CN212871413U - Condenser hot well liquid level detection device - Google Patents
Condenser hot well liquid level detection device Download PDFInfo
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- CN212871413U CN212871413U CN202021705400.XU CN202021705400U CN212871413U CN 212871413 U CN212871413 U CN 212871413U CN 202021705400 U CN202021705400 U CN 202021705400U CN 212871413 U CN212871413 U CN 212871413U
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Abstract
The utility model provides a condenser hot well liquid level detection device, which relates to the field of hot well detection and comprises a pressure taking structure and a liquid level meter, wherein the pressure taking structure comprises a positive pressure taking pipe and a negative pressure taking pipe which are respectively communicated with a hot well, the positive pressure taking pipe is positioned right below the negative pressure taking pipe, and two pressure taking ports of the liquid level meter are respectively communicated with the positive pressure taking pipe and the negative pressure taking pipe; the pressure taking structure and the liquid level meter are both provided with two sets, and are arranged at intervals in the horizontal direction, two sets of hot well liquid level detection devices utilizing the principle of the communicating vessel are arranged, the two sets of liquid level detection devices are mutually redundant, and the problem that the water level of a hot well of a unit cannot be effectively detected when a single liquid level detection device breaks down is avoided.
Description
Technical Field
The utility model relates to a hot well detection area, in particular to condenser hot well liquid level detection device.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The accurate measurement of the water level of the condenser hot well is very important for the safe and economic operation of the unit, and the strict monitoring of the water level is more important because the operation parameters change greatly in the starting and stopping processes of the unit.
When the water level of the condenser is too high to submerge the copper tube, the cooling area of the whole condenser is reduced, the vacuum value of the condenser is reduced, the condensed water is supercooled, the condensed water absorbs air, the oxygen content of the condensed water is increased, and the corrosion of the copper tube of the condenser is accelerated, so that the use safety and reliability of equipment are reduced; when the water level of the condenser rises to submerge the air pipe, the water jet air extractor can pump water, and the vacuum value of the condenser is seriously reduced; the condenser water level is low excessively, will arouse condensate pump cavitation, and direct influence condensate pump safe operation can make the condensate pump exert oneself and descend simultaneously, forces the water level of oxygen-eliminating device also and then descends, still can lead to the boiler to reduce when serious and exert oneself.
The inventor finds that balance container liquid level measurement and differential pressure transmitter liquid level measurement are commonly adopted for detecting the water level of a condenser hot well at present, but for the balance container measurement, when the liquid level height of a hot well water tank exceeds an upper limit sampling point (above an HHH alarm value), condensed water can flow back into an instrument tube on the negative pressure side, so that large deviation occurs in the measurement; for the liquid level measurement of the differential pressure transmitter, the accuracy of the differential pressure value is influenced by various factors (such as pressure, temperature, pipeline valve and container tightness), and for the liquid level measurement of the condenser hot well, the accuracy of the differential pressure value is directly influenced by factors in the aspects of condensed water forming time and the like; and when the detection device breaks down, the water level of the hot well of the unit cannot be effectively detected, and potential hidden dangers exist in the operation of the unit.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the defects that prior art exists, provide a condenser hot well liquid level detection device, set up two sets of hot well liquid level detection device that utilize the linker principle, two sets of liquid level detection device are each other redundant, when avoiding single liquid level detection device to break down, the unable effective problem that detects of unit hot well water level.
In order to realize the purpose, the following technical scheme is adopted:
a condenser hot well liquid level detection device comprises a pressure taking structure and a liquid level meter, wherein the pressure taking structure comprises a positive pressure taking pipe and a negative pressure taking pipe which are respectively communicated with a hot well, the positive pressure taking pipe is positioned right below the negative pressure taking pipe, and two pressure taking ports of the liquid level meter are respectively communicated with the positive pressure taking pipe and the negative pressure taking pipe; the pressure-taking structure and the liquid level meter are both provided with two groups and are arranged at intervals in the horizontal direction.
Further, the pressure taking structure is used for being connected with the outer wall of the hot well and horizontally extending out of the hot well along the communication position of the pressure taking structure and the hot well.
Furthermore, the positive pressure tapping pipe and the negative pressure tapping pipe are axially and horizontally arranged and are used for communicating the hot well with a pressure tapping port of the liquid level meter.
Furthermore, one end of the positive pressure tapping pipe, which is far away from the hot well, is communicated with a first pressure tapping port of the liquid level meter, and one end of the negative pressure tapping pipe, which is far away from the hot well, is communicated with a second pressure tapping port of the liquid level meter.
Further, the level gauge is a magnetic suspension level gauge, and comprises a liquid level pipe, a floater positioned in the liquid level pipe and a detection mechanism, wherein the detection mechanism is used for acquiring the position change of the floater in the liquid level pipe.
Furthermore, the pressure taking port is formed in the side walls of two ends of the liquid level pipe, and the liquid level pipe is communicated with the hot well through the pressure taking mechanism.
Further, the buoy is coaxially matched with the liquid level pipe and used for axially moving along the liquid level pipe under the action of buoyancy.
Further, the cursory is the magnetism cursory, and detection mechanism arranges the tip at the liquid level pipe for the magnetic induction intensity when acquireing the intraductal removal of magnetism cursory liquid level changes, thereby judges the relative position change of cursory and liquid level pipe.
Furthermore, the pressure measuring structures are matched with the liquid level meter in a one-to-one correspondence mode, and the two pressure measuring structures are arranged at different positions of the same horizontal height.
Further, the liquid level meters are all vertically arranged.
Compared with the prior art, the utility model has the advantages and positive effects that:
(1) the liquid level change of the condenser hot well can be detected, and a detected medium is completely isolated from the indicating mechanism by using a liquid level meter for magnetic detection, so that the sealing performance is good, the leakage of the hot well air pressure is avoided, and the device has the advantages of high reliability, good vibration resistance, simple structure, convenience in installation, free disassembly and easiness in maintenance;
(2) two sets of redundant liquid level detection device, principal and subordinate liquid level detection device are each other for stand-by, guarantee the redundant function of level gauge, and one set of liquid level detection device goes wrong at the operation in-process, and another set can seamless take over, continues to detect the hot-well liquid level, and the unit operation can not receive the influence.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
Fig. 1 is a schematic overall structure diagram of a detection apparatus in embodiment 1 of the present disclosure;
fig. 2 is a schematic structural diagram of a detection mechanism in embodiment 1 of the present disclosure.
In the figure, 1-condenser, 2-condenser hot well, 3-hot well main level gauge negative pressure open pore, 4-main level gauge negative pressure tapping pipe, 5-hot well main level gauge positive pressure open pore, 6-main level gauge positive pressure tapping pipe, 7-hot well slave level gauge negative pressure open pore, 8-slave level gauge negative pressure tapping pipe, 9-hot well slave level gauge positive pressure open pore, 10-slave level gauge positive pressure tapping pipe, 11-slave level gauge, 12-main level gauge, 13-programmable logic controller, 14-communication cable, 15-transmitter.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in this disclosure, if any, merely indicate that the directions of movement are consistent with those of the figures themselves, and are not limiting in structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present disclosure.
As introduced in the background art, when the condenser hot well liquid level measurement is performed in the prior art, factors in the aspects of condensate forming time and the like directly influence the accuracy of a differential pressure value; and when its detection device broke down, the hot well water level of its unit just can't be effectively detected, and there is potential hidden danger in the unit operation, to above-mentioned problem, this disclosure provides a condenser hot well liquid level detection device.
Example 1
In a typical embodiment of the present disclosure, as shown in fig. 1 to 2, a condenser hot well liquid level detection device is provided.
The condenser hot well liquid level has an important role in unit safety and stability operation, and in order to avoid the damage of the arranged single detection device during unit operation, the unit operation is influenced, and the liquid level measurement device is redundantly arranged.
Because there is the intercommunication pipeline between condenser high back pressure side and the low back pressure side heat well, the water in the heat well flows to the low back pressure side heat well from high back pressure side heat well, and in the in-process of establishing dynamic balance at both sides heat well liquid level, the current value of condenser heat well liquid level that the low back pressure side heat well liquid level more can be relatively accurate reaction.
In this embodiment, set up 2 level gauges that have the teletransmission function at low back pressure side heat well, 1 liquid level signal is sent to digital electric liquid control system, and another sends decentralized control system. Therefore, the redundancy function of the liquid level meter is ensured, and once one liquid level detection device fails, the other liquid level detection device can work normally, and the operation of the unit cannot be influenced.
The detection device comprises a pressure taking structure and a liquid level meter, wherein the pressure taking structure comprises a positive pressure taking pipe and a negative pressure taking pipe which are respectively communicated with the hot well, the positive pressure taking pipe is positioned right below the negative pressure taking pipe, and two pressure taking ports of the liquid level meter are respectively communicated with the positive pressure taking pipe and the negative pressure taking pipe; the pressure measuring structure and the liquid level meter are respectively provided with two groups which are arranged at intervals in the horizontal direction;
specifically, as shown in fig. 1-2, a hole is formed on the steel structure outer body of the condenser container on the left side of the low back pressure of the condenser hot well; in the present embodiment, aperture DN50 mm;
and on a vertical line below the hole, the outer body of the steel structure of the hot well of the condenser is perforated, and the center distance between the two vertical holes of the hole is 800 mm.
The pressure measuring structure is used for connecting the outer wall of the hot well and horizontally extends out of the hot well along the communication position of the pressure measuring structure and the hot well; after the holes are opened, DN50 steel pipes are welded outside along the vertical plane direction of the hole surface; the upper steel pipe forms a negative pressure pipe, and the lower steel pipe forms a positive pressure pipe; in this embodiment, the lengths of the two steel pipes are both 600mm, and the ends of the steel pipes are welded by flange pieces.
The positive pressure pipe and the negative pressure pipe are axially and horizontally arranged and are used for communicating the hot well with a pressure taking port of the liquid level meter; two pressure taking ports of one liquid level meter are in flange bolt connection with the two steel pipes, so that the two pressure taking ports are communicated with the positive pressure taking pipe and the negative pressure taking pipe;
one end that the hot well was kept away from to the malleation pressure tapping pipe communicates the first pressure tapping of level gauge, and the one end that the hot well was kept away from to the negative pressure tapping pipe communicates the second pressure tapping of level gauge.
Completing the installation of the first group of detection devices as a main detection device through the installation process, and performing the operations of opening a hole and welding a pressure tapping pipe on the steel structure on the right side of the condenser hot well in the same way;
the size of the configuration element is the same as that of the element selected in the process, and the installation of the other group of detection devices is completed to be used as the slave detection device.
For the liquid level meter, the inside of the condensing equipment has high vacuum, so the selected liquid level meter is required to be suitable for a vacuum environment, and in the embodiment, the liquid level meter is a magnetic suspension liquid level meter;
the device comprises a liquid level pipe, a floater positioned in the liquid level pipe and a detection mechanism, wherein the detection mechanism is used for acquiring the position change of the floater in the liquid level pipe;
the pressure taking port is arranged on the side walls at two ends of the liquid level pipe, and the liquid level pipe is communicated with the hot well through the pressure taking mechanism; the buoy is coaxially matched with the liquid level pipe and used for axially moving along the liquid level pipe under the action of buoyancy.
The float is a magnetic float, and the detection mechanism is arranged at the end part of the liquid level pipe and is used for acquiring the magnetic induction intensity change of the magnetic float moving in the liquid level pipe so as to judge the relative position change of the float and the liquid level pipe;
the liquid level meter works according to a buoyancy principle and a magnetic coupling principle, when the liquid level in a container to be measured rises and falls, a float in a liquid level pipe of the liquid level meter also rises and falls, permanent magnetic steel in the float is transmitted to a field transmitter through magnetic coupling, and when the liquid level rises, the output signal of the transmitter is increased; when the liquid level is reduced, the output signal of the transmitter is reduced; thereby achieving continuous measurement of the liquid level.
It can be understood that a limit switch can be additionally arranged on the liquid level pipe to realize liquid level alarm.
For the detection mechanism, a magnetic coupler can be selected, and is connected with a transmitter, and the transmitter is connected with the programmable logic controller through a communication cable; the signal of the liquid level fluctuation is transmitted to the control system through the sensor.
With the above, the working process of the condenser hot well liquid level detection device provided in this embodiment is introduced:
when the load of the unit changes in amplitude, the master level gauge 12 and the slave level gauge 11 can simultaneously detect the change in the water level.
The load of the unit fluctuates, and the amount of condensed water in the condenser 1 changes along with the fluctuation of the load; because the condenser hot well 2 volume is less, its liquid level change is very obvious.
When the liquid level changes, the liquid is pushed by the water pressure to enter a main liquid level meter positive pressure taking pipe 6 and a slave liquid level meter positive pressure taking pipe 10 through a main liquid level meter positive pressure opening 5 of the condenser hot well and a slave liquid level meter positive pressure opening 9 of the condenser hot well respectively;
because condenser 1 upper portion is in the vacuum state, the gas in main level gauge negative pressure pipe 4 and the follow level gauge negative pressure pipe 8 is extruded, then discharges from hot well main level gauge negative pressure trompil 3 and hot well follow level gauge negative pressure trompil 7 respectively, and under the effect of pressure differential, the cursory also goes up and down thereupon, and permanent magnet steel in the cursory passes through the magnetic coupling transmission signal change.
The liquid level change of the condenser hot well can be detected, the measured medium is completely isolated from the indicating mechanism by the aid of the liquid level meter for magnetic detection, sealing performance is good, and leakage of hot well air pressure is avoided.
When the liquid level changes, the transmitter 15 in FIG. 2 is subjected to the change of the pressure of the self bellows, and generates a changing electric signal of 4-20 mA; the current signal is transmitted to the programmable logic controller 13 through the communication cable 14, and is resolved through a control program to obtain the actual data of the liquid level.
Two sets of redundant liquid level detection device, principal and subordinate liquid level detection device are each other for stand-by, guarantee the redundant function of level gauge, and one set of liquid level detection device goes wrong at the operation in-process, and another set can seamless take over, continues to detect the hot-well liquid level, and the unit operation can not receive the influence.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. A condenser hot well liquid level detection device is characterized by comprising a pressure taking structure and a liquid level meter, wherein the pressure taking structure comprises a positive pressure taking pipe and a negative pressure taking pipe which are respectively communicated with a hot well, the positive pressure taking pipe is positioned right below the negative pressure taking pipe, and two pressure taking ports of the liquid level meter are respectively communicated with the positive pressure taking pipe and the negative pressure taking pipe; the pressure-taking structure and the liquid level meter are both provided with two groups and are arranged at intervals in the horizontal direction.
2. The condenser hot well liquid level detection device of claim 1, wherein the pressure taking structure is used for connecting with an outer wall of the hot well and horizontally extending to the outside of the hot well along a communication position with the hot well.
3. The liquid level detection device for the condenser hot well according to claim 2, wherein the positive pressure sampling pipe and the negative pressure sampling pipe are axially and horizontally arranged and are used for communicating the hot well with a pressure sampling port of the liquid level meter.
4. The condenser hot well liquid level detection device according to claim 1, 2 or 3, wherein one end of the positive pressure tapping pipe away from the hot well is communicated with a first pressure tapping port of the liquid level meter, and one end of the negative pressure tapping pipe away from the hot well is communicated with a second pressure tapping port of the liquid level meter.
5. The liquid level detection device for the condenser hot well is characterized in that the liquid level meter is a magnetic suspension liquid level meter and comprises a liquid level pipe, a floater positioned in the liquid level pipe and a detection mechanism, wherein the detection mechanism is used for acquiring the position change of the floater in the liquid level pipe.
6. The liquid level detection device for the condenser hot well as defined in claim 5, wherein the pressure taking ports are arranged on the side walls at two ends of the liquid level pipe, and the liquid level pipe is communicated with the hot well through the pressure taking mechanism.
7. The liquid level detection device for the condenser hot well as defined in claim 6, wherein the buoy is coaxially matched with the liquid level pipe and used for axially moving along the liquid level pipe under the action of buoyancy.
8. The liquid level detection device for the condenser hot well according to claim 5, 6 or 7, wherein the float is a magnetic float, and the detection mechanism is arranged at the end of the liquid level pipe and used for acquiring the magnetic induction intensity change of the magnetic float moving in the liquid level pipe so as to judge the relative position change of the float and the liquid level pipe.
9. The condenser hot well liquid level detection device of claim 1, wherein the pressure taking structures are matched with the liquid level meters in a one-to-one correspondence manner, and the two pressure taking structures are arranged at different positions of the same horizontal height.
10. The condenser hot well liquid level detection device of claim 9, wherein the liquid level meters are all vertically arranged.
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| CN202021705400.XU CN212871413U (en) | 2020-08-14 | 2020-08-14 | Condenser hot well liquid level detection device |
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| CN202021705400.XU CN212871413U (en) | 2020-08-14 | 2020-08-14 | Condenser hot well liquid level detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018363A (en) * | 2021-11-05 | 2022-02-08 | 山东钢铁集团日照有限公司 | Condenser hot well liquid level measurement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114018363A (en) * | 2021-11-05 | 2022-02-08 | 山东钢铁集团日照有限公司 | Condenser hot well liquid level measurement device |
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