquid allocation system, and can also accurately control the liquid level of other liquids with conductivity. Through the principle that liquid has conductivity, liquid and first wire contact form the circuit of intercommunication, do not receive influence such as high temperature, steam, foam to the intake volume of highly control liquid of first wire has realized the accurate control of liquid level, and it is simple to measure, low price, intake volume control is accurate, has improved product quality stability. The first wires are connected with the PLC control cabinet 6, so that the liquid inlet amount of various liquids is automatically controlled, the operation process is simplified, the working efficiency is improved, and the labor cost is reduced. The first lead uses the common conductive cable, only needs to expose one end contacted with liquid to the external environment, has simple and easily obtained materials, is convenient to maintain and use, has low cost and is little influenced by the environment.
As a second embodiment of the present invention, there is provided a liquid control system which is substantially the same as that of the first embodiment except that the liquid control system of the second embodiment has only one first wire, 1 liquid inlet in the tank 3, and the liquid inlet device has only one liquid inlet tank, one liquid inlet pump and one valve. By injecting liquid from the liquid inlet tank into the tank body, accurate control of the liquid volume can be achieved.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A liquid level control system for a scale-prone reactor, comprising: the liquid feeding device, a tank body (3), a first lead (1-1, 1-2), a voltage control box (5) and a PLC control cabinet (6);
the tank body (3) is provided with a liquid inlet, and the liquid inlet is used for injecting liquid into the tank body (3) through the liquid inlet; the liquid is the liquid in the production process of superfine aluminum hydroxide, and the liquid is easy to scale on the surface of the first lead;
the inner wall of the tank body (3) can conduct electricity; carbon steel or iron is selected as the inner wall of the tank body;
one end of the first lead (1-1, 1-2) extends into the tank body (3) and is not contacted with the inner wall of the tank body (3), and the other end of the first lead is connected with the voltage control box (5); one end of the first lead (1-1, 1-2) in the tank body (3) is hung with a plumb, the lower end of the first lead is connected with an electrode plate or an electrode rod, and the electrode plate or the electrode rod has the plumb function; the first lead is a conductive cable; the first lead (1-1, 1-2) is provided with a lead protection sleeve (2) outside the branch line in the tank body; the first leads (1-1, 1-2) are arranged at the height of one end of the tank body according to the requirement; the number of the first wires is the same as the kind number of the injected liquid;
the voltage control box (5) is connected with the inner wall of the tank body (3) through a second wire (4), and when the liquid in the tank body (3) is in contact with the first wire, the first wires (1-1, 1-2), the liquid, the inner wall of the tank body (3), the second wire and the voltage control box (5) form a connected circuit; the voltage control box (5) comprises an intermediate relay, the intermediate relay comprises a coil, two ends of the coil are respectively connected with the first lead wires (1-1, 1-2) and the inner wall of the tank body (3), the intermediate relay comprises a normally open point, the normally open point is connected with the PLC control cabinet (6), and when a closed circuit is formed, the normally open point is closed and a closing signal is sent to the PLC control cabinet (6);
the PLC control cabinet (6) is connected with the liquid inlet device and the voltage control box (5) and is used for judging the height of liquid in the tank body (3) according to the connected circuit and controlling the liquid injection and stop of the liquid inlet device;
the PLC control cabinet (6) comprises a control module, the control module receives a normally open point closing signal of the voltage control box (5) and simultaneously sends out a signal to control the closing and opening of the liquid inlet device, and when the liquid inlet device is switched from opening to closing, the control module enters a locking state and does not allow the liquid inlet device to be opened again.
2. The liquid level control system according to claim 1, wherein the liquid inlet device comprises a plurality of liquid inlet tanks (10, 11), and the liquid inlet on the tank body (3) is a plurality of liquid inlet ports, and each liquid inlet tank (10, 11) corresponds to one liquid inlet port.
3. The liquid level control system according to claim 2, characterized in that the liquid inlet device further comprises a plurality of liquid inlet pumps (9-1, 9-2), the liquid inlet pumps (9-1, 9-2) being arranged between the liquid inlet tanks (10, 11) and the liquid inlet, one liquid inlet tank (10, 11) corresponding to each liquid inlet pump (9-1, 9-2); each liquid inlet pump (9-1, 9-2) is connected with the PLC control cabinet (6) in a communication way, and is controlled by the PLC control cabinet (6) to pump or stop pumping liquid into the tank body (3).
4. A liquid level control system according to claim 3, characterized in that the liquid inlet means further comprises a plurality of valves (8-1, 8-2), the valves (8-1, 8-2) being arranged between the liquid inlet pump (9-1, 9-2) and the liquid inlet, one liquid inlet pump (9-1, 9-2) for each valve (8-1, 8-2); each valve (8-1, 8-2) is connected with the PLC control cabinet (6) in a communication way and is controlled by the PLC control cabinet (6) to open or close.
5. The liquid level control system according to claim 1, characterized in that the voltage control box (5) comprises a transformer, both ends of which are connected to the first wire (1-1, 1-2) and the inner wall of the tank (3), respectively.
6. A system for automatically blending a mixed liquor for an easily fouled reactor, comprising:
the fluid level control system and stirring device (12) of any one of claims 1-5;
the PLC control cabinet (6) of the liquid level control system is connected with the stirring equipment (12) in a communication manner and is used for controlling the running and stopping of the stirring equipment (12);
the liquid level control system comprises more than two first leads (1-1, 1-2) with different heights, wherein a PLC control cabinet (6) controls the liquid inlet device to inject more than two liquids into the tank body (3), and the quantity of the injected liquids is consistent with that of the first leads; the height of the 1 st liquid in the tank body (3) is equal to the height of one end of the first lead at the lowest position in the tank body (3), the height of the n-th liquid in the tank body (3) is equal to the difference between the heights of the n-th low position and the n-1-th low position at one end of the first lead in the tank body (3), and n is a natural number greater than 1.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143682A1 (en) * | 1983-10-04 | 1985-06-05 | Hager Electro S.A. | Automatic circuit breakers, particularly earth fault and overload circuit breakers |
| CN202367858U (en) * | 2011-11-28 | 2012-08-08 | 中铁十八局集团第三工程有限公司 | Bentonite pulping control system for shield construction |
| CN204816321U (en) * | 2015-07-13 | 2015-12-02 | 河南丰之源生物科技有限公司 | Multiple liquid mixing device |
| CN109708840A (en) * | 2019-01-07 | 2019-05-03 | 北京云梦智慧科技有限公司 | Water flow test device based on the communication of Internet of Things water meter |
-
2021
- 2021-05-24 CN CN202110563115.1A patent/CN113230934B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0143682A1 (en) * | 1983-10-04 | 1985-06-05 | Hager Electro S.A. | Automatic circuit breakers, particularly earth fault and overload circuit breakers |
| CN202367858U (en) * | 2011-11-28 | 2012-08-08 | 中铁十八局集团第三工程有限公司 | Bentonite pulping control system for shield construction |
| CN204816321U (en) * | 2015-07-13 | 2015-12-02 | 河南丰之源生物科技有限公司 | Multiple liquid mixing device |
| CN109708840A (en) * | 2019-01-07 | 2019-05-03 | 北京云梦智慧科技有限公司 | Water flow test device based on the communication of Internet of Things water meter |
Non-Patent Citations (1)
| Title |
|---|
| 林锦实，宋艳丽著.《检测技术及仪表》.北京：机械工业出版社,2017,第165-166页. * |
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