CN210123298U - Improved built-in type balance container steam drum liquid level measurement system - Google Patents
Improved built-in type balance container steam drum liquid level measurement system Download PDFInfo
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- CN210123298U CN210123298U CN201921364881.XU CN201921364881U CN210123298U CN 210123298 U CN210123298 U CN 210123298U CN 201921364881 U CN201921364881 U CN 201921364881U CN 210123298 U CN210123298 U CN 210123298U
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Abstract
The utility model discloses an improved built-in type balance container steam pocket liquid level measuring system, which comprises a condensate water return pipe, a condensing tank, a positive pressure side sampling pipe, a differential pressure transmitter, a balance container, a negative pressure side sampling pipe, a control system and a condensing tank steam supply pipe; the steam drum pressure measuring system comprises a steam drum, a condensate water return pipe, a pressure difference transmitter, a pipeline, a balance container, a control system and a built-in balance container liquid level meter, wherein the steam drum is positioned outside the steam drum, one end of the condensate water return pipe is communicated with the bottom of the steam drum, one end of a positive pressure side sampling pipe is communicated with the positive pressure side of the pressure difference transmitter, the other end of the positive pressure side sampling pipe and the other end of the condensate water return pipe are inserted into the steam drum and then communicated with the bottom of the balance container through the pipeline and the pipeline, the negative pressure side of the pressure difference transmitter is communicated with the steam drum through the negative pressure side sampling pipe, the side surface of the steam drum is communicated with the side surface of the balance container through the steam supply pipe of the steam.
Description
Technical Field
The utility model belongs to boiler drum water level detection instrument field relates to a built-in balanced container drum liquid level measurement system of modified.
Background
The steam drum liquid level is an important parameter for normal operation of the subcritical boiler, and it is the core work of the boiler operation to ensure that the steam drum liquid level is in a normal range under different working conditions.
The monitoring means commonly used for the steam drum liquid level at present comprises a bicolor liquid level meter, an electric contact liquid level meter, a double-chamber/single-chamber balance container liquid level meter and the like, wherein the single-chamber balance container is a commonly used steam drum liquid level monitoring device at present and is divided into a built-in type balance container liquid level meter and an external balance container liquid level meter according to different installation positions of the balance container.
The built-in balance container liquid level meter arranges the balance container in the steam pocket, thereby ensuring that liquid water in pressure conduits at the positive pressure side and the negative pressure side of the liquid level meter and working media in the steam pocket are kept at the same pressure and temperature state, and providing simple and reliable correction parameters for liquid level calculation.
When the operation of the unit is abnormal and the pressure of the steam drum drops suddenly, the liquid water in the balance container and the sampling pipe at the positive pressure side is quickly vaporized because the temperature change of the liquid in the balance container lags behind the pressure change, and the condensation process of the steam in the condensation tank is slow, the liquid water lost by the balance container and the positive pressure side sampling pipe is not enough to be supplemented in a short time, and the connecting pipe between the conventional built-in balance container and the external condensing tank is horizontally arranged, so that the water supplementing process to the balance container can be realized only when the liquid level in the condensing tank is higher than that of the connecting pipe, meanwhile, the connecting pipe has the functions of supplying steam to the condensing tank by the steam pocket and supplementing water to the balance container by the condensing tank, when steam drum parameters are changed violently, the maintenance of liquid level in the balancing container is not facilitated, and then the inaccurate or even impossible monitoring of steam drum liquid level measurement is caused, and great hidden danger is caused to the safe and reliable operation of the boiler.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a built-in balanced container steam pocket liquid level measurement system of modified, this system can effectively solve the inaccurate problem of water level measurement that built-in balanced container level gauge appears when boiler steam pocket pressure suddenly drops.
In order to achieve the purpose, the improved built-in type balance container steam pocket liquid level measuring system comprises a condensate water return pipe, a condensing tank, a positive pressure side sampling pipe, a differential pressure transmitter, a balance container, a negative pressure side sampling pipe, a control system and a condensing tank steam supply pipe;
the condensing tank is located outside the steam pocket, one end of the condensed water backflow pipe is communicated with the bottom of the condensing tank, one end of the positive pressure side sampling pipe is communicated with the positive pressure side of the differential pressure transmitter, the other end of the positive pressure side sampling pipe and the other end of the condensed water backflow pipe are inserted into the steam pocket and then communicated with the bottom of the balance container through a pipeline and a pipe, the negative pressure side of the differential pressure transmitter is communicated with the steam pocket through the negative pressure side sampling pipe, the side face of the condensing tank is communicated with the side face of the balance container through the steam supply pipe of the condensing tank, and the output end of the differential pressure transmitter is communicated with the control system.
And the water replenishing pipe is communicated with the top of the condensing tank.
The device also comprises a positive pressure side standby sampling tube communicated with the side surface of the condensation tank.
First stop valves are arranged on the steam supply pipe of the condensing tank, the condensate water return pipe, the positive pressure side sampling pipe and the negative pressure side sampling pipe.
And second stop valves are arranged on the water replenishing pipe of the condensing tank and the standby sampling pipe on the positive pressure side.
The control system is a PLC system or a DCS system.
The utility model discloses following beneficial effect has:
modified built-in balance container steam pocket liquid level measurement system when concrete operation, through increase the comdenstion water back flow in the bottom at external condensate tank, when the steam pocket pressure reduction caused liquid water vaporization in the balance container, the comdenstion water that accumulates in the condensate tank supplyed in balance container and malleation side sample tube through the comdenstion water back flow to maintain the stability of malleation side water level, thereby guarantee the accurate monitoring of steam pocket water level, effectively solve the inaccurate problem of water level measurement that built-in balance container level gauge appears when boiler steam pocket pressure suddenly drops.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a steam pocket, 2 is a balance container, 3 is a steam supply pipe of a condensing tank, 4 is a water replenishing pipe of the condensing tank, 5 is a positive pressure side standby sampling pipe, 6 is the condensing tank, 7 is a condensed water return pipe, 8 is the positive pressure side sampling pipe, 9 is a differential pressure transmitter, and 10 is the negative pressure side sampling pipe.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the improved built-in type balance container drum liquid level measuring system of the present invention comprises a condensate water reflux pipe 7, a condensate tank 6, a positive pressure side sampling pipe 8, a differential pressure transmitter 9, a balance container 2, a negative pressure side sampling pipe 10, a control system and a condensate tank steam supply pipe 3; the condensing tank 6 is located outside the steam pocket 1, one end of a condensed water backflow pipe 7 is communicated with the bottom of the condensing tank 6, one end of a positive pressure side sampling pipe 8 is communicated with a positive pressure side of a differential pressure transmitter 9, the other end of the positive pressure side sampling pipe 8 and the other end of the condensed water backflow pipe 7 are inserted into the steam pocket 1 and then communicated with the bottom of the balance container 2 through a pipeline and a pipe, the negative pressure side of the differential pressure transmitter 9 is communicated with the steam pocket 1 through a negative pressure side sampling pipe 10, the side face of the condensing tank 6 is communicated with the side face of the balance container 2 through a condensing tank steam supply pipe 3, the output end of the differential pressure transmitter 9 is communicated with a control system, and the control system is a PLC system or a DCS system.
The utility model discloses still include the condensing tank moisturizing pipe 4 that is linked together with the top of condensing tank 6 and the reserve sampling tube of malleation side 5 that is linked together with the side of condensing tank 6.
First stop valves are arranged on the steam supply pipe 3 of the condensing tank, the condensed water return pipe 7, the positive pressure side sampling pipe 8 and the negative pressure side sampling pipe 10; and second stop valves are arranged on the water replenishing pipe 4 of the condensation tank and the standby sampling pipe 5 on the positive pressure side.
In the boiler normal operating process, steam pocket 1 is inside to be full of saturated water and saturated steam, and there is the vapour-liquid interface of relatively stable, surge tank 2 installs inside steam pocket 1, and be connected to differential pressure transmitter 9's malleation side interface through malleation side sampling pipe 8, the one end direct arrangement of negative pressure side sampling pipe 10 is in steam pocket 1, the other end of negative pressure side sampling pipe 10 is connected to differential pressure transmitter 9's negative pressure side interface, differential pressure transmitter 9 converts positive negative pressure side differential pressure into the signal of telecommunication and transmits to control system in, control system obtains the liquid level of steam pocket 1 according to this signal of telecommunication calculation.
Steam gets into in condensing tank 6 through condensing tank steam supply pipe 3, because condensing tank 6 arranges in the normal atmospheric temperature environment outside steam pocket 1, steam condenses to liquid water and gathers in condensing tank 6, when the liquid level in balanced container 2 is less than the liquid level in condensing tank 6, liquid water flows to balanced container 2 under the action of gravity in condensing tank 6 by oneself, when the liquid level reaches steam pocket 1 level gauge design range upper limit in balanced container 2, the moisturizing of condensing tank 6 overflows to inside steam pocket 1 to realize keeping stable liquid level throughout in level gauge malleation side sampling pipe 8, guarantee the accuracy of level gauge.
When the unit is started to supply water in a cold state, the boiler is not ignited at the moment, no saturated steam exists in the steam pocket 1, in order to ensure that the water level of the steam pocket 1 can be monitored, water is supplied into the condensing tank 6 and the balance container 2 through the water supply pipe 4 of the condensing tank, the water can be supplied into pipelines such as desalted water, condensed water or boiler water supply, and the like, and proper liquid water can also be injected by adopting a manual method.
When the balance container 2 or the positive pressure side sampling pipe 8 cannot be put into use due to reasons, the positive pressure side standby sampling pipe 5 is connected to the positive pressure side of the differential pressure transmitter 9 so as to enhance the usability of the drum liquid level measurement system, and when the standby positive pressure side standby sampling pipe 5 is adopted, the system is equivalent to an external balance container liquid level measurement system.
The utility model discloses well condensing tank supplies steam pipe 3 and condensate water back flow 7 independent layout for steam drum 1 is all accomplished through independent pipeline to the steam supply of condensing tank 6, condensing tank 6 to balanced container 2 and the condensate water replenishment of malleation side sampling pipe 88, and each other does not influence, with the replenishment of liquid water in the balanced container 2 when accomplishing 1 pressure variation of steam drum as fast as possible.
Meanwhile, one end of a condensate water return pipe 7 is connected to the bottom of the condensate tank 6, the other end of the condensate water return pipe 7 is connected to the lower portion of the balance container 2 and communicated with a positive pressure side sampling pipe 8 in the steam pocket 1, and all condensate liquid in the condensate tank 6 can be fully utilized.
Claims (6)
1. An improved built-in type balance container steam drum liquid level measuring system is characterized by comprising a condensate water return pipe (7), a condensate tank (6), a positive pressure side sampling pipe (8), a differential pressure transmitter (9), a balance container (2), a negative pressure side sampling pipe (10) and a condensate tank steam supply pipe (3);
the steam drum (1) is located outside the steam drum (6), one end of a condensate water backflow pipe (7) is communicated with the bottom of the condensate drum (6), one end of a positive pressure side sampling pipe (8) is communicated with a positive pressure side of a differential pressure transmitter (9), the other end of the positive pressure side sampling pipe (8) and the other end of the condensate water backflow pipe (7) are inserted into the steam drum (1) and then communicated with the bottom of the balance container (2) through a pipeline and a pipe, the negative pressure side of the differential pressure transmitter (9) is communicated with the steam drum (1) through a negative pressure side sampling pipe (10), the side face of the condensate drum (6) is communicated with the side face of the balance container (2) through a steam supply pipe (3) of the condensate drum, and the output end of the differential pressure transmitter (9) is communicated with a control system.
2. The improved built-in equalization vessel drum level measurement system as claimed in claim 1, further comprising a condensate tank water replenishment pipe (4) in communication with the top of the condensate tank (6).
3. The improved built-in equalization vessel drum level measurement system as claimed in claim 2, further comprising a positive pressure side backup sampling tube (5) in communication with the side of the condensing tank (6).
4. The improved built-in type balancing container drum liquid level measuring system according to claim 1, characterized in that stop valves are arranged on the steam supply pipe (3), the condensed water return pipe (7), the positive pressure side sampling pipe (8) and the negative pressure side sampling pipe (10) of the condensing tank.
5. The improved built-in type balancing vessel drum liquid level measuring system according to claim 3, characterized in that the stop valves are arranged on the water replenishing pipe (4) of the condensation tank and the spare sampling pipe (5) on the positive pressure side.
6. The improved built-in equalization vessel drum level measurement system of claim 1 wherein the control system is a PLC system or a DCS system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921364881.XU CN210123298U (en) | 2019-08-21 | 2019-08-21 | Improved built-in type balance container steam drum liquid level measurement system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921364881.XU CN210123298U (en) | 2019-08-21 | 2019-08-21 | Improved built-in type balance container steam drum liquid level measurement system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210123298U true CN210123298U (en) | 2020-03-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921364881.XU Active CN210123298U (en) | 2019-08-21 | 2019-08-21 | Improved built-in type balance container steam drum liquid level measurement system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210123298U (en) |
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2019
- 2019-08-21 CN CN201921364881.XU patent/CN210123298U/en active Active
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