CN209853768U - Acid evaporator - Google Patents
Acid evaporator Download PDFInfo
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- CN209853768U CN209853768U CN201920504381.5U CN201920504381U CN209853768U CN 209853768 U CN209853768 U CN 209853768U CN 201920504381 U CN201920504381 U CN 201920504381U CN 209853768 U CN209853768 U CN 209853768U
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Abstract
An acid vaporizer, comprising: an acid container for containing an acid liquor; the liquid level detection unit comprises a capacitance type liquid level detection module and is used for detecting the liquid level of the acid liquid in the acid container; a heater for heating the acid container to evaporate the acid liquid; the condenser is used for condensing acid vapor formed by evaporation; the collector is connected with the condenser and is used for collecting the condensed acid liquid; and the control unit is used for controlling the operation of the heater according to the acid liquid level. According to the utility model discloses an sour evaporimeter can terminate the evaporation process automatically, overcomes the artifical inspection of current sour evaporimeter and is difficult to in time, accurately judges the defect of acidizing fluid volume, improves work efficiency, protection operating personnel safety.
Description
Technical Field
The utility model relates to a chemistry detecting instrument field, in particular to sour evaporimeter.
Background
In the conventional acid decomposition method, the high-pressure closed decomposition method or the microwave heating decomposition method, it is necessary to add a plurality of acids for digestion treatment. The residual acid in the digestion solution not only has a certain influence on the accuracy of an analysis result, but also has a corrosion effect on instrument parts such as a graphite tube and an atomizer of an atomic absorption spectrophotometer and an atomizer and a fog chamber of ICP-MS (inductively coupled plasma mass spectrometry) and even can damage the instruments if HF remains. Therefore, it is usually necessary to perform a step of acid-driving (i.e. acid evaporation) after digesting the sample, and to evaporate the excess acid.
The acid is not driven to dry the acid solution completely, but the volume of the acid solution is reduced to 1-2 ml, even 0.5 ml. The acid evaporator in the prior art on the market is called as an acid catcher in a popular way, and no matter which heating mode is adopted, no matter what structure and shape are, heating and carrier gas purging cannot be automatically stopped when the acid evaporator is evaporated to a target volume, and operators are required to check the volume condition of acid liquid in a container one by one at any time so as to determine whether the target volume is reached. Disadvantages of existing acid evaporators include:
first, internal conditions are not readily observable. Because the container that sour evaporimeter most commonly adopted is the pipe of dispelling of teflon material, the teflon material is opaque, can't see inside from the side, can only follow the top opening part and observe to the bottom. Moreover, the digestion tube has a volume of 50-100mL or more, and is thin and long, so that it is very difficult to observe the liquid at the bottom of 1 mL or even 0.5 mL. In addition, a large amount of acid vapor is generated in the acid evaporation process, and the bottom of the digestion pipe is more difficult to see under the obstruction of the acid vapor.
Secondly, the concentrated acid vapor is extremely corrosive, and for experimenters, the experimenters look inward against the pipe filled with the acid vapor with naked eyes, so that the injury to human bodies is very large.
Thirdly, the operator needs to check the volume of the acid liquid in the container one by one at any time, which greatly increases the workload of the operator and reduces the working efficiency.
Therefore, an acid evaporator capable of automatically detecting the volume of the internal acid solution is particularly desired.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an acid evaporator to automatically terminate the evaporation process.
In order to achieve the above object, the present invention provides an acid evaporator, comprising:
an acid container for containing an acid liquor;
the liquid level detection unit comprises a capacitance type liquid level detection module and is used for detecting the liquid level of the acid liquid in the acid container;
a heater for heating the acid container to evaporate the acid liquor;
the condenser is used for condensing acid vapor formed by evaporation;
the collector is connected with the condenser and is used for collecting condensed acid liquor; and
and the control unit is used for controlling the heater to stop heating according to the acid liquid level.
Preferably, the acid vaporizer further comprises a sealing cover for sealing the acid container, and the acid container is connected to the condenser through a gas guide tube passing through the sealing cover.
Preferably, the capacitive liquid level detection module comprises a first polar plate, a second polar plate, a first lead, a second lead, an acid-resistant outer sleeve and a capacitance detection circuit; the first polar plate and the second polar plate are arranged in the acid container, and a gap is formed between the first polar plate and the second polar plate; the first polar plate and the second polar plate are respectively connected with the capacitance detection circuit through the first conducting wire and the second conducting wire; the acid-resistant outer sleeve is wrapped on the first polar plate, the second polar plate, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the first polar plate and the second polar plate.
Preferably, the first plate electrode and the second plate electrode are arranged in parallel at the bottom of the acid container.
Preferably, the capacitive liquid level detection module comprises a rod-shaped electrode, a ring-shaped electrode, a first lead, a second lead, an acid-resistant outer sleeve and a capacitance detection circuit; the rod-shaped electrode is inserted into the acid container, the annular electrode is sleeved at the bottom end of the rod-shaped electrode, and a gap is formed between the annular electrode and the rod-shaped electrode; the rod-shaped electrode and the annular electrode are respectively connected to the capacitance detection circuit through the first lead and the second lead; the acid-resistant outer sleeve wraps the rod-shaped electrode, the annular electrode, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the rod-shaped electrode and the annular electrode.
Preferably, the rod-shaped electrode is inserted to the bottom of the acid container.
Preferably, the capacitance type liquid level detection module comprises an electrode plate, an annular electrode and a capacitance detection circuit; the electrode plate is arranged below the acid container, and the annular electrode is sleeved at the bottom of the periphery of the acid container and forms a gap with the electrode plate; the capacitance detection circuit is used for detecting a capacitance value C between the electrode plate and the annular electrode.
Preferably, the electrode plate is attached to the bottom surface of the acid container.
Preferably, the control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating.
Preferably, the acid evaporator further comprises a temperature detection unit for detecting a temperature T of the acid container or the acid liquid therein, and the control unit adjusts the power of the heater according to the temperature T so as to maintain the temperature T within a predetermined temperature range.
Preferably, the acid evaporator further comprises a neutralization device and a pH monitoring device, the neutralization device and the pH monitoring device are sequentially connected to the collector, the neutralization device is used for neutralizing residual acid vapor which is not condensed and collected, and the pH monitoring device is used for monitoring the pH value of the residual acid vapor.
Preferably, the acid container is provided in plurality, the acid evaporator further comprises a carrier gas distribution device and an acid vapor collection device, the carrier gas distribution device is connected to a carrier gas source and used for distributing carrier gas to each acid container, and the acid vapor collection device is connected to the condenser and used for collecting acid vapor from each acid container to the condenser.
The beneficial effects of the utility model reside in that: the acid evaporator is provided with a capacitance type liquid level detection module for detecting the liquid level of the acid liquid in the acid container, and the control unit controls the heater to stop heating according to the liquid level of the acid liquid. Specifically, when the acid liquid level reaches the preset liquid level, the control unit controls the heater to stop heating, so that the evaporation process can be automatically stopped, the defect that the existing acid evaporator is difficult to judge the acid liquid volume timely and accurately in manual inspection is overcome, the working efficiency is improved, and the safety of operators is protected. The utility model discloses an acidizing fluid liquid level in the capacitanc liquid level detection module detection sour container is suitable for the accurate trace liquid that detects sour container bottom 1 ml even 0.5 ml.
The apparatus of the present invention has other features and advantages which will be apparent from or are set forth in more detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments of the present invention with reference to the attached drawings, in which like reference numerals generally represent like parts in exemplary embodiments of the present invention.
Fig. 1 shows a schematic view of an acid evaporator according to a first exemplary embodiment of the present invention;
fig. 2 shows a schematic view of a capacitive liquid level detection module of an acid evaporator according to a first exemplary embodiment of the present invention;
fig. 3 shows a schematic view of a capacitive liquid level detection module of an acid evaporator according to a second exemplary embodiment of the present invention;
fig. 4 shows a schematic view of a capacitive liquid level detection module of an acid evaporator according to a third exemplary embodiment of the present invention.
Description of reference numerals:
1-carrier gas source, 2-filter, 3-carrier gas distribution device, 4-heater, 5-acid container, 6-liquid level detection unit, 7-temperature detection unit, 8-acid vapor collection device, 9-condenser, 10-collector, 11-neutralization device, 12-pH monitoring device, and 13-pH sensor;
51-acid solution, 52-sealing cover, 53-air duct and 54-air duct;
61-acid-resistant jacket, 62-first lead, 63-first polar plate, 64-second polar plate, 65-rod electrode, 66-ring electrode, 67-second lead, 68-polar plate, and 69-ring electrode.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention have been illustrated in the accompanying drawings, it is to be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The embodiment of the utility model provides an acid evaporator, include:
an acid container for containing an acid liquor;
the liquid level detection unit comprises a capacitance type liquid level detection module and is used for detecting the liquid level of the acid liquid in the acid container;
a heater for heating the acid container to evaporate the acid liquid;
the condenser is used for condensing acid vapor formed by evaporation;
the collector is connected with the condenser and is used for collecting the condensed acid liquid; and
and the control unit is used for controlling the heater to stop heating according to the acid liquid level.
According to the utility model discloses sour evaporimeter passes through the sour container of heater heating with the acidizing fluid in the sour container of evaporation, and the sour vapour that the evaporation formed is collected by the collector after the condenser condensation. Particularly, the acid evaporator is provided with a capacitance type liquid level detection module for detecting the acid liquid level in the acid container, the control unit controls the operation of the heater according to the acid liquid level, and when the acid liquid level reaches a preset liquid level, the control unit controls the heater to stop heating, so that the evaporation process can be automatically stopped, the defect that the existing acid evaporator is difficult to judge the acid liquid volume timely and accurately in a manual patrol mode is overcome, the working efficiency is improved, and the safety of operators is protected. The embodiment of the utility model provides an adopt capacitanc liquid level detection module to detect the acidizing fluid liquid level in the sour container, be suitable for the accurate trace liquid that detects sour container bottom 1 ml even 0.5 ml.
In one embodiment, the acid vaporizer further comprises a sealing cap for sealing the acid container, the acid container being connected to the condenser by a gas-guide tube passing through the sealing cap.
The acid container is preferably made of teflon (polytetrafluoroethylene and PTFE), and has the advantages of high temperature resistance, low temperature resistance, corrosion resistance, non-adhesion and the like. The sealing cover is used for sealing the acid container, and the acid container is connected with the condenser through an air guide pipe penetrating through the sealing cover. The acid vapor formed by evaporation is condensed by passing through the gas-guide tube of the sealing cover into the condenser. The material of the sealing cover and the air duct is preferably Teflon. The sealing cover can be of a plug type or a threaded connection type.
In one embodiment, the capacitive liquid level detection module comprises a first polar plate, a second polar plate, a first lead, a second lead, an acid-resistant outer sleeve and a capacitance detection circuit; the first polar plate and the second polar plate are arranged in the acid container, and a gap is formed between the first polar plate and the second polar plate; the first polar plate and the second polar plate are respectively connected with the capacitance detection circuit through a first lead and a second lead; the acid-resistant outer sleeve wraps the first polar plate, the second polar plate, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the first polar plate and the second polar plate.
Specifically, the first plate and the second plate have a gap therebetween so as to be insulated from each other, and both plates of the capacitor may be formed. The first polar plate and the second polar plate are respectively connected with the capacitance detection circuit through a first lead and a second lead. The acid-resistant outer sleeve wraps the first polar plate, the second polar plate, the first lead and the second lead. The acid-resistant jacket can be made of acid-resistant materials such as PTFE, PFA or FEP, and the electrode and the lead are prevented from being corroded due to direct contact with acid liquor. In particular, the acid-resistant outer sleeve may include two independent portions respectively wrapping the first plate and the first lead and the second plate and the second lead to insulate the first plate and the first lead from the second plate and the second lead. Or the acid-resistant outer sleeve can integrally wrap the first polar plate, the second polar plate, the first lead and the second lead and insulate the first polar plate and the first lead from the second polar plate and the second lead. The first and second wires wrapped by the acid resistant outer jacket may be connected to the capacitance detection circuit through the sealing cap.
When the acid evaporator works, the first polar plate and the second polar plate which are wrapped by the acid-resistant outer sleeve are arranged in the acid container and are immersed by the acid liquor. And as the acid liquid is gradually evaporated, the liquid level of the acid liquid is gradually reduced, and the capacitance value C between the first polar plate and the second polar plate is gradually reduced. The capacitance detection circuit detects a capacitance value C between the first polar plate and the second polar plate, the control unit compares the capacitance value C with a preset capacitance threshold value C0, and when the capacitance value C is less than or equal to C0, the heater is controlled to stop heating, so that acid liquor with a preset volume (or liquid level) is guaranteed to be remained in the acid container.
In one embodiment, the first plate and the second plate electrode are arranged at the bottom of the acid container in parallel to detect trace acid liquid.
The existing liquid level detection devices comprise a floating ball type liquid level transmitter, a magnetic liquid level transmitter, a drop-in type liquid level transmitter, a magnetostrictive liquid level transmitter, a servo liquid level transmitter, an ultrasonic liquid level transmitter, a radar liquid level transmitter and the like, and are suitable for liquid level detection of a large amount of liquid or are required to be in direct contact with the liquid. For the acid evaporator, the volume of the acid solution needs to be evaporated to 1-2 ml, even 0.5 ml, and the concentrated nitric acid and the concentrated HF acid at high temperature have strong corrosivity, so that the use of the conventional liquid level detection device is greatly limited, and the conventional liquid level detection device cannot perform accurate liquid level detection on high-temperature strong acid with a trace volume. The utility model discloses a capacitanc liquid level detection module adopts corrosion-resistant material parcel electrode and wire, but non-contact detection electric capacity change and then judge the acidizing fluid volume, and it is high to detect the precision, can realize the automatic termination of sour evaporimeter.
In one embodiment, the capacitance type liquid level detection module comprises a rod-shaped electrode, a ring-shaped electrode, a first lead, a second lead, an acid-resistant outer sleeve and a capacitance detection circuit; the rod-shaped electrode is inserted into the acid container, the annular electrode is sleeved at the bottom end of the rod-shaped electrode, and a gap is formed between the annular electrode and the rod-shaped electrode; the rod-shaped electrode and the annular electrode are respectively connected with the capacitance detection circuit through a first lead and a second lead; the acid-proof outer sleeve wraps the rod-shaped electrode, the annular electrode, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the rod-shaped electrode and the annular electrode.
Specifically, the rod-shaped electrode is inserted into the acid container, the annular electrode is sleeved at the bottom end of the rod-shaped electrode, and a gap is formed between the annular electrode and the rod-shaped electrode, so that the annular electrode and the rod-shaped electrode are insulated from each other, and the annular electrode and the rod-shaped electrode can form two poles of the capacitor. The acid-resistant jacket wraps the rod-shaped electrode, the annular electrode, the first lead and the second lead, and can be made of acid-resistant materials such as PTFE, PFA or FEP, so that the electrode and the leads are prevented from being corroded due to direct contact with acid liquor, and the rod-shaped electrode, the first lead, the annular electrode and the second lead are insulated from each other. The first and second wires wrapped by the acid resistant outer jacket may be connected to the capacitance detection circuit through the sealing cap.
When the acid evaporator works, the rod-shaped electrode and the annular electrode which are wrapped by the acid-resistant outer sleeve are arranged in the acid container and are immersed by the acid liquor. And along with the gradual evaporation of the acid liquor, the liquid level of the acid liquor is gradually reduced, and the capacitance value between the rod-shaped electrode and the annular electrode is gradually reduced. The capacitance detection circuit detects a capacitance value C between the rod-shaped electrode and the annular electrode, and the control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating when the acid container is in the acid container, so as to ensure that the preset volume (or liquid level) of the acid liquid is remained in the acid container.
In one embodiment, a rod electrode is inserted into the bottom of the acid container.
In one embodiment, the capacitance type liquid level detection module comprises an electrode plate, an annular electrode and a capacitance detection circuit; the electrode plate is arranged below the acid container, the annular electrode is sleeved at the bottom of the periphery of the acid container, and a gap is formed between the annular electrode and the electrode plate; the capacitance detection circuit is used for detecting a capacitance value C between the electrode plate and the annular electrode.
Particularly, the electrode plate and the annular electrode are arranged outside the acid container, so that the acid liquor corrosion can be completely avoided. The electrode plate is arranged below the acid container, the annular electrode is sleeved at the bottom of the periphery of the acid container, a gap is formed between the annular electrode and the electrode plate, and the electrode plate and the annular electrode can form two electrodes of the capacitor.
When the acid evaporator works, the liquid level of the acid liquid gradually drops along with the continuous evaporation of the acid liquid, and the electrode plate and the ring shapeThe capacitance value C between the electrodes gradually decreases. The capacitance detection circuit detects a capacitance value C between the electrode plate and the annular electrode, and the control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating when the acid container is in the acid container, so as to ensure that the preset volume (or liquid level) of the acid liquid is remained in the acid container.
In one embodiment, the electrode plate is proximate to the bottom surface of the acid container.
In one embodiment, the acid evaporator further comprises a temperature detection unit for detecting the temperature T of the acid container or the acid liquid therein, and the control unit adjusts the power of the heater according to the temperature T so as to maintain the temperature T within a predetermined temperature range.
The temperature detection unit may include a Resistance Temperature Detector (RTD), a thermocouple, a thermistor, an infrared non-contact temperature sensor, or an optical fiber temperature sensor. The temperature sensor can be arranged in the acid container to directly detect the temperature of the acid liquid in the acid container, and can also be arranged in the heater to indirectly obtain the temperature of the acid liquid by monitoring the heating temperature of the heater (namely the temperature of the acid container).
In one embodiment, the acid evaporator further comprises a neutralization device and a pH monitoring device, wherein the neutralization device and the pH monitoring device are sequentially connected with the collector, the neutralization device is used for neutralizing residual acid steam which is not condensed and collected, and the pH monitoring device is used for monitoring the pH value of the residual acid steam.
In order to avoid environmental pollution, a neutralization device is arranged, and residual acid vapor in residual gas can be effectively neutralized. The neutralization device may comprise lye. The pH value of the neutralized residual acid vapor can be monitored in real time through the pH monitoring device, and once the monitoring value is found to be equal to or lower than a preset pH threshold value, the alkali liquor used for neutralization is consumed, the control unit controls the alarm to give an alarm to remind an operator of replacing the alkali liquor in time. The pH monitoring device can comprise a KCL solution, and preferably, the concentration of the KCL solution can be 2-4 mol/L, and more preferably 3 mol/L.
In one embodiment, the acid container is a plurality of acid containers, the acid vaporizer further comprises a carrier gas distribution device connected to a carrier gas source for distributing the carrier gas to each of the acid containers, and an acid vapor collection device connected to the condenser for collecting the acid vapor from each of the acid containers to the condenser.
When a plurality of acid containers are provided, a liquid level detection unit may be provided in each acid container, or a liquid level detection unit may be provided in only one acid container to indirectly determine the acid liquid condition of the other acid containers.
The carrier gas distribution device comprises a closed container, and a carrier gas inlet and a plurality of carrier gas outlets which are arranged on the closed container, wherein the carrier gas outlets have the same size and are uniformly distributed on the closed container, so that each carrier gas outlet has the same pressure and flow. The carrier gas inlet is connected with a carrier gas source, and the carrier gas enters the closed container through the carrier gas inlet and enters each acid container through a plurality of carrier gas outlets.
The acid vapor collecting device comprises a closed container, and a plurality of carrier gas inlets and a carrier gas outlet which are arranged on the closed container, wherein the carrier gas inlets have the same size and are uniformly distributed on the closed container, so that each carrier gas inlet has the same pressure and flow. Each carrier gas inlet is connected with an acid container, and acid vapor is collected in the closed container and then enters the condenser through the carrier gas outlet.
In one embodiment, the heater may be of a resistance wire heated graphite thermal conductivity type, a resistance wire heated metal block thermal conductivity type, a resistance wire heated air thermal conductivity type, or an infrared radiation type. The specific form of the heater does not affect the implementation of the utility model.
Example 1
Fig. 1 shows a schematic diagram of an acid evaporator according to a first exemplary embodiment of the present invention, and fig. 2 shows a schematic diagram of a capacitive liquid level detection module of an acid evaporator according to a first exemplary embodiment of the present invention.
As shown in fig. 1 and 2, the acid evaporator according to the first exemplary embodiment of the present invention includes a filter 2, a carrier gas distribution device 3, a plurality of acid containers 5, an acid vapor collecting device 8, a condenser 9, a collector 10, a neutralization device 11, and a pH monitoring device 12, which are connected in this order, and further includes a heater 4, a liquid level detection unit 6, a temperature detection unit 7, and a control unit (not shown).
Wherein, the Filter 2 is connected to the carrier gas source 1 for filtering the carrier gas, and the Filter can be a HEPA (High efficiency particulate air Filter). A carrier gas distribution device 3 for distributing a carrier gas to each acid container 5; each acid container 5 is connected to the carrier gas distribution device 3, the acid container 5 being for containing an acid and being sealed by a sealing cover 52; an acid vapour collection device 8 is connected to each acid container 5. The condenser 9 is used for condensing acid vapor formed by evaporation; the collector 10 is connected with the condenser 9 and is used for collecting condensed acid liquor; the neutralization device 11 is used for neutralizing residual acid vapor which is not condensed and collected, and the pH monitoring device 12 is used for monitoring the pH value of the residual acid vapor and comprises a pH sensor 13.
The heater 4 is used to heat the acid container 5 to evaporate the acid liquid. The temperature detection unit 7 is used for detecting the acid liquid temperature T in the acid container 5; the liquid level detection unit 6 comprises a capacitance type liquid level detection module for detecting the liquid level of the acid liquid in the acid container 5; the control unit controls the operation of the heater according to the acid liquid level and the acid liquid temperature.
Wherein the acid container 5 is connected to the carrier gas distributing means 3 and the condenser 9 through the gas guide tube 53 and the gas guide tube 54 penetrating the sealing cover 52, respectively.
The capacitive liquid level detection module comprises a first polar plate 63, a second polar plate 64, a first lead 62, a second lead 67, an acid-proof jacket 61, and a capacitance detection circuit (not shown); the first polar plate 63 and the second polar plate 64 are arranged in the acid container 5, the first polar plate 63 and the second polar plate 64 are parallel to each other, and a gap is formed between the first polar plate 63 and the second polar plate 64; the first pole plate 63 is connected to the capacitance detection circuit through a first lead 62, and the second pole plate 64 is connected to the capacitance detection circuit through a second lead 67; the acid-resistant jacket 61 wraps the first pole plate 63, the second pole plate 64, the first lead 62 and the second lead 67, and in this embodiment, the acid-resistant jacket wraps the first pole plate 63, the second pole plate 64, the first lead 62 and the second lead 67 integrally, so that the electrodes and the leads are protected from being corroded by acid liquor, and the first pole plate and the first lead are insulated from the second pole plate and the second lead; the capacitance detection circuit is used to detect a capacitance value C between the first plate 63 and the second plate 64.
Control unit ratioComparing the capacitance value C with a predetermined capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating when the acid container is in the acid container, so as to ensure that the preset volume (or liquid level) of the acid liquid is remained in the acid container. In addition, the control unit controls the power of the heater according to the acid liquid temperature T so as to maintain the acid liquid temperature T within a preset temperature range.
Example 2
The second embodiment differs from the first embodiment in the structure of the capacitive liquid level detection module. Fig. 3 shows a schematic view of a capacitive liquid level detection module of an acid evaporator according to a second exemplary embodiment of the present invention. As shown in fig. 3, the capacitive liquid level detection module comprises a rod electrode 65, a ring electrode 66, a first lead 62, a second lead 67, an acid-proof jacket 61, and a capacitance detection circuit (not shown); the rod-shaped electrode 65 is inserted into the acid container 5, and the annular electrode 66 is sleeved at the bottom end of the rod-shaped electrode 65 and forms a gap with the rod-shaped electrode 65; the rod-like electrode 65 and the ring-like electrode 66 are connected to the capacitance detection circuit through the first lead 62 and the second lead 67, respectively; the acid-resistant outer sleeve 61 wraps the rod-shaped electrode 65, the annular electrode 66, the first lead 62 and the second lead 67, protects the electrode and the leads from being corroded by acid liquor, and insulates the rod-shaped electrode 65 and the first lead 62 from the annular electrode 66 and the second lead 67; the capacitance detection circuit detects a capacitance value C between the rod electrode 65 and the ring electrode 66.
The control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating when the acid container is in the acid container, so as to ensure that the preset volume (or liquid level) of the acid liquid is remained in the acid container.
Example 3
The third embodiment differs from the first embodiment in the structure of the capacitive liquid level detection module. Fig. 4 shows a schematic view of a capacitive liquid level detection module of an acid evaporator according to a third exemplary embodiment of the present invention. As shown in fig. 4, the capacitive liquid level detection module includes an electrode plate 68, a ring electrode 69, a capacitance detection circuit (not shown); the electrode plate 68 is arranged below the acid container 5, the annular electrode 69 is sleeved at the bottom of the periphery of the acid container 5, and a gap is formed between the annular electrode and the electrode plate 68; the capacitance detection circuit is used for detecting a capacitance value C between the electrode plate 68 and the ring electrode 69, and the electrode plate 68 and the ring electrode 69 are respectively connected with the capacitance detection circuit through leads (not shown).
The control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating when the acid container is in the acid container, so as to ensure that the preset volume (or liquid level) of the acid liquid is remained in the acid container.
While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (12)
1. An acid vaporizer, comprising:
an acid container for containing an acid liquor;
the liquid level detection unit comprises a capacitance type liquid level detection module and is used for detecting the liquid level of the acid liquid in the acid container;
a heater for heating the acid container to evaporate the acid liquor;
the condenser is used for condensing acid vapor formed by evaporation;
the collector is connected with the condenser and is used for collecting condensed acid liquor; and
and the control unit is used for controlling the heater to stop heating according to the acid liquid level.
2. The acid vaporizer of claim 1, further comprising a sealing cover for sealing the acid container, the acid container being connected to the condenser by a gas conduit passing through the sealing cover.
3. The acid evaporator of claim 1, wherein the capacitive liquid level detection module comprises a first plate, a second plate, a first wire, a second wire, an acid resistant jacket, a capacitance detection circuit; the first polar plate and the second polar plate are arranged in the acid container, and a gap is formed between the first polar plate and the second polar plate; the first polar plate and the second polar plate are respectively connected with the capacitance detection circuit through the first conducting wire and the second conducting wire; the acid-resistant outer sleeve wraps the first polar plate, the second polar plate, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the first polar plate and the second polar plate.
4. The acid evaporator of claim 3, wherein the first plate and the second plate are disposed in parallel at a bottom of the acid container.
5. The acid evaporator of claim 1, wherein the capacitive liquid level detection module comprises a rod electrode, a ring electrode, a first lead, a second lead, an acid resistant jacket, a capacitive detection circuit; the rod-shaped electrode is inserted into the acid container, the annular electrode is sleeved at the bottom end of the rod-shaped electrode, and a gap is formed between the annular electrode and the rod-shaped electrode; the rod-shaped electrode and the annular electrode are respectively connected to the capacitance detection circuit through the first lead and the second lead; the acid-resistant outer sleeve wraps the rod-shaped electrode, the annular electrode, the first lead and the second lead; the capacitance detection circuit is used for detecting a capacitance value C between the rod-shaped electrode and the annular electrode.
6. The acid vaporizer of claim 5, wherein the rod electrode is inserted into the bottom of the acid container.
7. The acid evaporator of claim 1, wherein the capacitive liquid level detection module comprises an electrode plate, an annular electrode, a capacitive detection circuit; the electrode plate is arranged below the acid container, and the annular electrode is sleeved at the bottom of the periphery of the acid container and forms a gap with the electrode plate; the capacitance detection circuit is used for detecting a capacitance value C between the electrode plate and the annular electrode.
8. The acid vaporizer of claim 7, wherein the electrode plate is proximate to a bottom surface of the acid container.
9. Acid vaporizer according to any of claims 3 to 8, wherein the control unit compares the capacitance value C with a preset capacitance threshold value C0C is less than or equal to C0And controlling the heater to stop heating.
10. The acid evaporator according to claim 1, further comprising a temperature detection unit for detecting a temperature T of the acid container or an acid liquid therein, wherein the control unit adjusts the power of the heater according to the temperature T so as to maintain the temperature T within a predetermined temperature range.
11. The acid evaporator according to claim 1, further comprising a neutralization device and a pH monitoring device, wherein the neutralization device and the pH monitoring device are sequentially connected to the collector, the neutralization device is used for neutralizing residual acid vapor which is not condensed and collected, and the pH monitoring device is used for monitoring the pH value of the residual acid vapor.
12. The acid vaporizer of claim 1, wherein the acid containers are in plurality, the acid vaporizer further comprising a carrier gas distribution device connected to a carrier gas source for distributing carrier gas to each of the acid containers and an acid vapor collection device connected to the condenser for collecting acid vapor from each of the acid containers to the condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504381.5U CN209853768U (en) | 2019-04-15 | 2019-04-15 | Acid evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920504381.5U CN209853768U (en) | 2019-04-15 | 2019-04-15 | Acid evaporator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111825141A (en) * | 2019-04-15 | 2020-10-27 | 艾默莱科技（北京）有限公司 | Acid evaporator |
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Effective date of registration: 20201201 Address after: Room 103, building C, 92 Fukang Road, Henggang community, Henggang street, Longgang District, Shenzhen City, Guangdong Province Patentee after: Emery Technology (Shenzhen) Co., Ltd Address before: 100102, 1910 floor, 19 floor, 4 building, Wangjing street, Chaoyang District, Beijing. Patentee before: AMERLAB TECHNOLOGY (BEIJING) Co.,Ltd. |