CN215065816U - Hydraulic pressure test system suitable for supercritical power station pulverized coal boiler - Google Patents
Hydraulic pressure test system suitable for supercritical power station pulverized coal boiler Download PDFInfo
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- CN215065816U CN215065816U CN202120768701.5U CN202120768701U CN215065816U CN 215065816 U CN215065816 U CN 215065816U CN 202120768701 U CN202120768701 U CN 202120768701U CN 215065816 U CN215065816 U CN 215065816U
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Abstract
The utility model discloses a hydraulic pressure test system suitable for a supercritical power station pulverized coal boiler, which comprises a booster pump; the inlet of the booster pump is communicated with the water supply tank through a water inlet pipe, and the outlet of the booster pump is communicated with the inlet of the buffer header through a water outlet pipe; the first outlet of the buffer header is communicated with the reheater system through a reheater pressure boosting pipe, and the second outlet of the buffer header is communicated with the superheater system through a superheater pressure boosting pipe. The advantages are that: the electric water feeding pump in the original system can be used for injecting water into a superheater system and a reheater system of a boiler system, and then the pressure water boosted by the booster pump is distributed to the superheater system or the reheater system through the buffer header for carrying out a hydraulic pressure test; can carry out hydrostatic test in order to verify boiler system's tightness to huge boiler system comprehensively, do not need the artifical ray that utilizes to pursue the piece inspection, reduce work load, reduce intensity of labour, efficient, moreover the utility model discloses a reform transform on original system basis, it is with low costs.
Description
The technical field is as follows:
the utility model relates to a power plant auxiliary assembly technical field, in particular to hydrostatic test system suitable for supercritical power plant pulverized coal boiler.
Background art:
the boiler hydraulic pressure test is a test carried out for testing the tightness of the boiler strength in a cold state, is an important process after the installation of a pressure-bearing part of a boiler body and before the operation, and is an important means for testing the installation quality of the pressure-bearing part and the load-bearing part of the boiler and ensuring the safe operation reliability of a boiler unit; in order to ensure the safety of equipment, the boiler hydraulic pressure test has strict requirements on the pressure increasing speed: when the boiler is subjected to an overpressure test, the water pressure is slowly increased, when the water pressure is increased to the working pressure, the pressure is temporarily increased, and the pressure is increased to the overpressure test pressure after no leakage or abnormal phenomenon is detected; that is, the boosting speed is required to be controlled as needed, and the boosting is stopped as needed.
With the national emphasis on energy conservation and consumption reduction, the steam feed water pump and the electric feed water pump are more and more configured for the production of high-capacity and high-parameter units, and the configuration greatly reduces the initial production cost; however, this arrangement has a significant disadvantage: the hydraulic test cannot be carried out after the boiler is overhauled in a grade way and the heating surface is changed in a large area, and the leakage condition of the heating surface of the boiler cannot be verified quickly and effectively; the steam-driven water feeding pump does not have the operation working condition of high pressure head and low flow, and the hydraulic pressure test only needs very small water feeding flow, but requires a higher pressure head, so the steam-driven water feeding pump does not have the condition of water pumping pressure; the electric feed water pump does not have the function of pressure regulation, and the outlet pressure is low, so that the requirement of a hydrostatic test cannot be met.
For the configuration conditions of a steam feed pump and an electric feed pump, the current method for inspecting the strength and the tightness of a boiler is to inspect a welded junction by using rays and manually visually inspect the abrasion condition; the reliability of the ray inspection is high, but the workload is large, the labor intensity is high, and the boiler system is huge, so that the whole system cannot be subjected to comprehensive ray inspection; manual visual inspection is adopted, so that the inspection efficiency is low and accidental factors are large; therefore, the reliability of each heating surface pipeline of the boiler cannot be effectively verified at present; therefore, on the premise of lower cost, the original system is fully utilized, and a set of safe, reliable and economic hydrostatic test system is designed, so that the hydrostatic test system has important significance.
The utility model has the following contents:
an object of the utility model is to provide a can enough satisfy boiler hydrostatic test water feeding requirement in order to accomplish hydrostatic test, and be favorable to reducing intensity of labour's the hydrostatic test system who is applicable to supercritical power plant pulverized coal boiler.
The utility model discloses by following technical scheme implement: a hydraulic pressure test system suitable for a supercritical power station pulverized coal boiler comprises an electric water feed pump, wherein a water inlet of the electric water feed pump is communicated with a water outlet of a deaerator, a water outlet of the electric water feed pump is communicated with a superheater system through a superheater pipeline, and a middle tap of the electric water feed pump is communicated with a reheater system through a reheater pipeline; the device also comprises a water supply tank, a booster pump and a buffer header; the inlet of the booster pump is communicated with the water supply tank through a water inlet pipe, and the outlet of the booster pump is communicated with the inlet of the buffer header through a water outlet pipe; a first outlet of the buffer collection box is communicated with the reheater system through a reheater pressure boosting pipe, a second outlet of the buffer collection box is communicated with the superheater system through a superheater pressure boosting pipe, a first isolation valve is arranged on the reheater pressure boosting pipe, and a second isolation valve is arranged on the superheater pressure boosting pipe; a pressure regulating pipeline is connected between the water outlet pipe and the water supply water tank, and a pressure regulating valve is arranged on the pressure regulating pipeline; pressure gauges are arranged in the superheater system, the reheater system and the water outlet of the booster pump.
Further, the booster pump is a high-pressure plunger pump.
Furthermore, a first blocking valve is arranged on the reheater pressure rising pipe at the outlet of the first isolation valve, and a second blocking valve is arranged on the superheater pressure rising pipe at the outlet of the second isolation valve.
Furthermore, a filter is arranged on the water inlet pipe.
Furthermore, a manual valve is arranged on the water inlet pipe of the inlet of the filter.
Furthermore, check valves are arranged on the superheater pipeline, the reheater pipeline and the water outlet pipe.
Further, the water outlet pipe between the inlet of the buffer header and the outlet of the adjacent check valve is a hose.
Further, the water supply device also comprises a storage water tank, wherein a water outlet of the storage water tank is communicated with the water supply water tank through a water supply pipeline, and a water supply valve is arranged on the water supply pipeline.
Furthermore, a water supply electric door and a flow sensor are arranged on the superheater pipeline, the flow sensor is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the water supply electric door.
Further, the reheater pipeline is provided with a pressure transmitter and a regulating valve, the pressure transmitter is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the regulating valve.
The utility model has the advantages that: the utility model discloses a motor feed pump in the former system can be to boiler system's superheater system and reheater system water injection, then the pressurized water after stepping up through the booster pump, distribute to superheater system or reheater system through the buffering collection case and carry out the hydrostatic test; through the utility model discloses can carry out hydrostatic test in order to verify boiler system's tightness to huge boiler system comprehensively, do not need the artifical ray that utilizes to pursue the piece inspection, reduce work load, reduce intensity of labour, efficient, moreover the utility model discloses a reform transform on original system basis, it is with low costs.
Description of the drawings:
fig. 1 is a schematic structural view of embodiment 1.
Fig. 2 is a schematic diagram of a control circuit of embodiment 1.
Fig. 3 is a schematic structural view of embodiment 2.
The parts in the drawings are numbered as follows: the device comprises an electric water feeding pump 1, a deaerator 2, a superheater pipeline 3, a superheater system 4, a reheater pipeline 5, a reheater system 6, a water feeding water tank 7, a booster pump 8, a buffer header 9, a water inlet pipe 10, a water outlet pipe 11, a reheater booster pipe 12, a superheater booster pipe 13, a first isolation valve 14, a second isolation valve 15, a pressure regulating pipeline 16, a pressure regulating valve 17, a pressure gauge 18, a first blocking valve 19, a second blocking valve 20, a filter 21, a manual valve 22, a check valve 23, a water storage tank 24, a water feeding pipeline 25, a water feeding valve 26, a water feeding electric door 27, a flow sensor 28, a controller 29, a pressure transmitter 30 and a regulating valve 31.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example 1: as shown in fig. 1 and fig. 2, the embodiment provides a hydraulic test system suitable for a supercritical power station pulverized coal boiler, which includes an electric feed pump 1, a water inlet of the electric feed pump 1 is communicated with a water outlet of a deaerator 2, a water outlet of the electric feed pump 1 is communicated with a superheater system 4 through a superheater pipeline 3, and a middle tap of the electric feed pump 1 is communicated with a reheater system 6 through a reheater pipeline 5; the inlet water of the deaerator 2 comes from the condensed water of a condensed water system, the deaerator 2 is used for heating, deaerating and treating the inlet water so as to meet the requirement of boiler inlet water, and the structure and the working principle of the deaerator 2 are the prior art and are not described again; the water treated by the deaerator 2 is sent to a superheater system 4 of the boiler through a heater pipeline 3 by an electric feed water pump 1, and also can be sent to a reheater system 6 of the boiler through a reheater pipeline 5, so that the effect of filling the superheater system 4 and the reheater system 6 with water can be realized, and preparation is made for subsequent pressure rise; the superheater pipeline 3 and the reheater pipeline 5 are both provided with check valves 23, so that the electric feed pump 1 is prevented from being damaged by backflow of high-pressure water at the outlet of the electric feed pump 1.
The superheater pipeline 3 is provided with a water supply electric door 27 and a flow sensor 28, the flow sensor 28 is electrically connected with the input end of a controller 29, and the output end of the controller 29 is electrically connected with the water supply electric door 27; in the process of injecting water into the superheater system 4, the water inlet flow is monitored in real time through the flow sensor 28 and fed back to the controller 29, and when the water inlet flow does not meet a required value, the opening degree of the water supply electric door 27 is controlled and adjusted through the controller 29 so as to meet the technological requirements; the reheater pipe 5 is provided with a pressure transmitter 30 and a regulating valve 31, the pressure transmitter 30 is electrically connected with the input end of the controller 29, and the output end of the controller 29 is electrically connected with the regulating valve 31; the water outlet pressure of the middle tap of the electric water feeding pump 1 is small, the electric water feeding pump can be used for meeting the water injection requirement of the reheater system 6 with small pressure bearing capacity, the water pressure in the reheater pipeline 5 is monitored in real time through the pressure transmitter 30 and fed back to the controller 29 in the water injection process, and when the water pressure does not meet the requirement, the opening degree of the regulating valve 31 is controlled through the controller 29, so that the water injection requirement of the reheater system 6 is met.
The device also comprises a water supply tank 7, a booster pump 8 and a buffer header 9; the booster pump 8 is a high-pressure plunger pump, and the variable-frequency speed regulation is realized through a frequency converter; the inlet of the booster pump 8 is communicated with the water supply tank 7 through a water inlet pipe 10, and the outlet of the booster pump 8 is communicated with the inlet of the buffer header 9 through a water outlet pipe 11; a first outlet of the buffer collection box 9 is communicated with the reheater system 6 through a reheater pressure-rising pipe 12, a second outlet of the buffer collection box 9 is communicated with the superheater system 4 through a superheater pressure-rising pipe 13, a first isolation valve 14 is installed on the reheater pressure-rising pipe 12, and a second isolation valve 15 is installed on the superheater pressure-rising pipe 13; when water is injected into the reheater system 6 for pressure rise, the second isolation valve 15 is closed, the first isolation valve 14 is opened, and water discharged by the booster pump 8 is sent into the reheater system 6 through the buffer header 9 and the reheater booster pipe 12; when water is injected into the superheater system 4 for boosting, the first isolation valve 14 is closed, the second isolation valve 15 is opened, and water discharged by the booster pump 8 is sent into the superheater system 4 through the buffer header 9 and the superheater booster pipe 13; a first blocking valve 19 is arranged on the reheater pressure rising pipe 12 at the outlet of the first isolation valve 14, and a second blocking valve 20 is arranged on the superheater pressure rising pipe 13 at the outlet of the second isolation valve 15; when injecting water into the reheater system 6 and stepping up, close second stop valve 20, avoid second isolating valve 15 to break down the back, the water under high pressure gets into superheater system 4 and causes the damage to the equipment in the system, and similarly, when injecting water into superheater system 4 and stepping up, close first stop valve 19, after avoiding first isolating valve 14 to break down, the water under high pressure gets into reheater system 6 and causes the damage to the equipment in the system, and then guarantees boiler system safety.
A pressure regulating pipeline 16 is connected between the water outlet pipe 11 and the water supply tank 7, and a pressure regulating valve 17 is arranged on the pressure regulating pipeline 16; the pressure regulating valve 17 in the initial state is in a fully-opened state, after the booster pump 8 is started, the working frequency of the booster pump 8 is adjusted to 25Hz, then the opening of the pressure regulating valve 17 is gradually reduced until the pressure regulating valve is closed, in the process, the outlet pressure of the booster pump 8 is gradually and slowly increased, so that the purpose of slowly performing primary boosting is achieved, the safety of a system is ensured, then the working frequency of the booster pump 8 is increased by adjusting a frequency converter, and boosting is continued until the requirement of a hydrostatic test is met; pressure gauges 18 are arranged in the superheater system 4, the reheater system 6 and the water outlet of the booster pump 8, and pressure values of the water outlets in the superheater system 4, the reheater system 6 and the booster pump 8 can be observed in real time through the corresponding pressure gauges 18 in the boosting process.
The water inlet pipe 10 is provided with the filter 21 which can filter water before entering the booster pump 8 from the water supply tank 7, filter impurities and ensure that water for carrying out a boiler system hydrostatic test meets the requirements; a manual valve 22 is arranged on the water inlet pipe 10 at the inlet of the filter 21, and the water supply tank 7 and the booster pump 8 can be isolated through the manual valve 22, so that the maintenance work is facilitated; the water outlet pipe 11 is provided with a check valve 23 to prevent the booster pump 8 from being damaged by the reverse flow of high-pressure water.
The working principle is as follows: when a hydraulic test is performed on a reheater system 6 of a boiler, water is filled into the reheater system 6, namely, the water treated by a deaerator 2 is sent to the reheater system 6 of the boiler through a reheater pipeline 5 by an electric feed pump 1; then, boosting is carried out, namely after the booster pump 8 is started, boosted water is sent into the reheater system 6 through the buffer header 9 and the reheater booster pipe 12, the working frequency of the booster pump 8 is adjusted to 25Hz, then the opening degree of the pressure regulating valve 17 is gradually reduced until the booster pump is closed, in the process, the outlet pressure of the booster pump 8 is gradually and slowly increased, the purpose of preliminary boosting and slow going is achieved, the system safety is guaranteed, then the working frequency of the booster pump 8 is increased by adjusting the frequency converter, and boosting is continued until the requirement of a hydraulic pressure test is met by observing a pressure gauge 18 in the reheater system 6; stabilizing the pressure for a period of time to observe whether leakage exists; when a hydraulic pressure test is carried out on the superheater system 4 of the boiler, firstly, water is filled into the superheater system 4, namely, the water treated by the deaerator 2 is sent into the superheater system 4 of the boiler through the electric feed water pump 1 and the superheater pipeline 3; then boosting, namely after the booster pump 8 is started, the boosted water is sent into the superheater system 4 through the buffer header 9 and the superheater boosting pipe 13, the working frequency of the booster pump 8 is adjusted to 25Hz, then the opening degree of the pressure regulating valve 17 is gradually reduced until the pressure regulating valve is closed, in the process, the outlet pressure of the booster pump 8 is gradually and slowly increased, so that the purpose of slowly performing primary boosting is achieved, the system safety is ensured, then the working frequency of the booster pump 8 is increased by adjusting the frequency converter, and boosting is continued until the requirement of a hydraulic pressure test is met by observing a pressure gauge 18 in the superheater system 4; stabilizing the pressure for a period of time to observe whether leakage exists.
Through the utility model discloses can carry out hydraulic test in order to verify boiler system's tightness to huge boiler system comprehensively, in the hydraulic test process, can satisfy boiler hydraulic test water feeding requirement and can satisfy the speed requirement that steps up again in order to accomplish hydraulic test, do not need the artifical ray of utilizing to check one by one moreover, reduce work load, reduce intensity of labour, efficient, moreover the utility model discloses a reform transform on original system basis, it is with low costs.
Example 2: as shown in fig. 3, the present embodiment provides a hydraulic test system suitable for a pulverized coal boiler of a supercritical power station, which includes an electric feed pump 1, and the overall structure of the hydraulic test system is substantially the same as that of embodiment 1, except that a water outlet pipe 11 between an inlet of a buffer header 9 and an outlet of an adjacent check valve 23 is a hose, so as to facilitate disassembly and assembly; through two sets of the utility model discloses carry out hydrostatic test respectively to two boiler systems, when carrying out the hydrostatic test process to one of them boiler system, if booster pump 8 breaks down, can be connected to the buffering collection box 9 that is carrying out the hydrostatic test after dismantling the hose that corresponds with another boiler system, when one of them booster pump 8 breaks down, can in time start the booster pump 8 that corresponds with another boiler system, guarantee that the hydrostatic test normally goes on; the water storage tank 24 is also included, the water outlet of the water storage tank 24 is communicated with the water supply tank 7 through a water supply pipeline 25, and a water supply valve 26 is arranged on the water supply pipeline 25; the storage water tank 24 stores a large amount of standby water, so that the demand of the water supply water tank 7 for using water at any time can be met, and the water in the storage water tank 24 can automatically flow into the water supply water tank 7 through the height difference.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A hydraulic pressure test system suitable for a supercritical power station pulverized coal boiler comprises an electric water feed pump, wherein a water inlet of the electric water feed pump is communicated with a water outlet of a deaerator, a water outlet of the electric water feed pump is communicated with a superheater system through a superheater pipeline, and a middle tap of the electric water feed pump is communicated with a reheater system through a reheater pipeline; the device is characterized by also comprising a water supply tank, a booster pump and a buffer header; the inlet of the booster pump is communicated with the water supply tank through a water inlet pipe, and the outlet of the booster pump is communicated with the inlet of the buffer header through a water outlet pipe; a first outlet of the buffer collection box is communicated with the reheater system through a reheater pressure boosting pipe, a second outlet of the buffer collection box is communicated with the superheater system through a superheater pressure boosting pipe, a first isolation valve is arranged on the reheater pressure boosting pipe, and a second isolation valve is arranged on the superheater pressure boosting pipe; a pressure regulating pipeline is connected between the water outlet pipe and the water supply water tank, and a pressure regulating valve is arranged on the pressure regulating pipeline; pressure gauges are arranged in the superheater system, the reheater system and the water outlet of the booster pump.
2. The hydraulic test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 1, wherein the booster pump is a high-pressure plunger pump.
3. The hydraulic test system applicable to the pulverized coal fired boiler of the supercritical power plant as claimed in claim 1, wherein a first block valve is installed on the reheater boost pipe at the outlet of the first isolation valve, and a second block valve is installed on the superheater boost pipe at the outlet of the second isolation valve.
4. The hydraulic test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 1, wherein the water inlet pipe is provided with a filter.
5. The hydraulic test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 4, wherein the water inlet pipe at the inlet of the filter is provided with a manual valve.
6. The hydraulic test system applicable to the pulverized coal fired boiler of the supercritical power station as recited in any one of claims 1 to 5, wherein the superheater pipeline, the reheater pipeline and the water outlet pipe are respectively provided with a check valve.
7. The hydraulic test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 6, wherein the water outlet pipe between the inlet of the buffering header and the outlet of the adjacent check valve is a hose.
8. The hydraulic pressure test system applicable to the supercritical power station pulverized coal fired boiler as claimed in claim 7, further comprising a storage water tank, wherein a water outlet of the storage water tank is communicated with the water supply water tank through a water supply pipeline, and a water supply valve is arranged on the water supply pipeline.
9. The hydraulic pressure test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 6, wherein the superheater pipeline is provided with a water supply electric door and a flow sensor, the flow sensor is electrically connected with an input end of a controller, and an output end of the controller is electrically connected with the water supply electric door.
10. The hydraulic test system applicable to the supercritical power station pulverized coal boiler as claimed in claim 9, wherein the reheater pipe is provided with a pressure transmitter and a regulating valve, the pressure transmitter is electrically connected with the input end of the controller, and the output end of the controller is electrically connected with the regulating valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120768701.5U CN215065816U (en) | 2021-04-14 | 2021-04-14 | Hydraulic pressure test system suitable for supercritical power station pulverized coal boiler |
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| CN202120768701.5U CN215065816U (en) | 2021-04-14 | 2021-04-14 | Hydraulic pressure test system suitable for supercritical power station pulverized coal boiler |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575054A (en) * | 2022-10-19 | 2023-01-06 | 中国电建集团山东电力建设第一工程有限公司 | Interim thermal power station boiler hydrostatic test system |
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2021
- 2021-04-14 CN CN202120768701.5U patent/CN215065816U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115575054A (en) * | 2022-10-19 | 2023-01-06 | 中国电建集团山东电力建设第一工程有限公司 | Interim thermal power station boiler hydrostatic test system |
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