CN216047591U - Exhaust steam recovery device of periodic blowdown flash tank - Google Patents
Exhaust steam recovery device of periodic blowdown flash tank Download PDFInfo
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- CN216047591U CN216047591U CN202122445097.5U CN202122445097U CN216047591U CN 216047591 U CN216047591 U CN 216047591U CN 202122445097 U CN202122445097 U CN 202122445097U CN 216047591 U CN216047591 U CN 216047591U
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Abstract
The utility model provides a periodical blowdown flash tank dead steam recovery device, wherein a safety valve and a dead steam main pipeline are arranged at the top of the periodical blowdown flash tank, the safety valve is used for releasing the pressure in the periodical blowdown flash tank when the pressure in the periodical blowdown flash tank rises to the set pressure of the safety valve, the dead steam main pipeline is sequentially connected with a mixer communicating pipeline, a mixer emptying pipeline and the atmosphere, a mixer is communicated with the periodical blowdown flash tank through the mixer communicating pipeline, the mixer is connected with a demineralized water pipeline through a mixer desuperheating water pipeline, and the bottom of the mixer is connected to a drain tank through a drain tank connecting pipeline. The dead steam recovery device provided by the utility model can eliminate the potential safety hazard caused by the direct exhaust of dead steam to surrounding equipment and environment, and the safety valve is used for releasing the pressure of the periodical blowdown flash tank with abnormally increased internal pressure, so that the normal operation and safe production of a waste incineration main process system are ensured.
Description
Technical Field
The utility model belongs to the technical field of exhaust steam recovery, and particularly relates to a periodic blowdown flash tank exhaust steam recovery device of a waste incineration power plant.
Background
The periodic blowdown flash tank of msw incineration power plant during operation can produce a large amount of exhaust steam, if directly discharge these exhaust steam to the air, not only can cause the waste of energy and working medium and to the thermal pollution of environment, the exhaust steam discharge port condenses very easily in addition and forms water smoke, forms the potential safety hazard to equipment and environment around the periodic blowdown flash tank.
Some existing power plants may be provided with means for recovering dead steam for periodic blowdown flash tanks to address the above problems. However, since the periodic blowdown flash tank belongs to the pressure vessel, when the exhaust volume of a valve or a pipeline in the exhaust steam recovery device is less than the exhaust steam generation volume of the periodic blowdown flash tank, the periodic blowdown flash tank has a certain explosion risk.
Based on this, how to give consideration to the security of the exhaust steam recovery device while recycling the exhaust steam discharged by the periodic blowdown flash tank, the exhaust steam is recycled on the premise of ensuring that the safety production of the waste incineration main process system is not affected, and the technical problem to be solved is needed urgently.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide the exhaust steam recovery device of the periodic blowdown flash tank, which has good exhaust steam recovery effect and high safety and aims at overcoming the defects in the prior art.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a waste steam recovery device of a periodic blowdown flash tank, which comprises: the device comprises a periodic blowdown flash tank, a mixer, a drain tank, a safety valve and a demineralized water pipeline; the top of the periodic blowdown flash tank is provided with a safety valve and a main exhaust steam pipeline; the safety valve is used for releasing the pressure in the periodic blowdown flash tank when the pressure of the periodic blowdown flash tank is increased to the setting pressure of the safety valve; the main exhaust steam pipeline is sequentially connected with a mixer communicating pipeline, a mixer emptying pipeline and the atmosphere; the mixer is communicated with the periodic blowdown flash tank through the mixer communicating pipeline, is connected to the atmosphere through a mixer emptying pipeline, and is also connected with the demineralized water pipeline through a mixer desuperheating water pipeline; the drain tank is communicated with the bottom of the mixer through a drain tank connecting pipeline.
On the basis of the technical scheme, the setting pressure of the safety valve is 1-1.2 times of the design pressure of the periodic blowdown flash tank.
On the basis of the technical scheme, the setting pressure of the safety valve is 1.05 times of the design pressure of the periodic blowdown flash tank.
On the basis of the technical scheme, a first valve is arranged on the exhaust steam main pipeline and is arranged between the mixer communicating pipeline and the mixer emptying pipeline.
On the basis of the technical scheme, a second valve is arranged on the communicating pipeline of the mixer.
On the basis of the technical scheme, a third valve is arranged on the emptying pipeline of the mixer.
On the basis of the technical scheme, the mixer desuperheating water pipeline comprises a first desuperheating water pipeline and a second desuperheating water pipeline, and fourth valves are respectively arranged on the first desuperheating water pipeline and the second desuperheating water pipeline.
On the basis of the technical scheme, a fifth valve is arranged on the drain tank connecting pipeline.
On the basis of the technical scheme, a pollution discharge cooling pool is arranged at the bottom of the periodic pollution discharge flash tank.
On the basis of the technical scheme, the periodic blowdown flash tank is communicated to the blowdown cooling pool through a blowdown pipeline.
Compared with the prior art, the utility model has the beneficial effects that:
(1) the exhaust steam recovery device for the periodic blowdown flash tank provided by the utility model can discharge the exhaust steam of the periodic blowdown flash tank to the mixer, and the exhaust steam in the mixer is sprayed by using demineralized water to reduce the temperature, so that the exhaust steam is condensed and then enters the drain tank to be recovered. The exhaust steam recovery device recovers the exhaust steam medium and the heat of the exhaust steam, and simultaneously eliminates the potential safety hazard caused by the direct discharge of the exhaust steam generated by the periodic blowdown flash tank to surrounding equipment and environment.
(2) According to the dead steam recovery device for the periodic blowdown flash tank, the safety valve is arranged at the top of the periodic blowdown flash tank, and the safety valve can release the pressure in the periodic blowdown flash tank when the pressure in the periodic blowdown flash tank rises to the setting pressure of the safety valve. When a valve in the recovery device is abnormally closed or a pipeline is blocked, the safety valve is utilized to release the pressure of the periodical blowdown flash tank with the raised internal pressure, so that the explosion risk caused by the overhigh internal pressure of the periodical blowdown flash tank is effectively avoided, the safety of the recovery device is improved, and the normal operation and the safe production of a waste incineration main process system are ensured.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the dead steam recovery device of the periodic blowdown flash tank of the utility model.
Wherein, 1-periodic blowdown flash tank; 2-a mixer; 3-a drain tank; 4-safety valve; 5-a demineralized water pipeline; 6-a main exhaust steam pipeline; 61-a first valve; 7-the mixer is communicated with the pipeline; 71-a second valve; 8-emptying the mixer pipe; 81-a third valve; 9-mixer desuperheating water pipeline; 91-a first desuperheating water conduit; 92-a second desuperheating water conduit; 93-a fourth valve; 10-the drain tank is connected with a pipeline; 101-fifth valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention is further illustrated by the following examples, which are not to be construed as limiting the utility model.
Referring to fig. 1, the dead steam recycling device for a periodic blowdown flash tank according to the present invention includes: the device comprises a periodic sewage discharge flash tank 1, a mixer 2, a drain tank 3, a safety valve 4 and a demineralized water pipeline 5; the top of the periodical blowdown flash tank 1 is provided with a safety valve 4 and a main exhaust steam pipeline 6; the safety valve 4 is used for releasing the pressure in the periodic blowdown flash tank 1 when the pressure of the periodic blowdown flash tank 1 is increased to the setting pressure of the safety valve 4; the main exhaust steam pipeline 6 is sequentially connected with a mixer communicating pipeline 7, a mixer emptying pipeline 8 and the atmosphere.
The mixer 2 is communicated with the periodic sewage discharge flash tank 1 through the mixer communicating pipeline 7, the mixer 2 is connected to the atmosphere through the mixer emptying pipeline 8, and the mixer 2 is also connected with the demineralized water pipeline 5 through the mixer desuperheating water pipeline 9. The drain tank 3 is communicated with the bottom of the mixer 2 through a drain tank connecting pipeline 10.
Further, the setting pressure of the safety valve 4 is 1-1.2 times of the design pressure of the periodic blowdown flash tank 1. The specific type of the safety valve 4 and the setting pressure of the safety valve 4 can be determined according to the volume of the periodic blowdown flash tank 1 and related parameters. In this embodiment, the volume of the periodic blowdown flash tank 1 is 1.5m3The model of the safety valve is A48Y type spring with wrenchProvided is a safety valve. Preferably, the setting pressure of the safety valve 4 is set to 1.05 times of the design pressure of the periodic blowdown flash tank 1.
Further, a first valve 61 is arranged on the main exhaust steam pipeline 6, and the periodic blowdown flash tank 1 is connected to the atmosphere through the first valve 61. The first valve 61 is in a closed state when the recovery device normally operates, and when the exhaust steam recovery device fails or the steam trap 2 cannot accept the exhaust steam discharged by the periodic blowdown flash tank due to other reasons, the exhaust steam generated by the periodic blowdown flash tank can be temporarily discharged by opening the first valve 61.
The mixer communicating pipe 7 is provided with a second valve 71, and dead steam in the periodic blowdown flash tank 1 enters the mixer 2 through the mixer communicating pipe 7 by opening the second valve 71. The mixer emptying pipe 8 is provided with a third valve 81, and the mixer 2 is connected to the atmosphere through the third valve 81. In this embodiment, the mixer emptying pipeline 7 and the third valve 81 are arranged, so that the air in the mixer 2 can be discharged at the initial starting stage of the exhaust steam recovery device, bubbles are effectively prevented from being formed in each pipeline and valve when the air in the mixer enters the recovery system, the pipeline communication is not smooth, and the smooth operation of the recovery device is ensured.
Referring to fig. 1, the mixer desuperheating water pipe 9 has two, including a first desuperheating water pipe 91 and a second desuperheating water pipe 92. The first and second temperature-reducing water pipes 91 and 92 are arranged in parallel on the side wall of the mixer, the first temperature-reducing water pipe 91 is located above the second temperature-reducing water pipe 92, and the first and second temperature-reducing water pipes 91 and 92 are respectively provided with a fourth valve 93. In this embodiment, a mixer desuperheating water pipeline 9 is connected respectively at the lateral wall upper portion and the lower part of mixer 2, can ensure the more even mixture of demineralized water and exhaust steam, reach better cooling effect.
And a fifth valve 101 is arranged on the drain tank connecting pipeline 10. After the waste steam in the mixer 2 is subjected to the temperature reduction effect of the demineralized water sprayed by the first temperature reduction water pipeline 91 and the second temperature reduction water pipeline 92, condensed water is formed and is concentrated at the bottom of the mixer 2. By opening the fifth valve 101, the condensate is introduced into the drain tank 3 through the drain tank connection pipe 10 and collected.
Further, a blowdown cooling pool is further arranged at the bottom of the periodic blowdown flash tank 1, and the periodic blowdown flash tank 1 is connected to the blowdown cooling pool through a blowdown pipeline.
The working principle of the utility model is as follows:
after the periodic blowdown flash tank recovery device is installed, the safety valve 4 above the body of the periodic blowdown flash tank 1 needs to be set, and the set pressure is 1-1.2 times of the design pressure of the periodic blowdown flash tank 1.
When the recovery device is in a normal operation condition, the safety valve 4 is in a closed state, exhaust steam generated by the periodic blowdown flash tank 1 is connected to the mixer 2 through the mixer communicating pipeline 7, the exhaust steam is condensed into condensed water by spraying brine to the mixer 2 for temperature reduction, and the condensed water is collected into the drain tank 3 through the drain tank connecting pipeline 10, so that the recovery of the exhaust steam is realized. When the dead steam in the periodic blowdown flash tank 1 cannot be smoothly discharged due to misoperation, equipment failure and the like of each valve or connecting pipeline in the recovery device, the pressure in the periodic blowdown flash tank 1 can be increased, and when the pressure of the periodic blowdown flash tank 1 is increased to the set pressure of the safety valve 4, the safety valve 4 can be opened and releases the pressure in the periodic blowdown flash tank 1, so that the explosion risk of the periodic blowdown flash tank is eliminated, and the safe operation of the whole system of the recovery device is ensured.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (10)
1. The utility model provides a periodic blowdown flash tank exhaust steam recovery unit which characterized in that includes: the device comprises a periodic sewage discharge flash tank (1), a mixer (2), a drain tank (3), a safety valve (4) and a demineralized water pipeline (5);
the top of the periodical blowdown flash tank (1) is provided with a safety valve (4) and a main exhaust steam pipeline (6); the safety valve (4) is used for releasing the pressure in the periodic blowdown flash tank (1) when the pressure of the periodic blowdown flash tank (1) is increased to the setting pressure of the safety valve (4); the main exhaust steam pipeline (6) is sequentially connected with a mixer communicating pipeline (7), a mixer emptying pipeline (8) and the atmosphere;
the mixer (2) is communicated with the periodic sewage discharge flash tank (1) through the mixer communicating pipeline (7), the mixer (2) is connected to the atmosphere through a mixer emptying pipeline (8), and the mixer (2) is also communicated with the demineralized water pipeline (5) through a mixer desuperheating water pipeline (9);
the drain tank (3) is communicated with the bottom of the mixer (2) through a drain tank connecting pipeline (10).
2. The dead steam recovery device of the periodic blowdown flash tank of claim 1, wherein the setting pressure of the safety valve (4) is 1-1.2 times of the design pressure of the periodic blowdown flash tank (1).
3. The blowdown flash tank dead steam recovery device as claimed in claim 2, wherein the set pressure of the safety valve (4) is 1.05 times the design pressure of the blowdown flash tank (1).
4. The dead steam recovery device of the periodically blowdown flash tank as claimed in claim 1, wherein a first valve (61) is arranged on the main dead steam pipe (6), and the first valve (61) is arranged between the mixer communicating pipe (7) and the mixer emptying pipe (8).
5. The blowdown flash tank dead steam recovery device as claimed in claim 1, wherein the mixer communicating pipe (7) is provided with a second valve (71).
6. The blowdown flash tank dead steam recovery device as claimed in claim 1, wherein a third valve (81) is provided on the mixer drain line (8).
7. The blowdown flash tank dead steam recovery device as claimed in claim 1, wherein the mixer desuperheating water conduit (9) comprises a first desuperheating water conduit (91) and a second desuperheating water conduit (92), and a fourth valve (93) is provided on each of the first desuperheating water conduit (91) and the second desuperheating water conduit (92).
8. The blowdown flash tank dead steam recovery device as claimed in claim 1, wherein a fifth valve (101) is provided on the drain tank connecting pipe (10).
9. The blowdown flash tank dead steam recovery device as claimed in claim 1, wherein a blowdown cooling tank is arranged at the bottom of the blowdown flash tank (1).
10. The blowdown flash tank dead steam recovery device of claim 9, wherein the blowdown flash tank (1) is communicated to the blowdown cooling tank through a blowdown conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445097.5U CN216047591U (en) | 2021-10-09 | 2021-10-09 | Exhaust steam recovery device of periodic blowdown flash tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122445097.5U CN216047591U (en) | 2021-10-09 | 2021-10-09 | Exhaust steam recovery device of periodic blowdown flash tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216047591U true CN216047591U (en) | 2022-03-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122445097.5U Active CN216047591U (en) | 2021-10-09 | 2021-10-09 | Exhaust steam recovery device of periodic blowdown flash tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216047591U (en) |
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2021
- 2021-10-09 CN CN202122445097.5U patent/CN216047591U/en active Active
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