CN211877832U - Naphthalene content on-line measuring device - Google Patents
Naphthalene content on-line measuring device Download PDFInfo
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- CN211877832U CN211877832U CN202020374473.9U CN202020374473U CN211877832U CN 211877832 U CN211877832 U CN 211877832U CN 202020374473 U CN202020374473 U CN 202020374473U CN 211877832 U CN211877832 U CN 211877832U
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Abstract
The utility model provides an online naphthalene content detection device, which comprises a main pipe, a branch pipe and a controller, wherein the main pipe and the branch pipe are connected in parallel; a first electric ball valve and a second electric ball valve are embedded on the branch pipe, and a temperature measuring component is arranged on the branch pipe between the first electric ball valve and the second electric ball valve, wherein the temperature measuring component comprises a temperature control relay, an electric stirrer and a thermocouple; the first electric ball valve, the second electric ball valve, the temperature control relay, the electric stirrer and the thermocouple are respectively and electrically connected with the controller. The naphthalene content online detection device can be embedded into a pipeline through which a naphthalene-containing product to be detected flows, the flowing of the naphthalene-containing product is not hindered, special sampling is not needed when the naphthalene content is measured, online detection is realized, and safety and high efficiency are realized; after the measurement, the crystallized naphthalene can be heated to restore the fluidity, avoiding the waste of the sample.
Description
Technical Field
The utility model relates to a chemical industry detection device, concretely relates to detect device of chemical content.
Background
At present, methods for detecting naphthalene content include determination of naphthalene content by measuring crystallization point of naphthalene, and gas chromatography. The two detection methods are both based on manual sampling, then the sample is sent to a laboratory for determination, and the sample is poured into a special naphthalene recycling bin after the determination is finished. Therefore, the labor force and the samples are wasted, and the environment can be polluted due to improper sample collection and recovery, so that adverse effects are further brought to safety.
Disclosure of Invention
The utility model provides a naphthalene content on-line measuring device solves the problem that exists among the prior art to a certain extent at least.
The utility model provides an online naphthalene content detection device, which comprises a main pipe, a branch pipe and a controller, wherein the main pipe and the branch pipe are connected in parallel; a first electric ball valve and a second electric ball valve are embedded on the branch pipe, and a temperature measuring component is arranged on the branch pipe between the first electric ball valve and the second electric ball valve, wherein the temperature measuring component comprises a temperature control relay, an electric stirrer and a thermocouple; the first electric ball valve, the second electric ball valve, the temperature control relay, the electric stirrer and the thermocouple are respectively and electrically connected with the controller. The main pipe can be embedded into a pipeline through which a naphthalene-containing product to be detected flows, so that the naphthalene-containing product to be detected flows through the main pipe and the branch pipes. When the naphthalene content needs to be detected, the first electric ball valve and the second electric ball valve are closed through the controller, so that a part of naphthalene-containing products to be detected are limited on the branch pipe between the first electric ball valve and the second electric ball valve; the naphthalene-containing product is gradually cooled, and when the temperature is reduced to a threshold value (for example, 81 ℃), the temperature control relay is operated to stop stirring of the electric stirrer; and the controller measures the crystallization point of the naphthalene-containing product through the thermocouple, and obtains the naphthalene content in the naphthalene-containing product to be detected according to the relationship between the crystallization point and the naphthalene content.
Furthermore, a close-wound temperature control pipe is arranged on the outer side of the branch pipe between the first electric ball valve and the second electric ball valve, a third electric ball valve is arranged at the inlet of the close-wound temperature control pipe, and a fourth electric ball valve is arranged at the outlet of the close-wound temperature control pipe; and the third electric ball valve and the fourth electric ball valve are respectively and electrically connected with the controller. Heat transfer media such as cold water and steam can be introduced into the close-wound temperature control pipe; when cold water is introduced, the heat can be absorbed, so that the naphthalene-containing product to be detected is cooled rapidly; when steam is introduced, heat can be released, thereby melting the crystallized naphthalene. And under the control of the controller, the third electric ball valve and the fourth electric ball valve are used for controlling the on-off of the heat transfer medium.
Further, a heat-insulating jacket is arranged on the outer side of the main pipe, and a heat-insulating jacket is arranged on the outer side of the branch pipe except the part between the first electric ball valve and the second electric ball valve. The insulating jacket can maintain the temperature and maintain the flowability of the naphthalene containing product, since naphthalene is easily crystallized at a low temperature. In order to measure the crystallization point of naphthalene conveniently, the wrapping range of the heat-insulating jacket does not include the branch pipe part where the temperature measuring component is located.
Further, the first electric ball valve and the second electric ball valve are both electric heat-preservation ball valves, and a jacket of the first electric ball valve and a jacket of the second electric ball valve are respectively connected with the heat-preservation jacket through pipelines. In this way, the jacket of the first electric ball valve, the jacket of the second electric ball valve, and the heat-insulating jacket can share a heat transfer medium (e.g., steam).
The utility model has the advantages that: the naphthalene content online detection device can be embedded into a pipeline through which a naphthalene-containing product to be detected flows, the flowing of the naphthalene-containing product is not hindered, special sampling is not needed when the naphthalene content is measured, online detection is realized, and safety and high efficiency are realized; after the measurement, the crystallized naphthalene can be heated to restore the fluidity, avoiding the waste of the sample.
Drawings
Fig. 1 is a schematic structural diagram of an online naphthalene content detection device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a branch pipe portion between a first electric ball valve and a second electric ball valve in an online naphthalene content detecting device according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of an electric stirrer in the naphthalene content online detection device according to an embodiment of the present invention.
Fig. 4 is a schematic connection diagram of each electrical component in the naphthalene content online detection device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of the naphthalene content online detection device according to an embodiment of the present invention when the first electric ball valve and the second electric ball valve are both closed.
The reference signs explain: 100. a main pipe, 101, a main pipe inlet flange, 102, a main pipe outlet flange, 200, a branch pipe, 201, a branch pipe between a first electric ball valve and a second electric ball valve, 202, a branch pipe connecting flange, 203, a branch pipe connecting flange, 300, an insulating jacket, 301, an insulating jacket outlet, 302, an insulating jacket inlet, 303, an insulating pipe, 400, a first electric ball valve, 401, an electric actuator, 500, a second electric ball valve, 501, an electric actuator, 601, a temperature control relay, 6011, a remote transmission mechanism, 602, an electric stirrer, 60201, an explosion-proof motor, 60202, a motor shaft, 60203, a back wire, 60204, a back plate, 60205, a first heat-insulating gasket, 60206, a magnetic steel, 60207, a spacer, 60208, a second heat-insulating gasket, 60209, a first gasket, 60210, a machine base, 60211, a second gasket, 60212, a support sleeve, 60213, a stirring blade, 60214, a pin 60215, a pin 60216, a first shaft sleeve, 60217. the device comprises a first shaft sleeve seat 60218, a rotor 60219, a key 60220, a locking nut 60221, a second shaft sleeve 60222, a second shaft sleeve seat 60223, a machine body 60224, a motor junction box 603, a thermocouple 6031, a remote transmission device 701, a heat preservation pipe inlet 702, a third electric ball valve 7021, an electric actuating mechanism 703, a close-wound temperature control pipe 704, a heat preservation pipe 705, a fourth electric ball valve 7051, an electric actuating mechanism 706, a heat preservation pipe outlet 801, a power distribution cabinet 802 and a controller.
Detailed Description
As shown in fig. 1, the utility model discloses an online naphthalene content detection device, including being responsible for 100, branch pipe 200, controller 802, be responsible for 100 and branch pipe 200 and connect in parallel, the diameter of branch pipe 200 can be less than being responsible for 100. The branch pipe 200 is embedded with a first electric ball valve 400 and a second electric ball valve 500, the first electric ball valve 400 and the second electric ball valve 500 are respectively connected with the controller 802 through wires, and the first electric ball valve 400 and the second electric ball valve 500 are electric heat-preservation ball valves. The main pipe 100 is provided at the outer side thereof with a heat insulating jacket 300, the branch pipe 200 is provided at the outer side thereof except for a portion between the first electric ball valve 400 and the second electric ball valve 500 with the heat insulating jacket 300, and the heat insulating jacket 300 may be welded to flanges of the main pipe 100 and the branch pipe 200. An outlet 301 and an inlet 302 are arranged on the heat-insulating jacket 300, and the inlet 302 of the heat-insulating jacket can be filled with steam. Since the electric ball valve itself includes a jacket, the jacket of the first electric ball valve 400 and the jacket of the second electric ball valve 500 may be connected to the heat-insulating jacket 300 through the heat-insulating pipe 303, thereby sharing steam. The electric heat-preservation ball valve is provided with a remote transmitter, and can transmit signals to the controller 802 through the remote transmitter.
Referring to fig. 2, a close-wound temperature control pipe 703 is provided on the branch pipe 201 between the first electric ball valve 400 and the second electric ball valve 500. The close-wound temperature control tube 703 is composed of two parts, and is tightly wound around the outer wall of the branch tube 201 (only the positions for installing the temperature control relay, the electric stirrer, and the thermocouple are left vacant). The two parts of close-wound temperature control pipes 703 are gathered by a heat preservation pipe 704 to form a heat preservation pipe gathering inlet 701 and a heat preservation pipe gathering outlet 706 respectively. The insulated pipe header inlet 701 is provided with a third electric ball valve 702, and the insulated pipe header outlet 706 is provided with a fourth electric ball valve 705. The third electric ball valve 702 and the fourth electric ball valve 705 are respectively connected with the controller 802 through wires, and the third electric ball valve 702 and the fourth electric ball valve 705 respectively transmit signals to the controller 802 through remote transmitters of the third electric ball valve 702 and the fourth electric ball valve 705. A temperature measuring component is arranged on the branch pipe 201 and comprises a temperature control relay 601, an electric stirrer 602 and a thermocouple 603. The temperature-controlled relay 601, the electric stirrer 602, and the thermocouple 603 are inserted into the branch pipe 201, and are connected to the controller 802 via wires. The thermocouple 17 may be a precision remote thermocouple, and an electromotive force signal generated by the thermocouple 17 according to a change in temperature is transmitted to the controller 802 through a remote transmitter, so that a crystallization point of naphthalene can be measured.
The electric stirrer 602 may be a magnetic stirrer as shown in fig. 3. In order to conveniently arrange the electric stirrer 602, a base 60210 can be arranged on the branch pipe 201, and the base 60210 is welded on the outer wall of the branch pipe 201; the body 60223 is fixed on the base 60210 by bolts, and a second heat insulation gasket 60208 is arranged between the two parts to perform heat insulation and sealing functions. The flameproof motor 60201 is nested on the machine body 60223 through a bolt, a first heat insulation gasket 60205 is arranged between the flameproof motor 60201 and the machine body 60223, and a straight opening is arranged to ensure the concentricity of the motor 60201 and the machine body 60223. The magnetic steel 60206 is connected to the motor shaft 60202 through the back wire 60203 and the back plate 60204, and a key 60219 is arranged between the shaft 60202 and the magnetic steel 60206. Spacer 60207 is fixed to housing 60210 by hexagonal internal bolts. The support sleeve 60212 is fixed on the base 60210 with a second gasket 60211 therebetween. A first gasket 60209 is arranged between the supporting sleeve 60212 and the spacer 60207, and is embedded and restrained between the supporting sleeve 60212 and the spacer 60207 to ensure the concentricity of the supporting sleeve and the spacer. The second bushing block 60222 is fixed on the spacer 60207 by bolts, and the second bushing block 60221 is embedded on the second bushing block 60222. Also, the first bushing boss 60217 is bolted to the support sleeve 60212, and the first bushing boss 60216 is fitted to the first bushing boss 60212. The stirring shaft 60215 rotates in the two shaft sleeves, a shaft shoulder is arranged on the stirring shaft 60215, the contact surface between the shaft shoulder and the first shaft sleeve 60216 is a smooth surface, and the first shaft sleeve 60216 is stressed axially and radially. Rotor 60218 and agitator shaft 60215 are connected by keys 60219 and secured to agitator shaft 60215 by locking nut 60220. Stirring vanes 60213 are secured to stirring shaft 60215 by pins 60214.
More specifically, the electrical components may be connected as shown in fig. 4. The motor power lines of the electric actuator 401 of the first electric ball valve 400, the electric actuator 501 of the second electric ball valve 500, the electric actuator 7021 of the third electric ball valve 702 and the electric actuator 7051 of the fourth electric ball valve 705 are respectively connected with the power distribution cabinet 801; their control lines and feedback signal lines are connected to control terminals and feedback signal terminals, respectively, of the controller 802. A remote transmission mechanism 6011 of the temperature control relay 601 is connected with the power distribution cabinet 801 through a power line; a motor junction box 60224 of the electric stirrer 602 is connected with a power distribution cabinet 801 through a power cord; the remote transmission 6031 of the thermocouple 603 is connected to a feedback signal terminal of the controller 802 via a signal line.
When in use, the naphthalene content online detection device is connected to a pipeline of an original naphthalene product sampling pipe through a main pipe inlet flange 101 and a main pipe outlet flange 102. As shown in FIG. 1, the direction of the arrow is the flowing direction of the industrial naphthalene during normal production and non-detection. A steam pipeline is connected to the inlet 302 and the outlet 301 of the heat-insulating jacket, and steam flows in the heat-insulating jacket 300 in the opposite direction to the industrial naphthalene to heat the main pipe 100, the first electric ball valve 400 and the second electric ball valve 500. At this time, the first electric ball valve 400 and the second electric ball valve 500 are both in an open state; meanwhile, the third electric ball valve 702 and the fourth electric ball valve 705 are also in an opening state, and steam is introduced from the heat preservation pipe collecting inlet 701 to ensure the temperature in the branch pipe 201; magnetic stirrer 602 is in operation. The controller 802 now measures the flowing industrial naphthalene temperature via thermocouple 603.
During detection, the first electric ball valve 400 is closed through the controller 802, and then the second electric ball valve 500 is closed, namely, the two electric ball valves are closed successively; the purpose of delaying the closing of the second electric ball valve 500 is to make a certain space in the branch pipe 201 to prevent the influence of the expansion of industrial naphthalene crystals on the pipe wall. As shown in fig. 5, the medium flows only in the main pipe 100, and the medium in the branch pipe 200 is isolated by the first electric ball valve 400 and the second electric ball valve 500. At this time, the controller 802 closes the third electric ball valve 702 and the fourth electric ball valve 705 to block the steam input tightly around the temperature control pipe 703, so that the temperature in the branch pipe 201 starts to decrease (if the outside environment temperature is high, the temperature of the cooling water introduced from the heat preservation pipe inlet 701 may also decrease to accelerate the temperature of the medium). When the temperature of the medium drops to 81 ℃, that is, the temperature is slightly higher than the crystallization point temperature of the medium, the temperature control relay 601 operates to cut off the power supply to the motor 60201 of the electric stirrer 602, and the stirring is stopped. The electric stirrer 602 operates at a temperature above the crystallization point temperature in order to homogenize the temperature of the medium just to be crystallized. After the motor stirrer 602 stops stirring, the medium temperature is allowed to slowly drop so as to accurately record the medium crystallization point temperature. The precision remote thermocouple 603 feeds the medium temperature back to the controller 802, the controller 802 records the medium temperature in the period, the temperature rises again after the medium temperature drops to a certain temperature, the temperature when the temperature rises back to the highest point is the crystallization point temperature of the medium (industrial naphthalene), and the naphthalene content is obtained by comparison according to the table 1.
Therefore, the naphthalene content is measured according to the crystallization point temperature of the naphthalene product. And (3) crystallizing when the liquid naphthalene is cooled to a certain temperature, determining the crystallization point of the naphthalene when the temperature rises back to the highest point, and looking up a table according to the crystallization point of the naphthalene to obtain the corresponding naphthalene content.
After the naphthalene content is obtained, the controller 802 sends a signal to open the third electric ball valve 702 and the fourth electric ball valve 705, and steam is continuously introduced to increase the temperature of the crystallized medium to be melted; when the temperature rises to 81 ℃, the medium melts, the temperature control relay 601 acts to enable the electric stirrer 602 to operate, at this time, the controller 802 sends a signal to open the first electric ball valve 400 and the second electric ball valve 500, the medium starts to flow in the branch pipe 200, the non-detection state is recovered, and the detection is finished.
Claims (4)
1. The utility model provides a naphthalene content on-line measuring device which characterized in that: the device comprises a main pipe, a branch pipe and a controller, wherein the main pipe and the branch pipe are connected in parallel; a first electric ball valve and a second electric ball valve are embedded on the branch pipe, and a temperature measuring component is arranged on the branch pipe between the first electric ball valve and the second electric ball valve, wherein the temperature measuring component comprises a temperature control relay, an electric stirrer and a thermocouple; the first electric ball valve, the second electric ball valve, the temperature control relay, the electric stirrer and the thermocouple are respectively and electrically connected with the controller.
2. The naphthalene content online detection device according to claim 1, characterized in that: a close-wound temperature control pipe is arranged on the outer side of the branch pipe between the first electric ball valve and the second electric ball valve, a third electric ball valve is arranged at the inlet of the close-wound temperature control pipe, and a fourth electric ball valve is arranged at the outlet of the close-wound temperature control pipe; and the third electric ball valve and the fourth electric ball valve are respectively and electrically connected with the controller.
3. The naphthalene content online detection device according to claim 1 or 2, characterized in that: the outer side of the main pipe is provided with a heat-preservation jacket, and the outer side of the branch pipe except the part between the first electric ball valve and the second electric ball valve is provided with the heat-preservation jacket.
4. The naphthalene content online detection device according to claim 3, characterized in that: the first electric ball valve and the second electric ball valve are both electric heat-preservation ball valves, and a jacket of the first electric ball valve and a jacket of the second electric ball valve are respectively connected with the heat-preservation jacket through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374473.9U CN211877832U (en) | 2020-03-23 | 2020-03-23 | Naphthalene content on-line measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020374473.9U CN211877832U (en) | 2020-03-23 | 2020-03-23 | Naphthalene content on-line measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211877832U true CN211877832U (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020374473.9U Active CN211877832U (en) | 2020-03-23 | 2020-03-23 | Naphthalene content on-line measuring device |
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| Country | Link |
|---|---|
| CN (1) | CN211877832U (en) |
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2020
- 2020-03-23 CN CN202020374473.9U patent/CN211877832U/en active Active
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